raid5: cannot start dirty degraded array

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* raid5: cannot start dirty degraded array
@ 2009-12-23 11:50 Rainer Fuegenstein
  2009-12-23 12:50 ` Rainer Fuegenstein
  2009-12-23 13:13 ` spren.gm
  0 siblings, 2 replies; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-23 11:50 UTC (permalink / raw)
  To: linux-raid

hi,

got a "nice" early christmas present this morning: after a crash, the raid5
(consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(

the history:
sometimes, the raid kicked out one disk, started a resync (which
lasted for about 3 days) and was fine after that. a few days ago I
replaced drive sdd (which seemed to cause the troubles) and synced the
raid again which finished yesterday in the early afternoon. at 10am
today the system crashed and the raid won't start:

OS is Centos 5
mdadm - v2.6.9 - 10th March 2009
Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux


Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
Dec 23 12:30:19 alfred kernel: md: autorun ...
Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
Dec 23 12:30:19 alfred kernel: md: created md0
Dec 23 12:30:19 alfred kernel: md: bind<sda1>
Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
    (no reconstruction is actually started, disks are idle)
Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
Dec 23 12:30:19 alfred kernel: md: md0 stopped.
Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded

# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
unused devices: <none>

filesystem used on top of md0 is xfs.

please advice what to do next and let me know if you need further
information. really don't want to lose 3TB worth of data :-(


tnx in advance.


^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: raid5: cannot start dirty degraded array
  2009-12-23 11:50 raid5: cannot start dirty degraded array Rainer Fuegenstein
@ 2009-12-23 12:50 ` Rainer Fuegenstein
  2009-12-23 13:25   ` Majed B.
  2009-12-23 13:13 ` spren.gm
  1 sibling, 1 reply; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-23 12:50 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

addendum: when going through the logs I found the reason:

Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
Dec 23 02:56:50 alfred kernel: ata1.00: disabled
Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
Dec 23 02:56:50 alfred kernel: ata1: EH complete
Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
 [...]
Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
 (crash here)

RF> hi,

RF> got a "nice" early christmas present this morning: after a crash, the raid5
RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(

RF> the history:
RF> sometimes, the raid kicked out one disk, started a resync (which
RF> lasted for about 3 days) and was fine after that. a few days ago I
RF> replaced drive sdd (which seemed to cause the troubles) and synced the
RF> raid again which finished yesterday in the early afternoon. at 10am
RF> today the system crashed and the raid won't start:

RF> OS is Centos 5
RF> mdadm - v2.6.9 - 10th March 2009
RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux

RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
RF> Dec 23 12:30:19 alfred kernel: md: created md0
RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
RF>     (no reconstruction is actually started, disks are idle)
RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded

RF> # cat /proc/mdstat
RF> Personalities : [raid6] [raid5] [raid4]
RF> unused devices: <none>

RF> filesystem used on top of md0 is xfs.

RF> please advice what to do next and let me know if you need further
RF> information. really don't want to lose 3TB worth of data :-(

RF> tnx in advance.

RF> --
RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
RF> the body of a message to majordomo@vger.kernel.org
RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html

------------------------------------------------------------------------------
Unix gives you just enough rope to hang yourself -- and then a couple of more 
feet, just to be sure.
(Eric Allman)
------------------------------------------------------------------------------

^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: raid5: cannot start dirty degraded array
  2009-12-23 12:50 ` Rainer Fuegenstein
@ 2009-12-23 13:25   ` Majed B.
  2009-12-23 13:44     ` Re[2]: " Rainer Fuegenstein
  0 siblings, 1 reply; 18+ messages in thread
From: Majed B. @ 2009-12-23 13:25 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

Give the output of these:

mdadm -E /dev/sd[a-z]

From the errors you show, it seems like one of the disks is dead (sda)
or dying. It could be just a bad PCB (the controller board of the
disk) as it refuses to return SMART data, so you might be able to
rescue data by changing the PCB, if it's that important to have that
disk.

As for the array, you can run a degraded array by force assembling it:
mdadm -Af /dev/md0
In the command above, mdadm will search on existing disks and
partitions, which of them belongs to an array and assemble that array,
if possible.

I also suggest you install smartmontools package and run smartctl -a
/dev/sd[a-z] and see the report for each disk to make sure you don't
have bad sectors or bad cables (CRC/ATA read errors) on any of the
disks.

On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
<rfu@kaneda.iguw.tuwien.ac.at> wrote:
> addendum: when going through the logs I found the reason:
>
> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
> Dec 23 02:56:50 alfred kernel: ata1: EH complete
> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>  [...]
> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>  (crash here)
>
>
> RF> hi,
>
> RF> got a "nice" early christmas present this morning: after a crash, the raid5
> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>
> RF> the history:
> RF> sometimes, the raid kicked out one disk, started a resync (which
> RF> lasted for about 3 days) and was fine after that. a few days ago I
> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
> RF> raid again which finished yesterday in the early afternoon. at 10am
> RF> today the system crashed and the raid won't start:
>
> RF> OS is Centos 5
> RF> mdadm - v2.6.9 - 10th March 2009
> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>
>
> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
> RF> Dec 23 12:30:19 alfred kernel: md: created md0
> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
> RF>     (no reconstruction is actually started, disks are idle)
> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>
> RF> # cat /proc/mdstat
> RF> Personalities : [raid6] [raid5] [raid4]
> RF> unused devices: <none>
>
> RF> filesystem used on top of md0 is xfs.
>
> RF> please advice what to do next and let me know if you need further
> RF> information. really don't want to lose 3TB worth of data :-(
>
>
> RF> tnx in advance.
>
> RF> --
> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> RF> the body of a message to majordomo@vger.kernel.org
> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>
> ------------------------------------------------------------------------------
> Unix gives you just enough rope to hang yourself -- and then a couple of more
> feet, just to be sure.
> (Eric Allman)
> ------------------------------------------------------------------------------
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>



-- 
       Majed B.
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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re[2]: raid5: cannot start dirty degraded array
  2009-12-23 13:25   ` Majed B.
@ 2009-12-23 13:44     ` Rainer Fuegenstein
  2009-12-23 13:48       ` Majed B.
  0 siblings, 1 reply; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-23 13:44 UTC (permalink / raw)
  To: Majed B.; +Cc: linux-raid


MB> Give the output of these:
MB> mdadm -E /dev/sd[a-z]

]# mdadm -E /dev/sd[a-z]
mdadm: No md superblock detected on /dev/sda.
mdadm: No md superblock detected on /dev/sdb.
mdadm: No md superblock detected on /dev/sdc.
mdadm: No md superblock detected on /dev/sdd.

I assume that's not a good sign ?!

sda was powered on and running after the reboot, a smartctl short test
revealed no errors and smartctl -a also looks unsuspicious (see
below). the drives are rather new.

guess its more likely to be either a problem of the power supply
(400W) or communication between controller and disk.

/dev/sdd (before it was replaced) reported the following:

Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors

(what triggered a re-sync of the array)


# smartctl -a /dev/sda
smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Device Model:     WDC WD15EADS-00R6B0
Serial Number:    WD-WCAUP0017818
Firmware Version: 01.00A01
User Capacity:    1,500,301,910,016 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Wed Dec 23 14:40:46 2009 CET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x82) Offline data collection activity
                                        was completed without error.
                                        Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0) The previous self-test routine completed
                                        without error or no self-test has ever
                                        been run.
Total time to complete Offline
data collection:                 (40800) seconds.
Offline data collection
capabilities:                    (0x7b) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        Offline surface scan supported.
                                        Self-test supported.
                                        Conveyance Self-test supported.
                                        Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                                        power-saving mode.
                                        Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                                        General Purpose Logging supported.
Short self-test routine
recommended polling time:        (   2) minutes.
Extended self-test routine
recommended polling time:        ( 255) minutes.
Conveyance self-test routine
recommended polling time:        (   5) minutes.
SCT capabilities:              (0x303f) SCT Status supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
 10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%      5272         -

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.



>>From the errors you show, it seems like one of the disks is dead (sda)
MB> or dying. It could be just a bad PCB (the controller board of the
MB> disk) as it refuses to return SMART data, so you might be able to
MB> rescue data by changing the PCB, if it's that important to have that
MB> disk.

MB> As for the array, you can run a degraded array by force assembling it:
MB> mdadm -Af /dev/md0
MB> In the command above, mdadm will search on existing disks and
MB> partitions, which of them belongs to an array and assemble that array,
MB> if possible.

MB> I also suggest you install smartmontools package and run smartctl -a
MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
MB> disks.

MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>> addendum: when going through the logs I found the reason:
>>
>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>  [...]
>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>  (crash here)
>>
>>
>> RF> hi,
>>
>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>
>> RF> the history:
>> RF> sometimes, the raid kicked out one disk, started a resync (which
>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>> RF> raid again which finished yesterday in the early afternoon. at 10am
>> RF> today the system crashed and the raid won't start:
>>
>> RF> OS is Centos 5
>> RF> mdadm - v2.6.9 - 10th March 2009
>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>
>>
>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>> RF>     (no reconstruction is actually started, disks are idle)
>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>
>> RF> # cat /proc/mdstat
>> RF> Personalities : [raid6] [raid5] [raid4]
>> RF> unused devices: <none>
>>
>> RF> filesystem used on top of md0 is xfs.
>>
>> RF> please advice what to do next and let me know if you need further
>> RF> information. really don't want to lose 3TB worth of data :-(
>>
>>
>> RF> tnx in advance.
>>
>> RF> --
>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> RF> the body of a message to majordomo@vger.kernel.org
>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>>
>> ------------------------------------------------------------------------------
>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>> feet, just to be sure.
>> (Eric Allman)
>> ------------------------------------------------------------------------------
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>





------------------------------------------------------------------------------
Unix gives you just enough rope to hang yourself -- and then a couple of more 
feet, just to be sure.
(Eric Allman)
------------------------------------------------------------------------------

--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Re[2]: raid5: cannot start dirty degraded array
  2009-12-23 13:44     ` Re[2]: " Rainer Fuegenstein
@ 2009-12-23 13:48       ` Majed B.
  2009-12-23 14:02         ` Re[4]: " Rainer Fuegenstein
  0 siblings, 1 reply; 18+ messages in thread
From: Majed B. @ 2009-12-23 13:48 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

My bad, run this: mdadm -E /dev/sd[a-z]1
1 is the partition which most likely you added to the array rather
than the whole disk (which is normal).

You've included the smart report of one disk only. I suggest you look
at the other disks as well and make sure that they're not reporting
any errors. Also, keep in mind that you should run smart test
periodically (can be configured) and that if you haven't run any test
before, you have to run a long or offline test before making sure that
you don't have bad sectors.

On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
<rfu@kaneda.iguw.tuwien.ac.at> wrote:
>
> MB> Give the output of these:
> MB> mdadm -E /dev/sd[a-z]
>
> ]# mdadm -E /dev/sd[a-z]
> mdadm: No md superblock detected on /dev/sda.
> mdadm: No md superblock detected on /dev/sdb.
> mdadm: No md superblock detected on /dev/sdc.
> mdadm: No md superblock detected on /dev/sdd.
>
> I assume that's not a good sign ?!
>
> sda was powered on and running after the reboot, a smartctl short test
> revealed no errors and smartctl -a also looks unsuspicious (see
> below). the drives are rather new.
>
> guess its more likely to be either a problem of the power supply
> (400W) or communication between controller and disk.
>
> /dev/sdd (before it was replaced) reported the following:
>
> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>
> (what triggered a re-sync of the array)
>
>
> # smartctl -a /dev/sda
> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
> Home page is http://smartmontools.sourceforge.net/
>
> === START OF INFORMATION SECTION ===
> Device Model:     WDC WD15EADS-00R6B0
> Serial Number:    WD-WCAUP0017818
> Firmware Version: 01.00A01
> User Capacity:    1,500,301,910,016 bytes
> Device is:        Not in smartctl database [for details use: -P showall]
> ATA Version is:   8
> ATA Standard is:  Exact ATA specification draft version not indicated
> Local Time is:    Wed Dec 23 14:40:46 2009 CET
> SMART support is: Available - device has SMART capability.
> SMART support is: Enabled
>
> === START OF READ SMART DATA SECTION ===
> SMART overall-health self-assessment test result: PASSED
>
> General SMART Values:
> Offline data collection status:  (0x82) Offline data collection activity
>                                        was completed without error.
>                                        Auto Offline Data Collection: Enabled.
> Self-test execution status:      (   0) The previous self-test routine completed
>                                        without error or no self-test has ever
>                                        been run.
> Total time to complete Offline
> data collection:                 (40800) seconds.
> Offline data collection
> capabilities:                    (0x7b) SMART execute Offline immediate.
>                                        Auto Offline data collection on/off support.
>                                        Suspend Offline collection upon new
>                                        command.
>                                        Offline surface scan supported.
>                                        Self-test supported.
>                                        Conveyance Self-test supported.
>                                        Selective Self-test supported.
> SMART capabilities:            (0x0003) Saves SMART data before entering
>                                        power-saving mode.
>                                        Supports SMART auto save timer.
> Error logging capability:        (0x01) Error logging supported.
>                                        General Purpose Logging supported.
> Short self-test routine
> recommended polling time:        (   2) minutes.
> Extended self-test routine
> recommended polling time:        ( 255) minutes.
> Conveyance self-test routine
> recommended polling time:        (   5) minutes.
> SCT capabilities:              (0x303f) SCT Status supported.
>                                        SCT Feature Control supported.
>                                        SCT Data Table supported.
>
> SMART Attributes Data Structure revision number: 16
> Vendor Specific SMART Attributes with Thresholds:
> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>
> SMART Error Log Version: 1
> No Errors Logged
>
> SMART Self-test log structure revision number 1
> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
> # 1  Short offline       Completed without error       00%      5272         -
>
> SMART Selective self-test log data structure revision number 1
>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>    1        0        0  Not_testing
>    2        0        0  Not_testing
>    3        0        0  Not_testing
>    4        0        0  Not_testing
>    5        0        0  Not_testing
> Selective self-test flags (0x0):
>  After scanning selected spans, do NOT read-scan remainder of disk.
> If Selective self-test is pending on power-up, resume after 0 minute delay.
>
>
>
>>>From the errors you show, it seems like one of the disks is dead (sda)
> MB> or dying. It could be just a bad PCB (the controller board of the
> MB> disk) as it refuses to return SMART data, so you might be able to
> MB> rescue data by changing the PCB, if it's that important to have that
> MB> disk.
>
> MB> As for the array, you can run a degraded array by force assembling it:
> MB> mdadm -Af /dev/md0
> MB> In the command above, mdadm will search on existing disks and
> MB> partitions, which of them belongs to an array and assemble that array,
> MB> if possible.
>
> MB> I also suggest you install smartmontools package and run smartctl -a
> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
> MB> disks.
>
> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>> addendum: when going through the logs I found the reason:
>>>
>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>  [...]
>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>  (crash here)
>>>
>>>
>>> RF> hi,
>>>
>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>
>>> RF> the history:
>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>> RF> today the system crashed and the raid won't start:
>>>
>>> RF> OS is Centos 5
>>> RF> mdadm - v2.6.9 - 10th March 2009
>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>
>>>
>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>> RF>     (no reconstruction is actually started, disks are idle)
>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>
>>> RF> # cat /proc/mdstat
>>> RF> Personalities : [raid6] [raid5] [raid4]
>>> RF> unused devices: <none>
>>>
>>> RF> filesystem used on top of md0 is xfs.
>>>
>>> RF> please advice what to do next and let me know if you need further
>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>
>>>
>>> RF> tnx in advance.
>>>
>>> RF> --
>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> RF> the body of a message to majordomo@vger.kernel.org
>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>> feet, just to be sure.
>>> (Eric Allman)
>>> ------------------------------------------------------------------------------
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> the body of a message to majordomo@vger.kernel.org
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>>>
>
>
>
>
>
> ------------------------------------------------------------------------------
> Unix gives you just enough rope to hang yourself -- and then a couple of more
> feet, just to be sure.
> (Eric Allman)
> ------------------------------------------------------------------------------
>
>



-- 
       Majed B.
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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re[4]: raid5: cannot start dirty degraded array
  2009-12-23 13:48       ` Majed B.
@ 2009-12-23 14:02         ` Rainer Fuegenstein
  2009-12-23 14:04           ` Majed B.
  0 siblings, 1 reply; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-23 14:02 UTC (permalink / raw)
  To: linux-raid


MB> My bad, run this: mdadm -E /dev/sd[a-z]1
should have figured this out myself (sorry; currently running in
panic mode ;-) )

MB> 1 is the partition which most likely you added to the array rather
MB> than the whole disk (which is normal).

# mdadm -E /dev/sd[a-z]1
/dev/sda1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 81833582:d651e953:48cc5797:38b256ea
  Creation Time : Mon Mar 31 13:30:45 2008
     Raid Level : raid5
  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0

    Update Time : Wed Dec 23 02:54:49 2009
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0
       Checksum : 6cfa3a64 - correct
         Events : 119530

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     2       8        1        2      active sync   /dev/sda1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       49        1      active sync   /dev/sdd1
   2     2       8        1        2      active sync   /dev/sda1
   3     3       8       33        3      active sync   /dev/sdc1
/dev/sdb1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 81833582:d651e953:48cc5797:38b256ea
  Creation Time : Mon Mar 31 13:30:45 2008
     Raid Level : raid5
  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0

    Update Time : Wed Dec 23 10:07:42 2009
          State : active
 Active Devices : 3
Working Devices : 3
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 6cf8f610 - correct
         Events : 130037

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     0       8       17        0      active sync   /dev/sdb1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       49        1      active sync   /dev/sdd1
   2     2       0        0        2      faulty removed
   3     3       8       33        3      active sync   /dev/sdc1
/dev/sdc1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 81833582:d651e953:48cc5797:38b256ea
  Creation Time : Mon Mar 31 13:30:45 2008
     Raid Level : raid5
  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0

    Update Time : Wed Dec 23 10:07:42 2009
          State : active
 Active Devices : 3
Working Devices : 3
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 6cf8f626 - correct
         Events : 130037

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     3       8       33        3      active sync   /dev/sdc1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       49        1      active sync   /dev/sdd1
   2     2       0        0        2      faulty removed
   3     3       8       33        3      active sync   /dev/sdc1
/dev/sdd1:
          Magic : a92b4efc
        Version : 0.90.00
           UUID : 81833582:d651e953:48cc5797:38b256ea
  Creation Time : Mon Mar 31 13:30:45 2008
     Raid Level : raid5
  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0

    Update Time : Wed Dec 23 10:07:42 2009
          State : active
 Active Devices : 3
Working Devices : 3
 Failed Devices : 1
  Spare Devices : 0
       Checksum : 6cf8f632 - correct
         Events : 130037

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     1       8       49        1      active sync   /dev/sdd1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       49        1      active sync   /dev/sdd1
   2     2       0        0        2      faulty removed
   3     3       8       33        3      active sync   /dev/sdc1
[root@alfred log]#

MB> You've included the smart report of one disk only. I suggest you look
MB> at the other disks as well and make sure that they're not reporting
MB> any errors. Also, keep in mind that you should run smart test
MB> periodically (can be configured) and that if you haven't run any test
MB> before, you have to run a long or offline test before making sure that
MB> you don't have bad sectors.

tnx for the hint, will do that as soon as I got my data back (if ever
...)


MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>
>> MB> Give the output of these:
>> MB> mdadm -E /dev/sd[a-z]
>>
>> ]# mdadm -E /dev/sd[a-z]
>> mdadm: No md superblock detected on /dev/sda.
>> mdadm: No md superblock detected on /dev/sdb.
>> mdadm: No md superblock detected on /dev/sdc.
>> mdadm: No md superblock detected on /dev/sdd.
>>
>> I assume that's not a good sign ?!
>>
>> sda was powered on and running after the reboot, a smartctl short test
>> revealed no errors and smartctl -a also looks unsuspicious (see
>> below). the drives are rather new.
>>
>> guess its more likely to be either a problem of the power supply
>> (400W) or communication between controller and disk.
>>
>> /dev/sdd (before it was replaced) reported the following:
>>
>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>
>> (what triggered a re-sync of the array)
>>
>>
>> # smartctl -a /dev/sda
>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>> Home page is http://smartmontools.sourceforge.net/
>>
>> === START OF INFORMATION SECTION ===
>> Device Model:     WDC WD15EADS-00R6B0
>> Serial Number:    WD-WCAUP0017818
>> Firmware Version: 01.00A01
>> User Capacity:    1,500,301,910,016 bytes
>> Device is:        Not in smartctl database [for details use: -P showall]
>> ATA Version is:   8
>> ATA Standard is:  Exact ATA specification draft version not indicated
>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>> SMART support is: Available - device has SMART capability.
>> SMART support is: Enabled
>>
>> === START OF READ SMART DATA SECTION ===
>> SMART overall-health self-assessment test result: PASSED
>>
>> General SMART Values:
>> Offline data collection status:  (0x82) Offline data collection activity
>>                                        was completed without error.
>>                                        Auto Offline Data Collection: Enabled.
>> Self-test execution status:      (   0) The previous self-test routine completed
>>                                        without error or no self-test has ever
>>                                        been run.
>> Total time to complete Offline
>> data collection:                 (40800) seconds.
>> Offline data collection
>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>                                        Auto Offline data collection on/off support.
>>                                        Suspend Offline collection upon new
>>                                        command.
>>                                        Offline surface scan supported.
>>                                        Self-test supported.
>>                                        Conveyance Self-test supported.
>>                                        Selective Self-test supported.
>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>                                        power-saving mode.
>>                                        Supports SMART auto save timer.
>> Error logging capability:        (0x01) Error logging supported.
>>                                        General Purpose Logging supported.
>> Short self-test routine
>> recommended polling time:        (   2) minutes.
>> Extended self-test routine
>> recommended polling time:        ( 255) minutes.
>> Conveyance self-test routine
>> recommended polling time:        (   5) minutes.
>> SCT capabilities:              (0x303f) SCT Status supported.
>>                                        SCT Feature Control supported.
>>                                        SCT Data Table supported.
>>
>> SMART Attributes Data Structure revision number: 16
>> Vendor Specific SMART Attributes with Thresholds:
>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>
>> SMART Error Log Version: 1
>> No Errors Logged
>>
>> SMART Self-test log structure revision number 1
>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>> # 1  Short offline       Completed without error       00%      5272         -
>>
>> SMART Selective self-test log data structure revision number 1
>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>    1        0        0  Not_testing
>>    2        0        0  Not_testing
>>    3        0        0  Not_testing
>>    4        0        0  Not_testing
>>    5        0        0  Not_testing
>> Selective self-test flags (0x0):
>>  After scanning selected spans, do NOT read-scan remainder of disk.
>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>
>>
>>
>>>>From the errors you show, it seems like one of the disks is dead (sda)
>> MB> or dying. It could be just a bad PCB (the controller board of the
>> MB> disk) as it refuses to return SMART data, so you might be able to
>> MB> rescue data by changing the PCB, if it's that important to have that
>> MB> disk.
>>
>> MB> As for the array, you can run a degraded array by force assembling it:
>> MB> mdadm -Af /dev/md0
>> MB> In the command above, mdadm will search on existing disks and
>> MB> partitions, which of them belongs to an array and assemble that array,
>> MB> if possible.
>>
>> MB> I also suggest you install smartmontools package and run smartctl -a
>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>> MB> disks.
>>
>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>> addendum: when going through the logs I found the reason:
>>>>
>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>  [...]
>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>  (crash here)
>>>>
>>>>
>>>> RF> hi,
>>>>
>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>
>>>> RF> the history:
>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>> RF> today the system crashed and the raid won't start:
>>>>
>>>> RF> OS is Centos 5
>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>
>>>>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>
>>>> RF> # cat /proc/mdstat
>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>> RF> unused devices: <none>
>>>>
>>>> RF> filesystem used on top of md0 is xfs.
>>>>
>>>> RF> please advice what to do next and let me know if you need further
>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>
>>>>
>>>> RF> tnx in advance.
>>>>
>>>> RF> --
>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>> feet, just to be sure.
>>>> (Eric Allman)
>>>> ------------------------------------------------------------------------------
>>>>
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>> feet, just to be sure.
>> (Eric Allman)
>> ------------------------------------------------------------------------------
>>
>>





------------------------------------------------------------------------------
Unix gives you just enough rope to hang yourself -- and then a couple of more 
feet, just to be sure.
(Eric Allman)
------------------------------------------------------------------------------

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Re[4]: raid5: cannot start dirty degraded array
  2009-12-23 14:02         ` Re[4]: " Rainer Fuegenstein
@ 2009-12-23 14:04           ` Majed B.
  2009-12-23 14:30             ` Re[6]: " Rainer Fuegenstein
  0 siblings, 1 reply; 18+ messages in thread
From: Majed B. @ 2009-12-23 14:04 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

sda1 was the only affected member of the array so you should be able
to force-assemble the raid5 array and run it in degraded mode.

mdadm -Af /dev/md0
If that doesn't work for any reason, do this:
mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1

You can note the disk order from the output of mdadm -E

On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
<rfu@kaneda.iguw.tuwien.ac.at> wrote:
>
> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
> should have figured this out myself (sorry; currently running in
> panic mode ;-) )
>
> MB> 1 is the partition which most likely you added to the array rather
> MB> than the whole disk (which is normal).
>
> # mdadm -E /dev/sd[a-z]1
> /dev/sda1:
>          Magic : a92b4efc
>        Version : 0.90.00
>           UUID : 81833582:d651e953:48cc5797:38b256ea
>  Creation Time : Mon Mar 31 13:30:45 2008
>     Raid Level : raid5
>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>   Raid Devices : 4
>  Total Devices : 4
> Preferred Minor : 0
>
>    Update Time : Wed Dec 23 02:54:49 2009
>          State : clean
>  Active Devices : 4
> Working Devices : 4
>  Failed Devices : 0
>  Spare Devices : 0
>       Checksum : 6cfa3a64 - correct
>         Events : 119530
>
>         Layout : left-symmetric
>     Chunk Size : 64K
>
>      Number   Major   Minor   RaidDevice State
> this     2       8        1        2      active sync   /dev/sda1
>
>   0     0       8       17        0      active sync   /dev/sdb1
>   1     1       8       49        1      active sync   /dev/sdd1
>   2     2       8        1        2      active sync   /dev/sda1
>   3     3       8       33        3      active sync   /dev/sdc1
> /dev/sdb1:
>          Magic : a92b4efc
>        Version : 0.90.00
>           UUID : 81833582:d651e953:48cc5797:38b256ea
>  Creation Time : Mon Mar 31 13:30:45 2008
>     Raid Level : raid5
>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>   Raid Devices : 4
>  Total Devices : 4
> Preferred Minor : 0
>
>    Update Time : Wed Dec 23 10:07:42 2009
>          State : active
>  Active Devices : 3
> Working Devices : 3
>  Failed Devices : 1
>  Spare Devices : 0
>       Checksum : 6cf8f610 - correct
>         Events : 130037
>
>         Layout : left-symmetric
>     Chunk Size : 64K
>
>      Number   Major   Minor   RaidDevice State
> this     0       8       17        0      active sync   /dev/sdb1
>
>   0     0       8       17        0      active sync   /dev/sdb1
>   1     1       8       49        1      active sync   /dev/sdd1
>   2     2       0        0        2      faulty removed
>   3     3       8       33        3      active sync   /dev/sdc1
> /dev/sdc1:
>          Magic : a92b4efc
>        Version : 0.90.00
>           UUID : 81833582:d651e953:48cc5797:38b256ea
>  Creation Time : Mon Mar 31 13:30:45 2008
>     Raid Level : raid5
>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>   Raid Devices : 4
>  Total Devices : 4
> Preferred Minor : 0
>
>    Update Time : Wed Dec 23 10:07:42 2009
>          State : active
>  Active Devices : 3
> Working Devices : 3
>  Failed Devices : 1
>  Spare Devices : 0
>       Checksum : 6cf8f626 - correct
>         Events : 130037
>
>         Layout : left-symmetric
>     Chunk Size : 64K
>
>      Number   Major   Minor   RaidDevice State
> this     3       8       33        3      active sync   /dev/sdc1
>
>   0     0       8       17        0      active sync   /dev/sdb1
>   1     1       8       49        1      active sync   /dev/sdd1
>   2     2       0        0        2      faulty removed
>   3     3       8       33        3      active sync   /dev/sdc1
> /dev/sdd1:
>          Magic : a92b4efc
>        Version : 0.90.00
>           UUID : 81833582:d651e953:48cc5797:38b256ea
>  Creation Time : Mon Mar 31 13:30:45 2008
>     Raid Level : raid5
>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>   Raid Devices : 4
>  Total Devices : 4
> Preferred Minor : 0
>
>    Update Time : Wed Dec 23 10:07:42 2009
>          State : active
>  Active Devices : 3
> Working Devices : 3
>  Failed Devices : 1
>  Spare Devices : 0
>       Checksum : 6cf8f632 - correct
>         Events : 130037
>
>         Layout : left-symmetric
>     Chunk Size : 64K
>
>      Number   Major   Minor   RaidDevice State
> this     1       8       49        1      active sync   /dev/sdd1
>
>   0     0       8       17        0      active sync   /dev/sdb1
>   1     1       8       49        1      active sync   /dev/sdd1
>   2     2       0        0        2      faulty removed
>   3     3       8       33        3      active sync   /dev/sdc1
> [root@alfred log]#
>
> MB> You've included the smart report of one disk only. I suggest you look
> MB> at the other disks as well and make sure that they're not reporting
> MB> any errors. Also, keep in mind that you should run smart test
> MB> periodically (can be configured) and that if you haven't run any test
> MB> before, you have to run a long or offline test before making sure that
> MB> you don't have bad sectors.
>
> tnx for the hint, will do that as soon as I got my data back (if ever
> ...)
>
>
> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>
>>> MB> Give the output of these:
>>> MB> mdadm -E /dev/sd[a-z]
>>>
>>> ]# mdadm -E /dev/sd[a-z]
>>> mdadm: No md superblock detected on /dev/sda.
>>> mdadm: No md superblock detected on /dev/sdb.
>>> mdadm: No md superblock detected on /dev/sdc.
>>> mdadm: No md superblock detected on /dev/sdd.
>>>
>>> I assume that's not a good sign ?!
>>>
>>> sda was powered on and running after the reboot, a smartctl short test
>>> revealed no errors and smartctl -a also looks unsuspicious (see
>>> below). the drives are rather new.
>>>
>>> guess its more likely to be either a problem of the power supply
>>> (400W) or communication between controller and disk.
>>>
>>> /dev/sdd (before it was replaced) reported the following:
>>>
>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>
>>> (what triggered a re-sync of the array)
>>>
>>>
>>> # smartctl -a /dev/sda
>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>>> Home page is http://smartmontools.sourceforge.net/
>>>
>>> === START OF INFORMATION SECTION ===
>>> Device Model:     WDC WD15EADS-00R6B0
>>> Serial Number:    WD-WCAUP0017818
>>> Firmware Version: 01.00A01
>>> User Capacity:    1,500,301,910,016 bytes
>>> Device is:        Not in smartctl database [for details use: -P showall]
>>> ATA Version is:   8
>>> ATA Standard is:  Exact ATA specification draft version not indicated
>>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>>> SMART support is: Available - device has SMART capability.
>>> SMART support is: Enabled
>>>
>>> === START OF READ SMART DATA SECTION ===
>>> SMART overall-health self-assessment test result: PASSED
>>>
>>> General SMART Values:
>>> Offline data collection status:  (0x82) Offline data collection activity
>>>                                        was completed without error.
>>>                                        Auto Offline Data Collection: Enabled.
>>> Self-test execution status:      (   0) The previous self-test routine completed
>>>                                        without error or no self-test has ever
>>>                                        been run.
>>> Total time to complete Offline
>>> data collection:                 (40800) seconds.
>>> Offline data collection
>>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>>                                        Auto Offline data collection on/off support.
>>>                                        Suspend Offline collection upon new
>>>                                        command.
>>>                                        Offline surface scan supported.
>>>                                        Self-test supported.
>>>                                        Conveyance Self-test supported.
>>>                                        Selective Self-test supported.
>>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>>                                        power-saving mode.
>>>                                        Supports SMART auto save timer.
>>> Error logging capability:        (0x01) Error logging supported.
>>>                                        General Purpose Logging supported.
>>> Short self-test routine
>>> recommended polling time:        (   2) minutes.
>>> Extended self-test routine
>>> recommended polling time:        ( 255) minutes.
>>> Conveyance self-test routine
>>> recommended polling time:        (   5) minutes.
>>> SCT capabilities:              (0x303f) SCT Status supported.
>>>                                        SCT Feature Control supported.
>>>                                        SCT Data Table supported.
>>>
>>> SMART Attributes Data Structure revision number: 16
>>> Vendor Specific SMART Attributes with Thresholds:
>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>>
>>> SMART Error Log Version: 1
>>> No Errors Logged
>>>
>>> SMART Self-test log structure revision number 1
>>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>>> # 1  Short offline       Completed without error       00%      5272         -
>>>
>>> SMART Selective self-test log data structure revision number 1
>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>>    1        0        0  Not_testing
>>>    2        0        0  Not_testing
>>>    3        0        0  Not_testing
>>>    4        0        0  Not_testing
>>>    5        0        0  Not_testing
>>> Selective self-test flags (0x0):
>>>  After scanning selected spans, do NOT read-scan remainder of disk.
>>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>>
>>>
>>>
>>>>>From the errors you show, it seems like one of the disks is dead (sda)
>>> MB> or dying. It could be just a bad PCB (the controller board of the
>>> MB> disk) as it refuses to return SMART data, so you might be able to
>>> MB> rescue data by changing the PCB, if it's that important to have that
>>> MB> disk.
>>>
>>> MB> As for the array, you can run a degraded array by force assembling it:
>>> MB> mdadm -Af /dev/md0
>>> MB> In the command above, mdadm will search on existing disks and
>>> MB> partitions, which of them belongs to an array and assemble that array,
>>> MB> if possible.
>>>
>>> MB> I also suggest you install smartmontools package and run smartctl -a
>>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>>> MB> disks.
>>>
>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>> addendum: when going through the logs I found the reason:
>>>>>
>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>  [...]
>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>  (crash here)
>>>>>
>>>>>
>>>>> RF> hi,
>>>>>
>>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>>
>>>>> RF> the history:
>>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>>> RF> today the system crashed and the raid won't start:
>>>>>
>>>>> RF> OS is Centos 5
>>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>>
>>>>>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>>
>>>>> RF> # cat /proc/mdstat
>>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>>> RF> unused devices: <none>
>>>>>
>>>>> RF> filesystem used on top of md0 is xfs.
>>>>>
>>>>> RF> please advice what to do next and let me know if you need further
>>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>>
>>>>>
>>>>> RF> tnx in advance.
>>>>>
>>>>> RF> --
>>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>> feet, just to be sure.
>>>>> (Eric Allman)
>>>>> ------------------------------------------------------------------------------
>>>>>
>>>>> --
>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>> the body of a message to majordomo@vger.kernel.org
>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>> feet, just to be sure.
>>> (Eric Allman)
>>> ------------------------------------------------------------------------------
>>>
>>>
>
>
>
>
>
> ------------------------------------------------------------------------------
> Unix gives you just enough rope to hang yourself -- and then a couple of more
> feet, just to be sure.
> (Eric Allman)
> ------------------------------------------------------------------------------
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
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       Majed B.
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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re[6]: raid5: cannot start dirty degraded array
  2009-12-23 14:04           ` Majed B.
@ 2009-12-23 14:30             ` Rainer Fuegenstein
  2009-12-23 14:35               ` Majed B.
  2009-12-23 14:49               ` raid5: cannot start dirty degraded array Asdo
  0 siblings, 2 replies; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-23 14:30 UTC (permalink / raw)
  To: Majed B.; +Cc: linux-raid

tnx for the info, in the meantime I did:

mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1

there was no mdadm.conf file, so I had to specify all devices and do a
--force


# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
      4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]

unused devices: <none>

md0 is up :-)

I'm about to start backing up the most important data; when this is
done I assume the proper way to get back to normal again is:

- remove the bad drive from the array: mdadm /dev/md0 -r /dev/sda1
- physically replace sda with a new drive
- add it back: mdadm /dev/md0 -a /dev/sda1
- wait three days for the sync to complete (and keep fingers crossed
that no other drive fails)

big tnx!


MB> sda1 was the only affected member of the array so you should be able
MB> to force-assemble the raid5 array and run it in degraded mode.

MB> mdadm -Af /dev/md0
MB> If that doesn't work for any reason, do this:
MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1

MB> You can note the disk order from the output of mdadm -E

MB> On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>
>> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
>> should have figured this out myself (sorry; currently running in
>> panic mode ;-) )
>>
>> MB> 1 is the partition which most likely you added to the array rather
>> MB> than the whole disk (which is normal).
>>
>> # mdadm -E /dev/sd[a-z]1
>> /dev/sda1:
>>          Magic : a92b4efc
>>        Version : 0.90.00
>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>  Creation Time : Mon Mar 31 13:30:45 2008
>>     Raid Level : raid5
>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>   Raid Devices : 4
>>  Total Devices : 4
>> Preferred Minor : 0
>>
>>    Update Time : Wed Dec 23 02:54:49 2009
>>          State : clean
>>  Active Devices : 4
>> Working Devices : 4
>>  Failed Devices : 0
>>  Spare Devices : 0
>>       Checksum : 6cfa3a64 - correct
>>         Events : 119530
>>
>>         Layout : left-symmetric
>>     Chunk Size : 64K
>>
>>      Number   Major   Minor   RaidDevice State
>> this     2       8        1        2      active sync   /dev/sda1
>>
>>   0     0       8       17        0      active sync   /dev/sdb1
>>   1     1       8       49        1      active sync   /dev/sdd1
>>   2     2       8        1        2      active sync   /dev/sda1
>>   3     3       8       33        3      active sync   /dev/sdc1
>> /dev/sdb1:
>>          Magic : a92b4efc
>>        Version : 0.90.00
>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>  Creation Time : Mon Mar 31 13:30:45 2008
>>     Raid Level : raid5
>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>   Raid Devices : 4
>>  Total Devices : 4
>> Preferred Minor : 0
>>
>>    Update Time : Wed Dec 23 10:07:42 2009
>>          State : active
>>  Active Devices : 3
>> Working Devices : 3
>>  Failed Devices : 1
>>  Spare Devices : 0
>>       Checksum : 6cf8f610 - correct
>>         Events : 130037
>>
>>         Layout : left-symmetric
>>     Chunk Size : 64K
>>
>>      Number   Major   Minor   RaidDevice State
>> this     0       8       17        0      active sync   /dev/sdb1
>>
>>   0     0       8       17        0      active sync   /dev/sdb1
>>   1     1       8       49        1      active sync   /dev/sdd1
>>   2     2       0        0        2      faulty removed
>>   3     3       8       33        3      active sync   /dev/sdc1
>> /dev/sdc1:
>>          Magic : a92b4efc
>>        Version : 0.90.00
>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>  Creation Time : Mon Mar 31 13:30:45 2008
>>     Raid Level : raid5
>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>   Raid Devices : 4
>>  Total Devices : 4
>> Preferred Minor : 0
>>
>>    Update Time : Wed Dec 23 10:07:42 2009
>>          State : active
>>  Active Devices : 3
>> Working Devices : 3
>>  Failed Devices : 1
>>  Spare Devices : 0
>>       Checksum : 6cf8f626 - correct
>>         Events : 130037
>>
>>         Layout : left-symmetric
>>     Chunk Size : 64K
>>
>>      Number   Major   Minor   RaidDevice State
>> this     3       8       33        3      active sync   /dev/sdc1
>>
>>   0     0       8       17        0      active sync   /dev/sdb1
>>   1     1       8       49        1      active sync   /dev/sdd1
>>   2     2       0        0        2      faulty removed
>>   3     3       8       33        3      active sync   /dev/sdc1
>> /dev/sdd1:
>>          Magic : a92b4efc
>>        Version : 0.90.00
>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>  Creation Time : Mon Mar 31 13:30:45 2008
>>     Raid Level : raid5
>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>   Raid Devices : 4
>>  Total Devices : 4
>> Preferred Minor : 0
>>
>>    Update Time : Wed Dec 23 10:07:42 2009
>>          State : active
>>  Active Devices : 3
>> Working Devices : 3
>>  Failed Devices : 1
>>  Spare Devices : 0
>>       Checksum : 6cf8f632 - correct
>>         Events : 130037
>>
>>         Layout : left-symmetric
>>     Chunk Size : 64K
>>
>>      Number   Major   Minor   RaidDevice State
>> this     1       8       49        1      active sync   /dev/sdd1
>>
>>   0     0       8       17        0      active sync   /dev/sdb1
>>   1     1       8       49        1      active sync   /dev/sdd1
>>   2     2       0        0        2      faulty removed
>>   3     3       8       33        3      active sync   /dev/sdc1
>> [root@alfred log]#
>>
>> MB> You've included the smart report of one disk only. I suggest you look
>> MB> at the other disks as well and make sure that they're not reporting
>> MB> any errors. Also, keep in mind that you should run smart test
>> MB> periodically (can be configured) and that if you haven't run any test
>> MB> before, you have to run a long or offline test before making sure that
>> MB> you don't have bad sectors.
>>
>> tnx for the hint, will do that as soon as I got my data back (if ever
>> ...)
>>
>>
>> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>
>>>> MB> Give the output of these:
>>>> MB> mdadm -E /dev/sd[a-z]
>>>>
>>>> ]# mdadm -E /dev/sd[a-z]
>>>> mdadm: No md superblock detected on /dev/sda.
>>>> mdadm: No md superblock detected on /dev/sdb.
>>>> mdadm: No md superblock detected on /dev/sdc.
>>>> mdadm: No md superblock detected on /dev/sdd.
>>>>
>>>> I assume that's not a good sign ?!
>>>>
>>>> sda was powered on and running after the reboot, a smartctl short test
>>>> revealed no errors and smartctl -a also looks unsuspicious (see
>>>> below). the drives are rather new.
>>>>
>>>> guess its more likely to be either a problem of the power supply
>>>> (400W) or communication between controller and disk.
>>>>
>>>> /dev/sdd (before it was replaced) reported the following:
>>>>
>>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>
>>>> (what triggered a re-sync of the array)
>>>>
>>>>
>>>> # smartctl -a /dev/sda
>>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>>>> Home page is http://smartmontools.sourceforge.net/
>>>>
>>>> === START OF INFORMATION SECTION ===
>>>> Device Model:     WDC WD15EADS-00R6B0
>>>> Serial Number:    WD-WCAUP0017818
>>>> Firmware Version: 01.00A01
>>>> User Capacity:    1,500,301,910,016 bytes
>>>> Device is:        Not in smartctl database [for details use: -P showall]
>>>> ATA Version is:   8
>>>> ATA Standard is:  Exact ATA specification draft version not indicated
>>>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>>>> SMART support is: Available - device has SMART capability.
>>>> SMART support is: Enabled
>>>>
>>>> === START OF READ SMART DATA SECTION ===
>>>> SMART overall-health self-assessment test result: PASSED
>>>>
>>>> General SMART Values:
>>>> Offline data collection status:  (0x82) Offline data collection activity
>>>>                                        was completed without error.
>>>>                                        Auto Offline Data Collection: Enabled.
>>>> Self-test execution status:      (   0) The previous self-test routine completed
>>>>                                        without error or no self-test has ever
>>>>                                        been run.
>>>> Total time to complete Offline
>>>> data collection:                 (40800) seconds.
>>>> Offline data collection
>>>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>>>                                        Auto Offline data collection on/off support.
>>>>                                        Suspend Offline collection upon new
>>>>                                        command.
>>>>                                        Offline surface scan supported.
>>>>                                        Self-test supported.
>>>>                                        Conveyance Self-test supported.
>>>>                                        Selective Self-test supported.
>>>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>>>                                        power-saving mode.
>>>>                                        Supports SMART auto save timer.
>>>> Error logging capability:        (0x01) Error logging supported.
>>>>                                        General Purpose Logging supported.
>>>> Short self-test routine
>>>> recommended polling time:        (   2) minutes.
>>>> Extended self-test routine
>>>> recommended polling time:        ( 255) minutes.
>>>> Conveyance self-test routine
>>>> recommended polling time:        (   5) minutes.
>>>> SCT capabilities:              (0x303f) SCT Status supported.
>>>>                                        SCT Feature Control supported.
>>>>                                        SCT Data Table supported.
>>>>
>>>> SMART Attributes Data Structure revision number: 16
>>>> Vendor Specific SMART Attributes with Thresholds:
>>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>>>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>>>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>>>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>>>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>>>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>>>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>>>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>>>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>>>
>>>> SMART Error Log Version: 1
>>>> No Errors Logged
>>>>
>>>> SMART Self-test log structure revision number 1
>>>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>>>> # 1  Short offline       Completed without error       00%      5272         -
>>>>
>>>> SMART Selective self-test log data structure revision number 1
>>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>>>    1        0        0  Not_testing
>>>>    2        0        0  Not_testing
>>>>    3        0        0  Not_testing
>>>>    4        0        0  Not_testing
>>>>    5        0        0  Not_testing
>>>> Selective self-test flags (0x0):
>>>>  After scanning selected spans, do NOT read-scan remainder of disk.
>>>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>>>
>>>>
>>>>
>>>>>>From the errors you show, it seems like one of the disks is dead (sda)
>>>> MB> or dying. It could be just a bad PCB (the controller board of the
>>>> MB> disk) as it refuses to return SMART data, so you might be able to
>>>> MB> rescue data by changing the PCB, if it's that important to have that
>>>> MB> disk.
>>>>
>>>> MB> As for the array, you can run a degraded array by force assembling it:
>>>> MB> mdadm -Af /dev/md0
>>>> MB> In the command above, mdadm will search on existing disks and
>>>> MB> partitions, which of them belongs to an array and assemble that array,
>>>> MB> if possible.
>>>>
>>>> MB> I also suggest you install smartmontools package and run smartctl -a
>>>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>>>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>>>> MB> disks.
>>>>
>>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>> addendum: when going through the logs I found the reason:
>>>>>>
>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>  [...]
>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>  (crash here)
>>>>>>
>>>>>>
>>>>>> RF> hi,
>>>>>>
>>>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>>>
>>>>>> RF> the history:
>>>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>>>> RF> today the system crashed and the raid won't start:
>>>>>>
>>>>>> RF> OS is Centos 5
>>>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>>>
>>>>>>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>>>
>>>>>> RF> # cat /proc/mdstat
>>>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>>>> RF> unused devices: <none>
>>>>>>
>>>>>> RF> filesystem used on top of md0 is xfs.
>>>>>>
>>>>>> RF> please advice what to do next and let me know if you need further
>>>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>>>
>>>>>>
>>>>>> RF> tnx in advance.
>>>>>>
>>>>>> RF> --
>>>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>> feet, just to be sure.
>>>>>> (Eric Allman)
>>>>>> ------------------------------------------------------------------------------
>>>>>>
>>>>>> --
>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>> feet, just to be sure.
>>>> (Eric Allman)
>>>> ------------------------------------------------------------------------------
>>>>
>>>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>> feet, just to be sure.
>> (Eric Allman)
>> ------------------------------------------------------------------------------
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>





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Unix gives you just enough rope to hang yourself -- and then a couple of more 
feet, just to be sure.
(Eric Allman)
------------------------------------------------------------------------------

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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Re[6]: raid5: cannot start dirty degraded array
  2009-12-23 14:30             ` Re[6]: " Rainer Fuegenstein
@ 2009-12-23 14:35               ` Majed B.
  2009-12-23 15:13                 ` Re[8]: " Rainer Fuegenstein
  2009-12-23 14:49               ` raid5: cannot start dirty degraded array Asdo
  1 sibling, 1 reply; 18+ messages in thread
From: Majed B. @ 2009-12-23 14:35 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

You didn't have to specify sda1 during the assemble since you do NOT
want it part of the array (because it's dirty and faulty).

I don't know why your array takes 3 days to resync. My array is 7TB in
side (8x1TB @ RAID5) and it takes about 16 hours.

Check the value of this file:
cat /proc/sys/dev/raid/speed_limit_max

Make it a high number so that when there's no process querying the
disks, the resync process will go for the max speed.
echo '200000' > /proc/sys/dev/raid/speed_limit_max
(200 MB/s)

The file /proc/sys/dev/raid/speed_limit_min specified the minimum
speed at which the array should resync, even when there are other
programs querying the disks.

Make sure you run the above changes just before you issue a resync.
Changes are lost on reboot.

On Wed, Dec 23, 2009 at 5:30 PM, Rainer Fuegenstein
<rfu@kaneda.iguw.tuwien.ac.at> wrote:
> tnx for the info, in the meantime I did:
>
> mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
>
> there was no mdadm.conf file, so I had to specify all devices and do a
> --force
>
>
> # cat /proc/mdstat
> Personalities : [raid6] [raid5] [raid4]
> md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
>      4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]
>
> unused devices: <none>
>
> md0 is up :-)
>
> I'm about to start backing up the most important data; when this is
> done I assume the proper way to get back to normal again is:
>
> - remove the bad drive from the array: mdadm /dev/md0 -r /dev/sda1
> - physically replace sda with a new drive
> - add it back: mdadm /dev/md0 -a /dev/sda1
> - wait three days for the sync to complete (and keep fingers crossed
> that no other drive fails)
>
> big tnx!
>
>
> MB> sda1 was the only affected member of the array so you should be able
> MB> to force-assemble the raid5 array and run it in degraded mode.
>
> MB> mdadm -Af /dev/md0
> MB> If that doesn't work for any reason, do this:
> MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1
>
> MB> You can note the disk order from the output of mdadm -E
>
> MB> On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>
>>> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
>>> should have figured this out myself (sorry; currently running in
>>> panic mode ;-) )
>>>
>>> MB> 1 is the partition which most likely you added to the array rather
>>> MB> than the whole disk (which is normal).
>>>
>>> # mdadm -E /dev/sd[a-z]1
>>> /dev/sda1:
>>>          Magic : a92b4efc
>>>        Version : 0.90.00
>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>     Raid Level : raid5
>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>   Raid Devices : 4
>>>  Total Devices : 4
>>> Preferred Minor : 0
>>>
>>>    Update Time : Wed Dec 23 02:54:49 2009
>>>          State : clean
>>>  Active Devices : 4
>>> Working Devices : 4
>>>  Failed Devices : 0
>>>  Spare Devices : 0
>>>       Checksum : 6cfa3a64 - correct
>>>         Events : 119530
>>>
>>>         Layout : left-symmetric
>>>     Chunk Size : 64K
>>>
>>>      Number   Major   Minor   RaidDevice State
>>> this     2       8        1        2      active sync   /dev/sda1
>>>
>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>   2     2       8        1        2      active sync   /dev/sda1
>>>   3     3       8       33        3      active sync   /dev/sdc1
>>> /dev/sdb1:
>>>          Magic : a92b4efc
>>>        Version : 0.90.00
>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>     Raid Level : raid5
>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>   Raid Devices : 4
>>>  Total Devices : 4
>>> Preferred Minor : 0
>>>
>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>          State : active
>>>  Active Devices : 3
>>> Working Devices : 3
>>>  Failed Devices : 1
>>>  Spare Devices : 0
>>>       Checksum : 6cf8f610 - correct
>>>         Events : 130037
>>>
>>>         Layout : left-symmetric
>>>     Chunk Size : 64K
>>>
>>>      Number   Major   Minor   RaidDevice State
>>> this     0       8       17        0      active sync   /dev/sdb1
>>>
>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>   2     2       0        0        2      faulty removed
>>>   3     3       8       33        3      active sync   /dev/sdc1
>>> /dev/sdc1:
>>>          Magic : a92b4efc
>>>        Version : 0.90.00
>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>     Raid Level : raid5
>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>   Raid Devices : 4
>>>  Total Devices : 4
>>> Preferred Minor : 0
>>>
>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>          State : active
>>>  Active Devices : 3
>>> Working Devices : 3
>>>  Failed Devices : 1
>>>  Spare Devices : 0
>>>       Checksum : 6cf8f626 - correct
>>>         Events : 130037
>>>
>>>         Layout : left-symmetric
>>>     Chunk Size : 64K
>>>
>>>      Number   Major   Minor   RaidDevice State
>>> this     3       8       33        3      active sync   /dev/sdc1
>>>
>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>   2     2       0        0        2      faulty removed
>>>   3     3       8       33        3      active sync   /dev/sdc1
>>> /dev/sdd1:
>>>          Magic : a92b4efc
>>>        Version : 0.90.00
>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>     Raid Level : raid5
>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>   Raid Devices : 4
>>>  Total Devices : 4
>>> Preferred Minor : 0
>>>
>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>          State : active
>>>  Active Devices : 3
>>> Working Devices : 3
>>>  Failed Devices : 1
>>>  Spare Devices : 0
>>>       Checksum : 6cf8f632 - correct
>>>         Events : 130037
>>>
>>>         Layout : left-symmetric
>>>     Chunk Size : 64K
>>>
>>>      Number   Major   Minor   RaidDevice State
>>> this     1       8       49        1      active sync   /dev/sdd1
>>>
>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>   2     2       0        0        2      faulty removed
>>>   3     3       8       33        3      active sync   /dev/sdc1
>>> [root@alfred log]#
>>>
>>> MB> You've included the smart report of one disk only. I suggest you look
>>> MB> at the other disks as well and make sure that they're not reporting
>>> MB> any errors. Also, keep in mind that you should run smart test
>>> MB> periodically (can be configured) and that if you haven't run any test
>>> MB> before, you have to run a long or offline test before making sure that
>>> MB> you don't have bad sectors.
>>>
>>> tnx for the hint, will do that as soon as I got my data back (if ever
>>> ...)
>>>
>>>
>>> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>
>>>>> MB> Give the output of these:
>>>>> MB> mdadm -E /dev/sd[a-z]
>>>>>
>>>>> ]# mdadm -E /dev/sd[a-z]
>>>>> mdadm: No md superblock detected on /dev/sda.
>>>>> mdadm: No md superblock detected on /dev/sdb.
>>>>> mdadm: No md superblock detected on /dev/sdc.
>>>>> mdadm: No md superblock detected on /dev/sdd.
>>>>>
>>>>> I assume that's not a good sign ?!
>>>>>
>>>>> sda was powered on and running after the reboot, a smartctl short test
>>>>> revealed no errors and smartctl -a also looks unsuspicious (see
>>>>> below). the drives are rather new.
>>>>>
>>>>> guess its more likely to be either a problem of the power supply
>>>>> (400W) or communication between controller and disk.
>>>>>
>>>>> /dev/sdd (before it was replaced) reported the following:
>>>>>
>>>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>
>>>>> (what triggered a re-sync of the array)
>>>>>
>>>>>
>>>>> # smartctl -a /dev/sda
>>>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>>>>> Home page is http://smartmontools.sourceforge.net/
>>>>>
>>>>> === START OF INFORMATION SECTION ===
>>>>> Device Model:     WDC WD15EADS-00R6B0
>>>>> Serial Number:    WD-WCAUP0017818
>>>>> Firmware Version: 01.00A01
>>>>> User Capacity:    1,500,301,910,016 bytes
>>>>> Device is:        Not in smartctl database [for details use: -P showall]
>>>>> ATA Version is:   8
>>>>> ATA Standard is:  Exact ATA specification draft version not indicated
>>>>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>>>>> SMART support is: Available - device has SMART capability.
>>>>> SMART support is: Enabled
>>>>>
>>>>> === START OF READ SMART DATA SECTION ===
>>>>> SMART overall-health self-assessment test result: PASSED
>>>>>
>>>>> General SMART Values:
>>>>> Offline data collection status:  (0x82) Offline data collection activity
>>>>>                                        was completed without error.
>>>>>                                        Auto Offline Data Collection: Enabled.
>>>>> Self-test execution status:      (   0) The previous self-test routine completed
>>>>>                                        without error or no self-test has ever
>>>>>                                        been run.
>>>>> Total time to complete Offline
>>>>> data collection:                 (40800) seconds.
>>>>> Offline data collection
>>>>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>>>>                                        Auto Offline data collection on/off support.
>>>>>                                        Suspend Offline collection upon new
>>>>>                                        command.
>>>>>                                        Offline surface scan supported.
>>>>>                                        Self-test supported.
>>>>>                                        Conveyance Self-test supported.
>>>>>                                        Selective Self-test supported.
>>>>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>>>>                                        power-saving mode.
>>>>>                                        Supports SMART auto save timer.
>>>>> Error logging capability:        (0x01) Error logging supported.
>>>>>                                        General Purpose Logging supported.
>>>>> Short self-test routine
>>>>> recommended polling time:        (   2) minutes.
>>>>> Extended self-test routine
>>>>> recommended polling time:        ( 255) minutes.
>>>>> Conveyance self-test routine
>>>>> recommended polling time:        (   5) minutes.
>>>>> SCT capabilities:              (0x303f) SCT Status supported.
>>>>>                                        SCT Feature Control supported.
>>>>>                                        SCT Data Table supported.
>>>>>
>>>>> SMART Attributes Data Structure revision number: 16
>>>>> Vendor Specific SMART Attributes with Thresholds:
>>>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>>>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>>>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>>>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>>>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>>>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>>>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>>>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>>>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>>>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>>>>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>>>>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>>>>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>>>>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>>>>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>>>>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>>>>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>>>>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>>>>
>>>>> SMART Error Log Version: 1
>>>>> No Errors Logged
>>>>>
>>>>> SMART Self-test log structure revision number 1
>>>>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>>>>> # 1  Short offline       Completed without error       00%      5272         -
>>>>>
>>>>> SMART Selective self-test log data structure revision number 1
>>>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>>>>    1        0        0  Not_testing
>>>>>    2        0        0  Not_testing
>>>>>    3        0        0  Not_testing
>>>>>    4        0        0  Not_testing
>>>>>    5        0        0  Not_testing
>>>>> Selective self-test flags (0x0):
>>>>>  After scanning selected spans, do NOT read-scan remainder of disk.
>>>>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>>>>
>>>>>
>>>>>
>>>>>>>From the errors you show, it seems like one of the disks is dead (sda)
>>>>> MB> or dying. It could be just a bad PCB (the controller board of the
>>>>> MB> disk) as it refuses to return SMART data, so you might be able to
>>>>> MB> rescue data by changing the PCB, if it's that important to have that
>>>>> MB> disk.
>>>>>
>>>>> MB> As for the array, you can run a degraded array by force assembling it:
>>>>> MB> mdadm -Af /dev/md0
>>>>> MB> In the command above, mdadm will search on existing disks and
>>>>> MB> partitions, which of them belongs to an array and assemble that array,
>>>>> MB> if possible.
>>>>>
>>>>> MB> I also suggest you install smartmontools package and run smartctl -a
>>>>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>>>>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>>>>> MB> disks.
>>>>>
>>>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>> addendum: when going through the logs I found the reason:
>>>>>>>
>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>  [...]
>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>  (crash here)
>>>>>>>
>>>>>>>
>>>>>>> RF> hi,
>>>>>>>
>>>>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>>>>
>>>>>>> RF> the history:
>>>>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>>>>> RF> today the system crashed and the raid won't start:
>>>>>>>
>>>>>>> RF> OS is Centos 5
>>>>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>>>>
>>>>>>>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>>>>
>>>>>>> RF> # cat /proc/mdstat
>>>>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>>>>> RF> unused devices: <none>
>>>>>>>
>>>>>>> RF> filesystem used on top of md0 is xfs.
>>>>>>>
>>>>>>> RF> please advice what to do next and let me know if you need further
>>>>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>>>>
>>>>>>>
>>>>>>> RF> tnx in advance.
>>>>>>>
>>>>>>> RF> --
>>>>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>
>>>>>>>
>>>>>>> ------------------------------------------------------------------------------
>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>> feet, just to be sure.
>>>>>>> (Eric Allman)
>>>>>>> ------------------------------------------------------------------------------
>>>>>>>
>>>>>>> --
>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>> feet, just to be sure.
>>>>> (Eric Allman)
>>>>> ------------------------------------------------------------------------------
>>>>>
>>>>>
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>> feet, just to be sure.
>>> (Eric Allman)
>>> ------------------------------------------------------------------------------
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>
>
>
>
>
> ------------------------------------------------------------------------------
> Unix gives you just enough rope to hang yourself -- and then a couple of more
> feet, just to be sure.
> (Eric Allman)
> ------------------------------------------------------------------------------
>
>



-- 
       Majed B.
--
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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re[8]: raid5: cannot start dirty degraded array
  2009-12-23 14:35               ` Majed B.
@ 2009-12-23 15:13                 ` Rainer Fuegenstein
  2009-12-23 15:16                   ` Majed B.
  0 siblings, 1 reply; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-23 15:13 UTC (permalink / raw)
  To: Majed B.; +Cc: linux-raid


MB> I don't know why your array takes 3 days to resync. My array is 7TB in
MB> side (8x1TB @ RAID5) and it takes about 16 hours.

that's definitely a big mystery. I put this to this list some time ago
when upgrading the same array from 4*750GB to 4*1500GB by replacing
one disk after the other and finally --growing the raid:

1st disk took just a few minutes
2nd disk some hours
3rd disk more than a day
4th disk about 2+ days
--grow also took  2+ days

MB> Check the value of this file:
MB> cat /proc/sys/dev/raid/speed_limit_max

default values are:
[root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_max
200000
[root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_min
1000

when resyncing (with these default values), the server becomes awfuly
slow (streaming mp3 via smb suffers timeouts).

mainboard is an Asus M2N with NFORCE-MCP61 chipset.

this server started on an 800MHz asus board with 4*400 GB PATA disks
and had this one-disk-failure from the start (every few months). over the
years everything was replaced (power supply, mainboard, disks,
controller, pata to sata, ...) but it still kicks out disks (with the
current asus M2N board about every two to three weeks).

must be cosmic radiation to blame ...


MB> Make it a high number so that when there's no process querying the
MB> disks, the resync process will go for the max speed.
echo '200000' >> /proc/sys/dev/raid/speed_limit_max
MB> (200 MB/s)

MB> The file /proc/sys/dev/raid/speed_limit_min specified the minimum
MB> speed at which the array should resync, even when there are other
MB> programs querying the disks.

MB> Make sure you run the above changes just before you issue a resync.
MB> Changes are lost on reboot.

MB> On Wed, Dec 23, 2009 at 5:30 PM, Rainer Fuegenstein
MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>> tnx for the info, in the meantime I did:
>>
>> mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
>>
>> there was no mdadm.conf file, so I had to specify all devices and do a
>> --force
>>
>>
>> # cat /proc/mdstat
>> Personalities : [raid6] [raid5] [raid4]
>> md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
>>      4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]
>>
>> unused devices: <none>
>>
>> md0 is up :-)
>>
>> I'm about to start backing up the most important data; when this is
>> done I assume the proper way to get back to normal again is:
>>
>> - remove the bad drive from the array: mdadm /dev/md0 -r /dev/sda1
>> - physically replace sda with a new drive
>> - add it back: mdadm /dev/md0 -a /dev/sda1
>> - wait three days for the sync to complete (and keep fingers crossed
>> that no other drive fails)
>>
>> big tnx!
>>
>>
>> MB> sda1 was the only affected member of the array so you should be able
>> MB> to force-assemble the raid5 array and run it in degraded mode.
>>
>> MB> mdadm -Af /dev/md0
>> MB> If that doesn't work for any reason, do this:
>> MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1
>>
>> MB> You can note the disk order from the output of mdadm -E
>>
>> MB> On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>
>>>> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
>>>> should have figured this out myself (sorry; currently running in
>>>> panic mode ;-) )
>>>>
>>>> MB> 1 is the partition which most likely you added to the array rather
>>>> MB> than the whole disk (which is normal).
>>>>
>>>> # mdadm -E /dev/sd[a-z]1
>>>> /dev/sda1:
>>>>          Magic : a92b4efc
>>>>        Version : 0.90.00
>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>     Raid Level : raid5
>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>   Raid Devices : 4
>>>>  Total Devices : 4
>>>> Preferred Minor : 0
>>>>
>>>>    Update Time : Wed Dec 23 02:54:49 2009
>>>>          State : clean
>>>>  Active Devices : 4
>>>> Working Devices : 4
>>>>  Failed Devices : 0
>>>>  Spare Devices : 0
>>>>       Checksum : 6cfa3a64 - correct
>>>>         Events : 119530
>>>>
>>>>         Layout : left-symmetric
>>>>     Chunk Size : 64K
>>>>
>>>>      Number   Major   Minor   RaidDevice State
>>>> this     2       8        1        2      active sync   /dev/sda1
>>>>
>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>   2     2       8        1        2      active sync   /dev/sda1
>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>> /dev/sdb1:
>>>>          Magic : a92b4efc
>>>>        Version : 0.90.00
>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>     Raid Level : raid5
>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>   Raid Devices : 4
>>>>  Total Devices : 4
>>>> Preferred Minor : 0
>>>>
>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>          State : active
>>>>  Active Devices : 3
>>>> Working Devices : 3
>>>>  Failed Devices : 1
>>>>  Spare Devices : 0
>>>>       Checksum : 6cf8f610 - correct
>>>>         Events : 130037
>>>>
>>>>         Layout : left-symmetric
>>>>     Chunk Size : 64K
>>>>
>>>>      Number   Major   Minor   RaidDevice State
>>>> this     0       8       17        0      active sync   /dev/sdb1
>>>>
>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>   2     2       0        0        2      faulty removed
>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>> /dev/sdc1:
>>>>          Magic : a92b4efc
>>>>        Version : 0.90.00
>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>     Raid Level : raid5
>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>   Raid Devices : 4
>>>>  Total Devices : 4
>>>> Preferred Minor : 0
>>>>
>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>          State : active
>>>>  Active Devices : 3
>>>> Working Devices : 3
>>>>  Failed Devices : 1
>>>>  Spare Devices : 0
>>>>       Checksum : 6cf8f626 - correct
>>>>         Events : 130037
>>>>
>>>>         Layout : left-symmetric
>>>>     Chunk Size : 64K
>>>>
>>>>      Number   Major   Minor   RaidDevice State
>>>> this     3       8       33        3      active sync   /dev/sdc1
>>>>
>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>   2     2       0        0        2      faulty removed
>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>> /dev/sdd1:
>>>>          Magic : a92b4efc
>>>>        Version : 0.90.00
>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>     Raid Level : raid5
>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>   Raid Devices : 4
>>>>  Total Devices : 4
>>>> Preferred Minor : 0
>>>>
>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>          State : active
>>>>  Active Devices : 3
>>>> Working Devices : 3
>>>>  Failed Devices : 1
>>>>  Spare Devices : 0
>>>>       Checksum : 6cf8f632 - correct
>>>>         Events : 130037
>>>>
>>>>         Layout : left-symmetric
>>>>     Chunk Size : 64K
>>>>
>>>>      Number   Major   Minor   RaidDevice State
>>>> this     1       8       49        1      active sync   /dev/sdd1
>>>>
>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>   2     2       0        0        2      faulty removed
>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>> [root@alfred log]#
>>>>
>>>> MB> You've included the smart report of one disk only. I suggest you look
>>>> MB> at the other disks as well and make sure that they're not reporting
>>>> MB> any errors. Also, keep in mind that you should run smart test
>>>> MB> periodically (can be configured) and that if you haven't run any test
>>>> MB> before, you have to run a long or offline test before making sure that
>>>> MB> you don't have bad sectors.
>>>>
>>>> tnx for the hint, will do that as soon as I got my data back (if ever
>>>> ...)
>>>>
>>>>
>>>> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>
>>>>>> MB> Give the output of these:
>>>>>> MB> mdadm -E /dev/sd[a-z]
>>>>>>
>>>>>> ]# mdadm -E /dev/sd[a-z]
>>>>>> mdadm: No md superblock detected on /dev/sda.
>>>>>> mdadm: No md superblock detected on /dev/sdb.
>>>>>> mdadm: No md superblock detected on /dev/sdc.
>>>>>> mdadm: No md superblock detected on /dev/sdd.
>>>>>>
>>>>>> I assume that's not a good sign ?!
>>>>>>
>>>>>> sda was powered on and running after the reboot, a smartctl short test
>>>>>> revealed no errors and smartctl -a also looks unsuspicious (see
>>>>>> below). the drives are rather new.
>>>>>>
>>>>>> guess its more likely to be either a problem of the power supply
>>>>>> (400W) or communication between controller and disk.
>>>>>>
>>>>>> /dev/sdd (before it was replaced) reported the following:
>>>>>>
>>>>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>
>>>>>> (what triggered a re-sync of the array)
>>>>>>
>>>>>>
>>>>>> # smartctl -a /dev/sda
>>>>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>>>>>> Home page is http://smartmontools.sourceforge.net/
>>>>>>
>>>>>> === START OF INFORMATION SECTION ===
>>>>>> Device Model:     WDC WD15EADS-00R6B0
>>>>>> Serial Number:    WD-WCAUP0017818
>>>>>> Firmware Version: 01.00A01
>>>>>> User Capacity:    1,500,301,910,016 bytes
>>>>>> Device is:        Not in smartctl database [for details use: -P showall]
>>>>>> ATA Version is:   8
>>>>>> ATA Standard is:  Exact ATA specification draft version not indicated
>>>>>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>>>>>> SMART support is: Available - device has SMART capability.
>>>>>> SMART support is: Enabled
>>>>>>
>>>>>> === START OF READ SMART DATA SECTION ===
>>>>>> SMART overall-health self-assessment test result: PASSED
>>>>>>
>>>>>> General SMART Values:
>>>>>> Offline data collection status:  (0x82) Offline data collection activity
>>>>>>                                        was completed without error.
>>>>>>                                        Auto Offline Data Collection: Enabled.
>>>>>> Self-test execution status:      (   0) The previous self-test routine completed
>>>>>>                                        without error or no self-test has ever
>>>>>>                                        been run.
>>>>>> Total time to complete Offline
>>>>>> data collection:                 (40800) seconds.
>>>>>> Offline data collection
>>>>>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>>>>>                                        Auto Offline data collection on/off support.
>>>>>>                                        Suspend Offline collection upon new
>>>>>>                                        command.
>>>>>>                                        Offline surface scan supported.
>>>>>>                                        Self-test supported.
>>>>>>                                        Conveyance Self-test supported.
>>>>>>                                        Selective Self-test supported.
>>>>>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>>>>>                                        power-saving mode.
>>>>>>                                        Supports SMART auto save timer.
>>>>>> Error logging capability:        (0x01) Error logging supported.
>>>>>>                                        General Purpose Logging supported.
>>>>>> Short self-test routine
>>>>>> recommended polling time:        (   2) minutes.
>>>>>> Extended self-test routine
>>>>>> recommended polling time:        ( 255) minutes.
>>>>>> Conveyance self-test routine
>>>>>> recommended polling time:        (   5) minutes.
>>>>>> SCT capabilities:              (0x303f) SCT Status supported.
>>>>>>                                        SCT Feature Control supported.
>>>>>>                                        SCT Data Table supported.
>>>>>>
>>>>>> SMART Attributes Data Structure revision number: 16
>>>>>> Vendor Specific SMART Attributes with Thresholds:
>>>>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>>>>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>>>>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>>>>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>>>>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>>>>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>>>>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>>>>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>>>>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>>>>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>>>>>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>>>>>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>>>>>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>>>>>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>>>>>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>>>>>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>>>>>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>>>>>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>>>>>
>>>>>> SMART Error Log Version: 1
>>>>>> No Errors Logged
>>>>>>
>>>>>> SMART Self-test log structure revision number 1
>>>>>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>>>>>> # 1  Short offline       Completed without error       00%      5272         -
>>>>>>
>>>>>> SMART Selective self-test log data structure revision number 1
>>>>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>>>>>    1        0        0  Not_testing
>>>>>>    2        0        0  Not_testing
>>>>>>    3        0        0  Not_testing
>>>>>>    4        0        0  Not_testing
>>>>>>    5        0        0  Not_testing
>>>>>> Selective self-test flags (0x0):
>>>>>>  After scanning selected spans, do NOT read-scan remainder of disk.
>>>>>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>From the errors you show, it seems like one of the disks is dead (sda)
>>>>>> MB> or dying. It could be just a bad PCB (the controller board of the
>>>>>> MB> disk) as it refuses to return SMART data, so you might be able to
>>>>>> MB> rescue data by changing the PCB, if it's that important to have that
>>>>>> MB> disk.
>>>>>>
>>>>>> MB> As for the array, you can run a degraded array by force assembling it:
>>>>>> MB> mdadm -Af /dev/md0
>>>>>> MB> In the command above, mdadm will search on existing disks and
>>>>>> MB> partitions, which of them belongs to an array and assemble that array,
>>>>>> MB> if possible.
>>>>>>
>>>>>> MB> I also suggest you install smartmontools package and run smartctl -a
>>>>>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>>>>>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>>>>>> MB> disks.
>>>>>>
>>>>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>> addendum: when going through the logs I found the reason:
>>>>>>>>
>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>>>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>>>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>>>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>>>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>>>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>>>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>  [...]
>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>  (crash here)
>>>>>>>>
>>>>>>>>
>>>>>>>> RF> hi,
>>>>>>>>
>>>>>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>>>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>>>>>
>>>>>>>> RF> the history:
>>>>>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>>>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>>>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>>>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>>>>>> RF> today the system crashed and the raid won't start:
>>>>>>>>
>>>>>>>> RF> OS is Centos 5
>>>>>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>>>>>
>>>>>>>>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>>>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>>>>>
>>>>>>>> RF> # cat /proc/mdstat
>>>>>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>>>>>> RF> unused devices: <none>
>>>>>>>>
>>>>>>>> RF> filesystem used on top of md0 is xfs.
>>>>>>>>
>>>>>>>> RF> please advice what to do next and let me know if you need further
>>>>>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>>>>>
>>>>>>>>
>>>>>>>> RF> tnx in advance.
>>>>>>>>
>>>>>>>> RF> --
>>>>>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>>>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>
>>>>>>>>
>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>>> feet, just to be sure.
>>>>>>>> (Eric Allman)
>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>
>>>>>>>> --
>>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>> feet, just to be sure.
>>>>>> (Eric Allman)
>>>>>> ------------------------------------------------------------------------------
>>>>>>
>>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>> feet, just to be sure.
>>>> (Eric Allman)
>>>> ------------------------------------------------------------------------------
>>>>
>>>> --
>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>> the body of a message to majordomo@vger.kernel.org
>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
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>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>> feet, just to be sure.
>> (Eric Allman)
>> ------------------------------------------------------------------------------
>>
>>





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Unix gives you just enough rope to hang yourself -- and then a couple of more 
feet, just to be sure.
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^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: Re[8]: raid5: cannot start dirty degraded array
  2009-12-23 15:13                 ` Re[8]: " Rainer Fuegenstein
@ 2009-12-23 15:16                   ` Majed B.
  2009-12-23 17:03                     ` Re[10]: " Rainer Fuegenstein
  0 siblings, 1 reply; 18+ messages in thread
From: Majed B. @ 2009-12-23 15:16 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

Is the disk being kicked always on the same port? (port 1 for example)

If so, then you may have a problem with that specific port. If it
kicks disks randomly, and you're sure that your cables or disks are
healthy, then it's probably time to change the motherboard.

Increasing the resync values of min will slow down your server if
you're trying to access it during a resync.

On Wed, Dec 23, 2009 at 6:13 PM, Rainer Fuegenstein
<rfu@kaneda.iguw.tuwien.ac.at> wrote:
>
> MB> I don't know why your array takes 3 days to resync. My array is 7TB in
> MB> side (8x1TB @ RAID5) and it takes about 16 hours.
>
> that's definitely a big mystery. I put this to this list some time ago
> when upgrading the same array from 4*750GB to 4*1500GB by replacing
> one disk after the other and finally --growing the raid:
>
> 1st disk took just a few minutes
> 2nd disk some hours
> 3rd disk more than a day
> 4th disk about 2+ days
> --grow also took  2+ days
>
> MB> Check the value of this file:
> MB> cat /proc/sys/dev/raid/speed_limit_max
>
> default values are:
> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_max
> 200000
> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_min
> 1000
>
> when resyncing (with these default values), the server becomes awfuly
> slow (streaming mp3 via smb suffers timeouts).
>
> mainboard is an Asus M2N with NFORCE-MCP61 chipset.
>
> this server started on an 800MHz asus board with 4*400 GB PATA disks
> and had this one-disk-failure from the start (every few months). over the
> years everything was replaced (power supply, mainboard, disks,
> controller, pata to sata, ...) but it still kicks out disks (with the
> current asus M2N board about every two to three weeks).
>
> must be cosmic radiation to blame ...
>
>
> MB> Make it a high number so that when there's no process querying the
> MB> disks, the resync process will go for the max speed.
> echo '200000' >> /proc/sys/dev/raid/speed_limit_max
> MB> (200 MB/s)
>
> MB> The file /proc/sys/dev/raid/speed_limit_min specified the minimum
> MB> speed at which the array should resync, even when there are other
> MB> programs querying the disks.
>
> MB> Make sure you run the above changes just before you issue a resync.
> MB> Changes are lost on reboot.
>
> MB> On Wed, Dec 23, 2009 at 5:30 PM, Rainer Fuegenstein
> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>> tnx for the info, in the meantime I did:
>>>
>>> mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
>>>
>>> there was no mdadm.conf file, so I had to specify all devices and do a
>>> --force
>>>
>>>
>>> # cat /proc/mdstat
>>> Personalities : [raid6] [raid5] [raid4]
>>> md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
>>>      4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]
>>>
>>> unused devices: <none>
>>>
>>> md0 is up :-)
>>>
>>> I'm about to start backing up the most important data; when this is
>>> done I assume the proper way to get back to normal again is:
>>>
>>> - remove the bad drive from the array: mdadm /dev/md0 -r /dev/sda1
>>> - physically replace sda with a new drive
>>> - add it back: mdadm /dev/md0 -a /dev/sda1
>>> - wait three days for the sync to complete (and keep fingers crossed
>>> that no other drive fails)
>>>
>>> big tnx!
>>>
>>>
>>> MB> sda1 was the only affected member of the array so you should be able
>>> MB> to force-assemble the raid5 array and run it in degraded mode.
>>>
>>> MB> mdadm -Af /dev/md0
>>> MB> If that doesn't work for any reason, do this:
>>> MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1
>>>
>>> MB> You can note the disk order from the output of mdadm -E
>>>
>>> MB> On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>
>>>>> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
>>>>> should have figured this out myself (sorry; currently running in
>>>>> panic mode ;-) )
>>>>>
>>>>> MB> 1 is the partition which most likely you added to the array rather
>>>>> MB> than the whole disk (which is normal).
>>>>>
>>>>> # mdadm -E /dev/sd[a-z]1
>>>>> /dev/sda1:
>>>>>          Magic : a92b4efc
>>>>>        Version : 0.90.00
>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>     Raid Level : raid5
>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>   Raid Devices : 4
>>>>>  Total Devices : 4
>>>>> Preferred Minor : 0
>>>>>
>>>>>    Update Time : Wed Dec 23 02:54:49 2009
>>>>>          State : clean
>>>>>  Active Devices : 4
>>>>> Working Devices : 4
>>>>>  Failed Devices : 0
>>>>>  Spare Devices : 0
>>>>>       Checksum : 6cfa3a64 - correct
>>>>>         Events : 119530
>>>>>
>>>>>         Layout : left-symmetric
>>>>>     Chunk Size : 64K
>>>>>
>>>>>      Number   Major   Minor   RaidDevice State
>>>>> this     2       8        1        2      active sync   /dev/sda1
>>>>>
>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>   2     2       8        1        2      active sync   /dev/sda1
>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>> /dev/sdb1:
>>>>>          Magic : a92b4efc
>>>>>        Version : 0.90.00
>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>     Raid Level : raid5
>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>   Raid Devices : 4
>>>>>  Total Devices : 4
>>>>> Preferred Minor : 0
>>>>>
>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>          State : active
>>>>>  Active Devices : 3
>>>>> Working Devices : 3
>>>>>  Failed Devices : 1
>>>>>  Spare Devices : 0
>>>>>       Checksum : 6cf8f610 - correct
>>>>>         Events : 130037
>>>>>
>>>>>         Layout : left-symmetric
>>>>>     Chunk Size : 64K
>>>>>
>>>>>      Number   Major   Minor   RaidDevice State
>>>>> this     0       8       17        0      active sync   /dev/sdb1
>>>>>
>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>   2     2       0        0        2      faulty removed
>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>> /dev/sdc1:
>>>>>          Magic : a92b4efc
>>>>>        Version : 0.90.00
>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>     Raid Level : raid5
>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>   Raid Devices : 4
>>>>>  Total Devices : 4
>>>>> Preferred Minor : 0
>>>>>
>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>          State : active
>>>>>  Active Devices : 3
>>>>> Working Devices : 3
>>>>>  Failed Devices : 1
>>>>>  Spare Devices : 0
>>>>>       Checksum : 6cf8f626 - correct
>>>>>         Events : 130037
>>>>>
>>>>>         Layout : left-symmetric
>>>>>     Chunk Size : 64K
>>>>>
>>>>>      Number   Major   Minor   RaidDevice State
>>>>> this     3       8       33        3      active sync   /dev/sdc1
>>>>>
>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>   2     2       0        0        2      faulty removed
>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>> /dev/sdd1:
>>>>>          Magic : a92b4efc
>>>>>        Version : 0.90.00
>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>     Raid Level : raid5
>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>   Raid Devices : 4
>>>>>  Total Devices : 4
>>>>> Preferred Minor : 0
>>>>>
>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>          State : active
>>>>>  Active Devices : 3
>>>>> Working Devices : 3
>>>>>  Failed Devices : 1
>>>>>  Spare Devices : 0
>>>>>       Checksum : 6cf8f632 - correct
>>>>>         Events : 130037
>>>>>
>>>>>         Layout : left-symmetric
>>>>>     Chunk Size : 64K
>>>>>
>>>>>      Number   Major   Minor   RaidDevice State
>>>>> this     1       8       49        1      active sync   /dev/sdd1
>>>>>
>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>   2     2       0        0        2      faulty removed
>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>> [root@alfred log]#
>>>>>
>>>>> MB> You've included the smart report of one disk only. I suggest you look
>>>>> MB> at the other disks as well and make sure that they're not reporting
>>>>> MB> any errors. Also, keep in mind that you should run smart test
>>>>> MB> periodically (can be configured) and that if you haven't run any test
>>>>> MB> before, you have to run a long or offline test before making sure that
>>>>> MB> you don't have bad sectors.
>>>>>
>>>>> tnx for the hint, will do that as soon as I got my data back (if ever
>>>>> ...)
>>>>>
>>>>>
>>>>> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>
>>>>>>> MB> Give the output of these:
>>>>>>> MB> mdadm -E /dev/sd[a-z]
>>>>>>>
>>>>>>> ]# mdadm -E /dev/sd[a-z]
>>>>>>> mdadm: No md superblock detected on /dev/sda.
>>>>>>> mdadm: No md superblock detected on /dev/sdb.
>>>>>>> mdadm: No md superblock detected on /dev/sdc.
>>>>>>> mdadm: No md superblock detected on /dev/sdd.
>>>>>>>
>>>>>>> I assume that's not a good sign ?!
>>>>>>>
>>>>>>> sda was powered on and running after the reboot, a smartctl short test
>>>>>>> revealed no errors and smartctl -a also looks unsuspicious (see
>>>>>>> below). the drives are rather new.
>>>>>>>
>>>>>>> guess its more likely to be either a problem of the power supply
>>>>>>> (400W) or communication between controller and disk.
>>>>>>>
>>>>>>> /dev/sdd (before it was replaced) reported the following:
>>>>>>>
>>>>>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>
>>>>>>> (what triggered a re-sync of the array)
>>>>>>>
>>>>>>>
>>>>>>> # smartctl -a /dev/sda
>>>>>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>>>>>>> Home page is http://smartmontools.sourceforge.net/
>>>>>>>
>>>>>>> === START OF INFORMATION SECTION ===
>>>>>>> Device Model:     WDC WD15EADS-00R6B0
>>>>>>> Serial Number:    WD-WCAUP0017818
>>>>>>> Firmware Version: 01.00A01
>>>>>>> User Capacity:    1,500,301,910,016 bytes
>>>>>>> Device is:        Not in smartctl database [for details use: -P showall]
>>>>>>> ATA Version is:   8
>>>>>>> ATA Standard is:  Exact ATA specification draft version not indicated
>>>>>>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>>>>>>> SMART support is: Available - device has SMART capability.
>>>>>>> SMART support is: Enabled
>>>>>>>
>>>>>>> === START OF READ SMART DATA SECTION ===
>>>>>>> SMART overall-health self-assessment test result: PASSED
>>>>>>>
>>>>>>> General SMART Values:
>>>>>>> Offline data collection status:  (0x82) Offline data collection activity
>>>>>>>                                        was completed without error.
>>>>>>>                                        Auto Offline Data Collection: Enabled.
>>>>>>> Self-test execution status:      (   0) The previous self-test routine completed
>>>>>>>                                        without error or no self-test has ever
>>>>>>>                                        been run.
>>>>>>> Total time to complete Offline
>>>>>>> data collection:                 (40800) seconds.
>>>>>>> Offline data collection
>>>>>>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>>>>>>                                        Auto Offline data collection on/off support.
>>>>>>>                                        Suspend Offline collection upon new
>>>>>>>                                        command.
>>>>>>>                                        Offline surface scan supported.
>>>>>>>                                        Self-test supported.
>>>>>>>                                        Conveyance Self-test supported.
>>>>>>>                                        Selective Self-test supported.
>>>>>>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>>>>>>                                        power-saving mode.
>>>>>>>                                        Supports SMART auto save timer.
>>>>>>> Error logging capability:        (0x01) Error logging supported.
>>>>>>>                                        General Purpose Logging supported.
>>>>>>> Short self-test routine
>>>>>>> recommended polling time:        (   2) minutes.
>>>>>>> Extended self-test routine
>>>>>>> recommended polling time:        ( 255) minutes.
>>>>>>> Conveyance self-test routine
>>>>>>> recommended polling time:        (   5) minutes.
>>>>>>> SCT capabilities:              (0x303f) SCT Status supported.
>>>>>>>                                        SCT Feature Control supported.
>>>>>>>                                        SCT Data Table supported.
>>>>>>>
>>>>>>> SMART Attributes Data Structure revision number: 16
>>>>>>> Vendor Specific SMART Attributes with Thresholds:
>>>>>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>>>>>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>>>>>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>>>>>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>>>>>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>>>>>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>>>>>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>>>>>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>>>>>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>>>>>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>>>>>>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>>>>>>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>>>>>>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>>>>>>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>>>>>>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>>>>>>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>>>>>>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>>>>>>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>>>>>>
>>>>>>> SMART Error Log Version: 1
>>>>>>> No Errors Logged
>>>>>>>
>>>>>>> SMART Self-test log structure revision number 1
>>>>>>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>>>>>>> # 1  Short offline       Completed without error       00%      5272         -
>>>>>>>
>>>>>>> SMART Selective self-test log data structure revision number 1
>>>>>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>>>>>>    1        0        0  Not_testing
>>>>>>>    2        0        0  Not_testing
>>>>>>>    3        0        0  Not_testing
>>>>>>>    4        0        0  Not_testing
>>>>>>>    5        0        0  Not_testing
>>>>>>> Selective self-test flags (0x0):
>>>>>>>  After scanning selected spans, do NOT read-scan remainder of disk.
>>>>>>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>>From the errors you show, it seems like one of the disks is dead (sda)
>>>>>>> MB> or dying. It could be just a bad PCB (the controller board of the
>>>>>>> MB> disk) as it refuses to return SMART data, so you might be able to
>>>>>>> MB> rescue data by changing the PCB, if it's that important to have that
>>>>>>> MB> disk.
>>>>>>>
>>>>>>> MB> As for the array, you can run a degraded array by force assembling it:
>>>>>>> MB> mdadm -Af /dev/md0
>>>>>>> MB> In the command above, mdadm will search on existing disks and
>>>>>>> MB> partitions, which of them belongs to an array and assemble that array,
>>>>>>> MB> if possible.
>>>>>>>
>>>>>>> MB> I also suggest you install smartmontools package and run smartctl -a
>>>>>>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>>>>>>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>>>>>>> MB> disks.
>>>>>>>
>>>>>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>>> addendum: when going through the logs I found the reason:
>>>>>>>>>
>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>>>>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>>>>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>>>>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>>>>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>>>>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>>>>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>  [...]
>>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>  (crash here)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> RF> hi,
>>>>>>>>>
>>>>>>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>>>>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>>>>>>
>>>>>>>>> RF> the history:
>>>>>>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>>>>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>>>>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>>>>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>>>>>>> RF> today the system crashed and the raid won't start:
>>>>>>>>>
>>>>>>>>> RF> OS is Centos 5
>>>>>>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>>>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>>>>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>>>>>>
>>>>>>>>> RF> # cat /proc/mdstat
>>>>>>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>>>>>>> RF> unused devices: <none>
>>>>>>>>>
>>>>>>>>> RF> filesystem used on top of md0 is xfs.
>>>>>>>>>
>>>>>>>>> RF> please advice what to do next and let me know if you need further
>>>>>>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> RF> tnx in advance.
>>>>>>>>>
>>>>>>>>> RF> --
>>>>>>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>>>>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>>>> feet, just to be sure.
>>>>>>>>> (Eric Allman)
>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ------------------------------------------------------------------------------
>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>> feet, just to be sure.
>>>>>>> (Eric Allman)
>>>>>>> ------------------------------------------------------------------------------
>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>> feet, just to be sure.
>>>>> (Eric Allman)
>>>>> ------------------------------------------------------------------------------
>>>>>
>>>>> --
>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>> the body of a message to majordomo@vger.kernel.org
>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>> feet, just to be sure.
>>> (Eric Allman)
>>> ------------------------------------------------------------------------------
>>>
>>>
>
>
>
>
>
> ------------------------------------------------------------------------------
> Unix gives you just enough rope to hang yourself -- and then a couple of more
> feet, just to be sure.
> (Eric Allman)
> ------------------------------------------------------------------------------
>
>



-- 
       Majed B.
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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More majordomo info at  http://vger.kernel.org/majordomo-info.html

^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re[10]: raid5: cannot start dirty degraded array
  2009-12-23 15:16                   ` Majed B.
@ 2009-12-23 17:03                     ` Rainer Fuegenstein
  2009-12-23 18:22                       ` Justin Piszcz
  0 siblings, 1 reply; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-23 17:03 UTC (permalink / raw)
  To: linux-raid


MB> Is the disk being kicked always on the same port? (port 1 for example)

not sure how to interpret the syslog messages:

Nov 28 21:24:40 alfred kernel: ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Nov 28 21:24:40 alfred kernel: ata2.00: cmd b0/da:00:00:4f:c2/00:00:00:00:00/00 tag 0
Nov 28 21:24:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Nov 28 21:24:40 alfred kernel: ata2.00: status: { DRDY }
Nov 28 21:24:40 alfred kernel: ata2: soft resetting link
Nov 28 21:24:41 alfred kernel: ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Nov 28 21:24:41 alfred kernel: ata2.00: configured for UDMA/133
Nov 28 21:24:41 alfred kernel: ata2: EH complete
Nov 28 21:24:41 alfred kernel: SCSI device sdb: 2930277168 512-byte hdwr sectors (1500302 MB)
Nov 28 21:24:41 alfred kernel: sdb: Write Protect is off
Nov 28 21:24:41 alfred kernel: SCSI device sdb: drive cache: write back
Nov 28 21:24:41 alfred smartd[2770]: Device: /dev/sdd, 1 Offline uncorrectable sectors

the smartd message for sdd appears frequently, that's why I replaced
the drive. the timeout above occured 3 times within the last month for
sdb. guess you are right with either the port or the cable.

tonight it was sda, but I might have disturbed the cable without
noticing when replacing sdd.

MB> If so, then you may have a problem with that specific port. If it
MB> kicks disks randomly, and you're sure that your cables or disks are
MB> healthy, then it's probably time to change the motherboard.

I plan to move to the new atom/pinetrail mainboards as soon as they
are available in january. hope that solves this issue. but will check
the cable anyway.

tnx & cu


MB> Increasing the resync values of min will slow down your server if
MB> you're trying to access it during a resync.

MB> On Wed, Dec 23, 2009 at 6:13 PM, Rainer Fuegenstein
MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>
>> MB> I don't know why your array takes 3 days to resync. My array is 7TB in
>> MB> side (8x1TB @ RAID5) and it takes about 16 hours.
>>
>> that's definitely a big mystery. I put this to this list some time ago
>> when upgrading the same array from 4*750GB to 4*1500GB by replacing
>> one disk after the other and finally --growing the raid:
>>
>> 1st disk took just a few minutes
>> 2nd disk some hours
>> 3rd disk more than a day
>> 4th disk about 2+ days
>> --grow also took  2+ days
>>
>> MB> Check the value of this file:
>> MB> cat /proc/sys/dev/raid/speed_limit_max
>>
>> default values are:
>> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_max
>> 200000
>> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_min
>> 1000
>>
>> when resyncing (with these default values), the server becomes awfuly
>> slow (streaming mp3 via smb suffers timeouts).
>>
>> mainboard is an Asus M2N with NFORCE-MCP61 chipset.
>>
>> this server started on an 800MHz asus board with 4*400 GB PATA disks
>> and had this one-disk-failure from the start (every few months). over the
>> years everything was replaced (power supply, mainboard, disks,
>> controller, pata to sata, ...) but it still kicks out disks (with the
>> current asus M2N board about every two to three weeks).
>>
>> must be cosmic radiation to blame ...
>>
>>
>> MB> Make it a high number so that when there's no process querying the
>> MB> disks, the resync process will go for the max speed.
>> echo '200000' >> /proc/sys/dev/raid/speed_limit_max
>> MB> (200 MB/s)
>>
>> MB> The file /proc/sys/dev/raid/speed_limit_min specified the minimum
>> MB> speed at which the array should resync, even when there are other
>> MB> programs querying the disks.
>>
>> MB> Make sure you run the above changes just before you issue a resync.
>> MB> Changes are lost on reboot.
>>
>> MB> On Wed, Dec 23, 2009 at 5:30 PM, Rainer Fuegenstein
>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>> tnx for the info, in the meantime I did:
>>>>
>>>> mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
>>>>
>>>> there was no mdadm.conf file, so I had to specify all devices and do a
>>>> --force
>>>>
>>>>
>>>> # cat /proc/mdstat
>>>> Personalities : [raid6] [raid5] [raid4]
>>>> md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
>>>>      4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]
>>>>
>>>> unused devices: <none>
>>>>
>>>> md0 is up :-)
>>>>
>>>> I'm about to start backing up the most important data; when this is
>>>> done I assume the proper way to get back to normal again is:
>>>>
>>>> - remove the bad drive from the array: mdadm /dev/md0 -r /dev/sda1
>>>> - physically replace sda with a new drive
>>>> - add it back: mdadm /dev/md0 -a /dev/sda1
>>>> - wait three days for the sync to complete (and keep fingers crossed
>>>> that no other drive fails)
>>>>
>>>> big tnx!
>>>>
>>>>
>>>> MB> sda1 was the only affected member of the array so you should be able
>>>> MB> to force-assemble the raid5 array and run it in degraded mode.
>>>>
>>>> MB> mdadm -Af /dev/md0
>>>> MB> If that doesn't work for any reason, do this:
>>>> MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1
>>>>
>>>> MB> You can note the disk order from the output of mdadm -E
>>>>
>>>> MB> On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>
>>>>>> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
>>>>>> should have figured this out myself (sorry; currently running in
>>>>>> panic mode ;-) )
>>>>>>
>>>>>> MB> 1 is the partition which most likely you added to the array rather
>>>>>> MB> than the whole disk (which is normal).
>>>>>>
>>>>>> # mdadm -E /dev/sd[a-z]1
>>>>>> /dev/sda1:
>>>>>>          Magic : a92b4efc
>>>>>>        Version : 0.90.00
>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>     Raid Level : raid5
>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>   Raid Devices : 4
>>>>>>  Total Devices : 4
>>>>>> Preferred Minor : 0
>>>>>>
>>>>>>    Update Time : Wed Dec 23 02:54:49 2009
>>>>>>          State : clean
>>>>>>  Active Devices : 4
>>>>>> Working Devices : 4
>>>>>>  Failed Devices : 0
>>>>>>  Spare Devices : 0
>>>>>>       Checksum : 6cfa3a64 - correct
>>>>>>         Events : 119530
>>>>>>
>>>>>>         Layout : left-symmetric
>>>>>>     Chunk Size : 64K
>>>>>>
>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>> this     2       8        1        2      active sync   /dev/sda1
>>>>>>
>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>   2     2       8        1        2      active sync   /dev/sda1
>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>> /dev/sdb1:
>>>>>>          Magic : a92b4efc
>>>>>>        Version : 0.90.00
>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>     Raid Level : raid5
>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>   Raid Devices : 4
>>>>>>  Total Devices : 4
>>>>>> Preferred Minor : 0
>>>>>>
>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>>          State : active
>>>>>>  Active Devices : 3
>>>>>> Working Devices : 3
>>>>>>  Failed Devices : 1
>>>>>>  Spare Devices : 0
>>>>>>       Checksum : 6cf8f610 - correct
>>>>>>         Events : 130037
>>>>>>
>>>>>>         Layout : left-symmetric
>>>>>>     Chunk Size : 64K
>>>>>>
>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>> this     0       8       17        0      active sync   /dev/sdb1
>>>>>>
>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>   2     2       0        0        2      faulty removed
>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>> /dev/sdc1:
>>>>>>          Magic : a92b4efc
>>>>>>        Version : 0.90.00
>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>     Raid Level : raid5
>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>   Raid Devices : 4
>>>>>>  Total Devices : 4
>>>>>> Preferred Minor : 0
>>>>>>
>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>>          State : active
>>>>>>  Active Devices : 3
>>>>>> Working Devices : 3
>>>>>>  Failed Devices : 1
>>>>>>  Spare Devices : 0
>>>>>>       Checksum : 6cf8f626 - correct
>>>>>>         Events : 130037
>>>>>>
>>>>>>         Layout : left-symmetric
>>>>>>     Chunk Size : 64K
>>>>>>
>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>> this     3       8       33        3      active sync   /dev/sdc1
>>>>>>
>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>   2     2       0        0        2      faulty removed
>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>> /dev/sdd1:
>>>>>>          Magic : a92b4efc
>>>>>>        Version : 0.90.00
>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>     Raid Level : raid5
>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>   Raid Devices : 4
>>>>>>  Total Devices : 4
>>>>>> Preferred Minor : 0
>>>>>>
>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>>          State : active
>>>>>>  Active Devices : 3
>>>>>> Working Devices : 3
>>>>>>  Failed Devices : 1
>>>>>>  Spare Devices : 0
>>>>>>       Checksum : 6cf8f632 - correct
>>>>>>         Events : 130037
>>>>>>
>>>>>>         Layout : left-symmetric
>>>>>>     Chunk Size : 64K
>>>>>>
>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>> this     1       8       49        1      active sync   /dev/sdd1
>>>>>>
>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>   2     2       0        0        2      faulty removed
>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>> [root@alfred log]#
>>>>>>
>>>>>> MB> You've included the smart report of one disk only. I suggest you look
>>>>>> MB> at the other disks as well and make sure that they're not reporting
>>>>>> MB> any errors. Also, keep in mind that you should run smart test
>>>>>> MB> periodically (can be configured) and that if you haven't run any test
>>>>>> MB> before, you have to run a long or offline test before making sure that
>>>>>> MB> you don't have bad sectors.
>>>>>>
>>>>>> tnx for the hint, will do that as soon as I got my data back (if ever
>>>>>> ...)
>>>>>>
>>>>>>
>>>>>> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>>
>>>>>>>> MB> Give the output of these:
>>>>>>>> MB> mdadm -E /dev/sd[a-z]
>>>>>>>>
>>>>>>>> ]# mdadm -E /dev/sd[a-z]
>>>>>>>> mdadm: No md superblock detected on /dev/sda.
>>>>>>>> mdadm: No md superblock detected on /dev/sdb.
>>>>>>>> mdadm: No md superblock detected on /dev/sdc.
>>>>>>>> mdadm: No md superblock detected on /dev/sdd.
>>>>>>>>
>>>>>>>> I assume that's not a good sign ?!
>>>>>>>>
>>>>>>>> sda was powered on and running after the reboot, a smartctl short test
>>>>>>>> revealed no errors and smartctl -a also looks unsuspicious (see
>>>>>>>> below). the drives are rather new.
>>>>>>>>
>>>>>>>> guess its more likely to be either a problem of the power supply
>>>>>>>> (400W) or communication between controller and disk.
>>>>>>>>
>>>>>>>> /dev/sdd (before it was replaced) reported the following:
>>>>>>>>
>>>>>>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>
>>>>>>>> (what triggered a re-sync of the array)
>>>>>>>>
>>>>>>>>
>>>>>>>> # smartctl -a /dev/sda
>>>>>>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>>>>>>>> Home page is http://smartmontools.sourceforge.net/
>>>>>>>>
>>>>>>>> === START OF INFORMATION SECTION ===
>>>>>>>> Device Model:     WDC WD15EADS-00R6B0
>>>>>>>> Serial Number:    WD-WCAUP0017818
>>>>>>>> Firmware Version: 01.00A01
>>>>>>>> User Capacity:    1,500,301,910,016 bytes
>>>>>>>> Device is:        Not in smartctl database [for details use: -P showall]
>>>>>>>> ATA Version is:   8
>>>>>>>> ATA Standard is:  Exact ATA specification draft version not indicated
>>>>>>>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>>>>>>>> SMART support is: Available - device has SMART capability.
>>>>>>>> SMART support is: Enabled
>>>>>>>>
>>>>>>>> === START OF READ SMART DATA SECTION ===
>>>>>>>> SMART overall-health self-assessment test result: PASSED
>>>>>>>>
>>>>>>>> General SMART Values:
>>>>>>>> Offline data collection status:  (0x82) Offline data collection activity
>>>>>>>>                                        was completed without error.
>>>>>>>>                                        Auto Offline Data Collection: Enabled.
>>>>>>>> Self-test execution status:      (   0) The previous self-test routine completed
>>>>>>>>                                        without error or no self-test has ever
>>>>>>>>                                        been run.
>>>>>>>> Total time to complete Offline
>>>>>>>> data collection:                 (40800) seconds.
>>>>>>>> Offline data collection
>>>>>>>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>>>>>>>                                        Auto Offline data collection on/off support.
>>>>>>>>                                        Suspend Offline collection upon new
>>>>>>>>                                        command.
>>>>>>>>                                        Offline surface scan supported.
>>>>>>>>                                        Self-test supported.
>>>>>>>>                                        Conveyance Self-test supported.
>>>>>>>>                                        Selective Self-test supported.
>>>>>>>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>>>>>>>                                        power-saving mode.
>>>>>>>>                                        Supports SMART auto save timer.
>>>>>>>> Error logging capability:        (0x01) Error logging supported.
>>>>>>>>                                        General Purpose Logging supported.
>>>>>>>> Short self-test routine
>>>>>>>> recommended polling time:        (   2) minutes.
>>>>>>>> Extended self-test routine
>>>>>>>> recommended polling time:        ( 255) minutes.
>>>>>>>> Conveyance self-test routine
>>>>>>>> recommended polling time:        (   5) minutes.
>>>>>>>> SCT capabilities:              (0x303f) SCT Status supported.
>>>>>>>>                                        SCT Feature Control supported.
>>>>>>>>                                        SCT Data Table supported.
>>>>>>>>
>>>>>>>> SMART Attributes Data Structure revision number: 16
>>>>>>>> Vendor Specific SMART Attributes with Thresholds:
>>>>>>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>>>>>>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>>>>>>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>>>>>>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>>>>>>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>>>>>>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>>>>>>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>>>>>>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>>>>>>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>>>>>>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>>>>>>>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>>>>>>>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>>>>>>>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>>>>>>>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>>>>>>>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>>>>>>>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>>>>>>>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>>>>>>>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>>>>>>>
>>>>>>>> SMART Error Log Version: 1
>>>>>>>> No Errors Logged
>>>>>>>>
>>>>>>>> SMART Self-test log structure revision number 1
>>>>>>>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>>>>>>>> # 1  Short offline       Completed without error       00%      5272         -
>>>>>>>>
>>>>>>>> SMART Selective self-test log data structure revision number 1
>>>>>>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>>>>>>>    1        0        0  Not_testing
>>>>>>>>    2        0        0  Not_testing
>>>>>>>>    3        0        0  Not_testing
>>>>>>>>    4        0        0  Not_testing
>>>>>>>>    5        0        0  Not_testing
>>>>>>>> Selective self-test flags (0x0):
>>>>>>>>  After scanning selected spans, do NOT read-scan remainder of disk.
>>>>>>>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>>>From the errors you show, it seems like one of the disks is dead (sda)
>>>>>>>> MB> or dying. It could be just a bad PCB (the controller board of the
>>>>>>>> MB> disk) as it refuses to return SMART data, so you might be able to
>>>>>>>> MB> rescue data by changing the PCB, if it's that important to have that
>>>>>>>> MB> disk.
>>>>>>>>
>>>>>>>> MB> As for the array, you can run a degraded array by force assembling it:
>>>>>>>> MB> mdadm -Af /dev/md0
>>>>>>>> MB> In the command above, mdadm will search on existing disks and
>>>>>>>> MB> partitions, which of them belongs to an array and assemble that array,
>>>>>>>> MB> if possible.
>>>>>>>>
>>>>>>>> MB> I also suggest you install smartmontools package and run smartctl -a
>>>>>>>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>>>>>>>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>>>>>>>> MB> disks.
>>>>>>>>
>>>>>>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>>>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>>>> addendum: when going through the logs I found the reason:
>>>>>>>>>>
>>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>>>>>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>>>>>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>>>>>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>>>>>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>>>>>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>>  [...]
>>>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>>  (crash here)
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> RF> hi,
>>>>>>>>>>
>>>>>>>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>>>>>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>>>>>>>
>>>>>>>>>> RF> the history:
>>>>>>>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>>>>>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>>>>>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>>>>>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>>>>>>>> RF> today the system crashed and the raid won't start:
>>>>>>>>>>
>>>>>>>>>> RF> OS is Centos 5
>>>>>>>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>>>>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>>>>>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>>>>>>>
>>>>>>>>>> RF> # cat /proc/mdstat
>>>>>>>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>>>>>>>> RF> unused devices: <none>
>>>>>>>>>>
>>>>>>>>>> RF> filesystem used on top of md0 is xfs.
>>>>>>>>>>
>>>>>>>>>> RF> please advice what to do next and let me know if you need further
>>>>>>>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> RF> tnx in advance.
>>>>>>>>>>
>>>>>>>>>> RF> --
>>>>>>>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>>>>>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>>>>> feet, just to be sure.
>>>>>>>>>> (Eric Allman)
>>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>>> feet, just to be sure.
>>>>>>>> (Eric Allman)
>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>> feet, just to be sure.
>>>>>> (Eric Allman)
>>>>>> ------------------------------------------------------------------------------
>>>>>>
>>>>>> --
>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>> feet, just to be sure.
>>>> (Eric Allman)
>>>> ------------------------------------------------------------------------------
>>>>
>>>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>> feet, just to be sure.
>> (Eric Allman)
>> ------------------------------------------------------------------------------
>>
>>





------------------------------------------------------------------------------
Unix gives you just enough rope to hang yourself -- and then a couple of more 
feet, just to be sure.
(Eric Allman)
------------------------------------------------------------------------------

--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
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More majordomo info at  http://vger.kernel.org/majordomo-info.html

^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re[10]: raid5: cannot start dirty degraded array
  2009-12-23 17:03                     ` Re[10]: " Rainer Fuegenstein
@ 2009-12-23 18:22                       ` Justin Piszcz
  2009-12-24 16:40                         ` Thomas Fjellstrom
  0 siblings, 1 reply; 18+ messages in thread
From: Justin Piszcz @ 2009-12-23 18:22 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

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Is anyone using (WD) 1.5TB (as noted below) successfully in an array 
without these errors?

On Wed, 23 Dec 2009, Rainer Fuegenstein wrote:

>
> MB> Is the disk being kicked always on the same port? (port 1 for example)
>
> not sure how to interpret the syslog messages:
>
> Nov 28 21:24:40 alfred kernel: ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> Nov 28 21:24:40 alfred kernel: ata2.00: cmd b0/da:00:00:4f:c2/00:00:00:00:00/00 tag 0
> Nov 28 21:24:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
> Nov 28 21:24:40 alfred kernel: ata2.00: status: { DRDY }
> Nov 28 21:24:40 alfred kernel: ata2: soft resetting link
> Nov 28 21:24:41 alfred kernel: ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> Nov 28 21:24:41 alfred kernel: ata2.00: configured for UDMA/133
> Nov 28 21:24:41 alfred kernel: ata2: EH complete
> Nov 28 21:24:41 alfred kernel: SCSI device sdb: 2930277168 512-byte hdwr sectors (1500302 MB)
> Nov 28 21:24:41 alfred kernel: sdb: Write Protect is off
> Nov 28 21:24:41 alfred kernel: SCSI device sdb: drive cache: write back
> Nov 28 21:24:41 alfred smartd[2770]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>
> the smartd message for sdd appears frequently, that's why I replaced
> the drive. the timeout above occured 3 times within the last month for
> sdb. guess you are right with either the port or the cable.
>
> tonight it was sda, but I might have disturbed the cable without
> noticing when replacing sdd.
>
> MB> If so, then you may have a problem with that specific port. If it
> MB> kicks disks randomly, and you're sure that your cables or disks are
> MB> healthy, then it's probably time to change the motherboard.
>
> I plan to move to the new atom/pinetrail mainboards as soon as they
> are available in january. hope that solves this issue. but will check
> the cable anyway.
>
> tnx & cu
>
>
> MB> Increasing the resync values of min will slow down your server if
> MB> you're trying to access it during a resync.
>
> MB> On Wed, Dec 23, 2009 at 6:13 PM, Rainer Fuegenstein
> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>
>>> MB> I don't know why your array takes 3 days to resync. My array is 7TB in
>>> MB> side (8x1TB @ RAID5) and it takes about 16 hours.
>>>
>>> that's definitely a big mystery. I put this to this list some time ago
>>> when upgrading the same array from 4*750GB to 4*1500GB by replacing
>>> one disk after the other and finally --growing the raid:
>>>
>>> 1st disk took just a few minutes
>>> 2nd disk some hours
>>> 3rd disk more than a day
>>> 4th disk about 2+ days
>>> --grow also took  2+ days
>>>
>>> MB> Check the value of this file:
>>> MB> cat /proc/sys/dev/raid/speed_limit_max
>>>
>>> default values are:
>>> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_max
>>> 200000
>>> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_min
>>> 1000
>>>
>>> when resyncing (with these default values), the server becomes awfuly
>>> slow (streaming mp3 via smb suffers timeouts).
>>>
>>> mainboard is an Asus M2N with NFORCE-MCP61 chipset.
>>>
>>> this server started on an 800MHz asus board with 4*400 GB PATA disks
>>> and had this one-disk-failure from the start (every few months). over the
>>> years everything was replaced (power supply, mainboard, disks,
>>> controller, pata to sata, ...) but it still kicks out disks (with the
>>> current asus M2N board about every two to three weeks).
>>>
>>> must be cosmic radiation to blame ...
>>>
>>>
>>> MB> Make it a high number so that when there's no process querying the
>>> MB> disks, the resync process will go for the max speed.
>>> echo '200000' >> /proc/sys/dev/raid/speed_limit_max
>>> MB> (200 MB/s)
>>>
>>> MB> The file /proc/sys/dev/raid/speed_limit_min specified the minimum
>>> MB> speed at which the array should resync, even when there are other
>>> MB> programs querying the disks.
>>>
>>> MB> Make sure you run the above changes just before you issue a resync.
>>> MB> Changes are lost on reboot.
>>>
>>> MB> On Wed, Dec 23, 2009 at 5:30 PM, Rainer Fuegenstein
>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>> tnx for the info, in the meantime I did:
>>>>>
>>>>> mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
>>>>>
>>>>> there was no mdadm.conf file, so I had to specify all devices and do a
>>>>> --force
>>>>>
>>>>>
>>>>> # cat /proc/mdstat
>>>>> Personalities : [raid6] [raid5] [raid4]
>>>>> md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
>>>>>      4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]
>>>>>
>>>>> unused devices: <none>
>>>>>
>>>>> md0 is up :-)
>>>>>
>>>>> I'm about to start backing up the most important data; when this is
>>>>> done I assume the proper way to get back to normal again is:
>>>>>
>>>>> - remove the bad drive from the array: mdadm /dev/md0 -r /dev/sda1
>>>>> - physically replace sda with a new drive
>>>>> - add it back: mdadm /dev/md0 -a /dev/sda1
>>>>> - wait three days for the sync to complete (and keep fingers crossed
>>>>> that no other drive fails)
>>>>>
>>>>> big tnx!
>>>>>
>>>>>
>>>>> MB> sda1 was the only affected member of the array so you should be able
>>>>> MB> to force-assemble the raid5 array and run it in degraded mode.
>>>>>
>>>>> MB> mdadm -Af /dev/md0
>>>>> MB> If that doesn't work for any reason, do this:
>>>>> MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1
>>>>>
>>>>> MB> You can note the disk order from the output of mdadm -E
>>>>>
>>>>> MB> On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>
>>>>>>> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
>>>>>>> should have figured this out myself (sorry; currently running in
>>>>>>> panic mode ;-) )
>>>>>>>
>>>>>>> MB> 1 is the partition which most likely you added to the array rather
>>>>>>> MB> than the whole disk (which is normal).
>>>>>>>
>>>>>>> # mdadm -E /dev/sd[a-z]1
>>>>>>> /dev/sda1:
>>>>>>>          Magic : a92b4efc
>>>>>>>        Version : 0.90.00
>>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>>     Raid Level : raid5
>>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>>   Raid Devices : 4
>>>>>>>  Total Devices : 4
>>>>>>> Preferred Minor : 0
>>>>>>>
>>>>>>>    Update Time : Wed Dec 23 02:54:49 2009
>>>>>>>          State : clean
>>>>>>>  Active Devices : 4
>>>>>>> Working Devices : 4
>>>>>>>  Failed Devices : 0
>>>>>>>  Spare Devices : 0
>>>>>>>       Checksum : 6cfa3a64 - correct
>>>>>>>         Events : 119530
>>>>>>>
>>>>>>>         Layout : left-symmetric
>>>>>>>     Chunk Size : 64K
>>>>>>>
>>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>>> this     2       8        1        2      active sync   /dev/sda1
>>>>>>>
>>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>>   2     2       8        1        2      active sync   /dev/sda1
>>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>>> /dev/sdb1:
>>>>>>>          Magic : a92b4efc
>>>>>>>        Version : 0.90.00
>>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>>     Raid Level : raid5
>>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>>   Raid Devices : 4
>>>>>>>  Total Devices : 4
>>>>>>> Preferred Minor : 0
>>>>>>>
>>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>>>          State : active
>>>>>>>  Active Devices : 3
>>>>>>> Working Devices : 3
>>>>>>>  Failed Devices : 1
>>>>>>>  Spare Devices : 0
>>>>>>>       Checksum : 6cf8f610 - correct
>>>>>>>         Events : 130037
>>>>>>>
>>>>>>>         Layout : left-symmetric
>>>>>>>     Chunk Size : 64K
>>>>>>>
>>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>>> this     0       8       17        0      active sync   /dev/sdb1
>>>>>>>
>>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>>   2     2       0        0        2      faulty removed
>>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>>> /dev/sdc1:
>>>>>>>          Magic : a92b4efc
>>>>>>>        Version : 0.90.00
>>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>>     Raid Level : raid5
>>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>>   Raid Devices : 4
>>>>>>>  Total Devices : 4
>>>>>>> Preferred Minor : 0
>>>>>>>
>>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>>>          State : active
>>>>>>>  Active Devices : 3
>>>>>>> Working Devices : 3
>>>>>>>  Failed Devices : 1
>>>>>>>  Spare Devices : 0
>>>>>>>       Checksum : 6cf8f626 - correct
>>>>>>>         Events : 130037
>>>>>>>
>>>>>>>         Layout : left-symmetric
>>>>>>>     Chunk Size : 64K
>>>>>>>
>>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>>> this     3       8       33        3      active sync   /dev/sdc1
>>>>>>>
>>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>>   2     2       0        0        2      faulty removed
>>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>>> /dev/sdd1:
>>>>>>>          Magic : a92b4efc
>>>>>>>        Version : 0.90.00
>>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
>>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
>>>>>>>     Raid Level : raid5
>>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
>>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
>>>>>>>   Raid Devices : 4
>>>>>>>  Total Devices : 4
>>>>>>> Preferred Minor : 0
>>>>>>>
>>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
>>>>>>>          State : active
>>>>>>>  Active Devices : 3
>>>>>>> Working Devices : 3
>>>>>>>  Failed Devices : 1
>>>>>>>  Spare Devices : 0
>>>>>>>       Checksum : 6cf8f632 - correct
>>>>>>>         Events : 130037
>>>>>>>
>>>>>>>         Layout : left-symmetric
>>>>>>>     Chunk Size : 64K
>>>>>>>
>>>>>>>      Number   Major   Minor   RaidDevice State
>>>>>>> this     1       8       49        1      active sync   /dev/sdd1
>>>>>>>
>>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
>>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
>>>>>>>   2     2       0        0        2      faulty removed
>>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
>>>>>>> [root@alfred log]#
>>>>>>>
>>>>>>> MB> You've included the smart report of one disk only. I suggest you look
>>>>>>> MB> at the other disks as well and make sure that they're not reporting
>>>>>>> MB> any errors. Also, keep in mind that you should run smart test
>>>>>>> MB> periodically (can be configured) and that if you haven't run any test
>>>>>>> MB> before, you have to run a long or offline test before making sure that
>>>>>>> MB> you don't have bad sectors.
>>>>>>>
>>>>>>> tnx for the hint, will do that as soon as I got my data back (if ever
>>>>>>> ...)
>>>>>>>
>>>>>>>
>>>>>>> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
>>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>>>
>>>>>>>>> MB> Give the output of these:
>>>>>>>>> MB> mdadm -E /dev/sd[a-z]
>>>>>>>>>
>>>>>>>>> ]# mdadm -E /dev/sd[a-z]
>>>>>>>>> mdadm: No md superblock detected on /dev/sda.
>>>>>>>>> mdadm: No md superblock detected on /dev/sdb.
>>>>>>>>> mdadm: No md superblock detected on /dev/sdc.
>>>>>>>>> mdadm: No md superblock detected on /dev/sdd.
>>>>>>>>>
>>>>>>>>> I assume that's not a good sign ?!
>>>>>>>>>
>>>>>>>>> sda was powered on and running after the reboot, a smartctl short test
>>>>>>>>> revealed no errors and smartctl -a also looks unsuspicious (see
>>>>>>>>> below). the drives are rather new.
>>>>>>>>>
>>>>>>>>> guess its more likely to be either a problem of the power supply
>>>>>>>>> (400W) or communication between controller and disk.
>>>>>>>>>
>>>>>>>>> /dev/sdd (before it was replaced) reported the following:
>>>>>>>>>
>>>>>>>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>> Dec 20 07:48:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>> Dec 20 08:48:55 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>> Dec 20 09:48:58 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>> Dec 20 10:48:54 alfred smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
>>>>>>>>>
>>>>>>>>> (what triggered a re-sync of the array)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> # smartctl -a /dev/sda
>>>>>>>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
>>>>>>>>> Home page is http://smartmontools.sourceforge.net/
>>>>>>>>>
>>>>>>>>> === START OF INFORMATION SECTION ===
>>>>>>>>> Device Model:     WDC WD15EADS-00R6B0
>>>>>>>>> Serial Number:    WD-WCAUP0017818
>>>>>>>>> Firmware Version: 01.00A01
>>>>>>>>> User Capacity:    1,500,301,910,016 bytes
>>>>>>>>> Device is:        Not in smartctl database [for details use: -P showall]
>>>>>>>>> ATA Version is:   8
>>>>>>>>> ATA Standard is:  Exact ATA specification draft version not indicated
>>>>>>>>> Local Time is:    Wed Dec 23 14:40:46 2009 CET
>>>>>>>>> SMART support is: Available - device has SMART capability.
>>>>>>>>> SMART support is: Enabled
>>>>>>>>>
>>>>>>>>> === START OF READ SMART DATA SECTION ===
>>>>>>>>> SMART overall-health self-assessment test result: PASSED
>>>>>>>>>
>>>>>>>>> General SMART Values:
>>>>>>>>> Offline data collection status:  (0x82) Offline data collection activity
>>>>>>>>>                                        was completed without error.
>>>>>>>>>                                        Auto Offline Data Collection: Enabled.
>>>>>>>>> Self-test execution status:      (   0) The previous self-test routine completed
>>>>>>>>>                                        without error or no self-test has ever
>>>>>>>>>                                        been run.
>>>>>>>>> Total time to complete Offline
>>>>>>>>> data collection:                 (40800) seconds.
>>>>>>>>> Offline data collection
>>>>>>>>> capabilities:                    (0x7b) SMART execute Offline immediate.
>>>>>>>>>                                        Auto Offline data collection on/off support.
>>>>>>>>>                                        Suspend Offline collection upon new
>>>>>>>>>                                        command.
>>>>>>>>>                                        Offline surface scan supported.
>>>>>>>>>                                        Self-test supported.
>>>>>>>>>                                        Conveyance Self-test supported.
>>>>>>>>>                                        Selective Self-test supported.
>>>>>>>>> SMART capabilities:            (0x0003) Saves SMART data before entering
>>>>>>>>>                                        power-saving mode.
>>>>>>>>>                                        Supports SMART auto save timer.
>>>>>>>>> Error logging capability:        (0x01) Error logging supported.
>>>>>>>>>                                        General Purpose Logging supported.
>>>>>>>>> Short self-test routine
>>>>>>>>> recommended polling time:        (   2) minutes.
>>>>>>>>> Extended self-test routine
>>>>>>>>> recommended polling time:        ( 255) minutes.
>>>>>>>>> Conveyance self-test routine
>>>>>>>>> recommended polling time:        (   5) minutes.
>>>>>>>>> SCT capabilities:              (0x303f) SCT Status supported.
>>>>>>>>>                                        SCT Feature Control supported.
>>>>>>>>>                                        SCT Data Table supported.
>>>>>>>>>
>>>>>>>>> SMART Attributes Data Structure revision number: 16
>>>>>>>>> Vendor Specific SMART Attributes with Thresholds:
>>>>>>>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
>>>>>>>>>  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
>>>>>>>>>  3 Spin_Up_Time            0x0027   177   145   021    Pre-fail  Always       -       8133
>>>>>>>>>  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       15
>>>>>>>>>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0
>>>>>>>>>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
>>>>>>>>>  9 Power_On_Hours          0x0032   093   093   000    Old_age   Always       -       5272
>>>>>>>>>  10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0
>>>>>>>>>  11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0
>>>>>>>>>  12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       14
>>>>>>>>> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       2
>>>>>>>>> 193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       13
>>>>>>>>> 194 Temperature_Celsius     0x0022   125   109   000    Old_age   Always       -       27
>>>>>>>>> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0
>>>>>>>>> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
>>>>>>>>> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
>>>>>>>>> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
>>>>>>>>> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0
>>>>>>>>>
>>>>>>>>> SMART Error Log Version: 1
>>>>>>>>> No Errors Logged
>>>>>>>>>
>>>>>>>>> SMART Self-test log structure revision number 1
>>>>>>>>> Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
>>>>>>>>> # 1  Short offline       Completed without error       00%      5272         -
>>>>>>>>>
>>>>>>>>> SMART Selective self-test log data structure revision number 1
>>>>>>>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
>>>>>>>>>    1        0        0  Not_testing
>>>>>>>>>    2        0        0  Not_testing
>>>>>>>>>    3        0        0  Not_testing
>>>>>>>>>    4        0        0  Not_testing
>>>>>>>>>    5        0        0  Not_testing
>>>>>>>>> Selective self-test flags (0x0):
>>>>>>>>>  After scanning selected spans, do NOT read-scan remainder of disk.
>>>>>>>>> If Selective self-test is pending on power-up, resume after 0 minute delay.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>>> From the errors you show, it seems like one of the disks is dead (sda)
>>>>>>>>> MB> or dying. It could be just a bad PCB (the controller board of the
>>>>>>>>> MB> disk) as it refuses to return SMART data, so you might be able to
>>>>>>>>> MB> rescue data by changing the PCB, if it's that important to have that
>>>>>>>>> MB> disk.
>>>>>>>>>
>>>>>>>>> MB> As for the array, you can run a degraded array by force assembling it:
>>>>>>>>> MB> mdadm -Af /dev/md0
>>>>>>>>> MB> In the command above, mdadm will search on existing disks and
>>>>>>>>> MB> partitions, which of them belongs to an array and assemble that array,
>>>>>>>>> MB> if possible.
>>>>>>>>>
>>>>>>>>> MB> I also suggest you install smartmontools package and run smartctl -a
>>>>>>>>> MB> /dev/sd[a-z] and see the report for each disk to make sure you don't
>>>>>>>>> MB> have bad sectors or bad cables (CRC/ATA read errors) on any of the
>>>>>>>>> MB> disks.
>>>>>>>>>
>>>>>>>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
>>>>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
>>>>>>>>>>> addendum: when going through the logs I found the reason:
>>>>>>>>>>>
>>>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
>>>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0
>>>>>>>>>>> Dec 23 02:55:40 alfred kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
>>>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: status: { DRDY }
>>>>>>>>>>> Dec 23 02:55:45 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: device not ready (errno=-16), forcing hardreset
>>>>>>>>>>> Dec 23 02:55:50 alfred kernel: ata1: soft resetting link
>>>>>>>>>>> Dec 23 02:55:55 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>>> Dec 23 02:56:00 alfred kernel: ata1: soft resetting link
>>>>>>>>>>> Dec 23 02:56:05 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>>> Dec 23 02:56:10 alfred kernel: ata1: soft resetting link
>>>>>>>>>>> Dec 23 02:56:15 alfred kernel: ata1: link is slow to respond, please be patient (ready=0)
>>>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: limiting SATA link speed to 1.5 Gbps
>>>>>>>>>>> Dec 23 02:56:45 alfred kernel: ata1: soft resetting link
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: SRST failed (errno=-16)
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: reset failed, giving up
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1.00: disabled
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out command, waited 30s
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: ata1: EH complete
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1244700223
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309191
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 1554309439
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: end_request: I/O error, dev sda, sector 572721343
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: raid5: Disk failure on sda1, disabling device. Operation continuing on 3 devices
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Sending warning via mail to root ...
>>>>>>>>>>> Dec 23 03:22:58 alfred smartd[2692]: Warning via mail to root: successful
>>>>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>>> Dec 23 03:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>>> Dec 23 04:22:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>>> Dec 23 04:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>>>  [...]
>>>>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not capable of SMART self-check
>>>>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, failed to read SMART Attribute Data
>>>>>>>>>>>  (crash here)
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> RF> hi,
>>>>>>>>>>>
>>>>>>>>>>> RF> got a "nice" early christmas present this morning: after a crash, the raid5
>>>>>>>>>>> RF> (consisting of 4*1.5TB WD caviar green SATA disks) won't start :-(
>>>>>>>>>>>
>>>>>>>>>>> RF> the history:
>>>>>>>>>>> RF> sometimes, the raid kicked out one disk, started a resync (which
>>>>>>>>>>> RF> lasted for about 3 days) and was fine after that. a few days ago I
>>>>>>>>>>> RF> replaced drive sdd (which seemed to cause the troubles) and synced the
>>>>>>>>>>> RF> raid again which finished yesterday in the early afternoon. at 10am
>>>>>>>>>>> RF> today the system crashed and the raid won't start:
>>>>>>>>>>>
>>>>>>>>>>> RF> OS is Centos 5
>>>>>>>>>>> RF> mdadm - v2.6.9 - 10th March 2009
>>>>>>>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID arrays.
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sda1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not clean -- starting background reconstruction
>>>>>>>>>>> RF>     (no reconstruction is actually started, disks are idle)
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: automatically using best checksumming function: pIII_sse
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:    pIII_sse  :  7085.000 MB/sec
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: using function: pIII_sse (7085.000 MB/sec)
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1    896 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2    972 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4    893 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8    934 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1     1845 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2     3250 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1    1799 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2    3067 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1    2980 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2    4015 MB/s
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid6: using algorithm sse2x2 (4015 MB/s)
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid6 personality registered for level 6
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid5 personality registered for level 5
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: raid4 personality registered for level 4
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdd1 operational as raid disk 1
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: RAID5 conf printout:
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: raid5: failed to run raid set md0
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ...
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
>>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath: version 1.0.5 loaded
>>>>>>>>>>>
>>>>>>>>>>> RF> # cat /proc/mdstat
>>>>>>>>>>> RF> Personalities : [raid6] [raid5] [raid4]
>>>>>>>>>>> RF> unused devices: <none>
>>>>>>>>>>>
>>>>>>>>>>> RF> filesystem used on top of md0 is xfs.
>>>>>>>>>>>
>>>>>>>>>>> RF> please advice what to do next and let me know if you need further
>>>>>>>>>>> RF> information. really don't want to lose 3TB worth of data :-(
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> RF> tnx in advance.
>>>>>>>>>>>
>>>>>>>>>>> RF> --
>>>>>>>>>>> RF> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>>>>> RF> the body of a message to majordomo@vger.kernel.org
>>>>>>>>>>> RF> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>>>>>> feet, just to be sure.
>>>>>>>>>>> (Eric Allman)
>>>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>>>> feet, just to be sure.
>>>>>>>>> (Eric Allman)
>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>>
>>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ------------------------------------------------------------------------------
>>>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>>>> feet, just to be sure.
>>>>>>> (Eric Allman)
>>>>>>> ------------------------------------------------------------------------------
>>>>>>>
>>>>>>> --
>>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
>>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>>>> feet, just to be sure.
>>>>> (Eric Allman)
>>>>> ------------------------------------------------------------------------------
>>>>>
>>>>>
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Unix gives you just enough rope to hang yourself -- and then a couple of more
>>> feet, just to be sure.
>>> (Eric Allman)
>>> ------------------------------------------------------------------------------
>>>
>>>
>
>
>
>
>
> ------------------------------------------------------------------------------
> Unix gives you just enough rope to hang yourself -- and then a couple of more
> feet, just to be sure.
> (Eric Allman)
> ------------------------------------------------------------------------------
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-raid" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: raid5: cannot start dirty degraded array
  2009-12-23 18:22                       ` Justin Piszcz
@ 2009-12-24 16:40                         ` Thomas Fjellstrom
  2009-12-27 12:57                           ` 99-raid-check (was: raid5: cannot start dirty degraded array) Rainer Fuegenstein
  0 siblings, 1 reply; 18+ messages in thread
From: Thomas Fjellstrom @ 2009-12-24 16:40 UTC (permalink / raw)
  To: Justin Piszcz; +Cc: Rainer Fuegenstein, linux-raid

On Wed December 23 2009, Justin Piszcz wrote:
> Is anyone using (WD) 1.5TB (as noted below) successfully in an array
> without these errors?

I seem to recall SMART making my 2TB Green's flip out if used too much. But 
I'm not sure if that was due to the controller or what.

> On Wed, 23 Dec 2009, Rainer Fuegenstein wrote:
> > MB> Is the disk being kicked always on the same port? (port 1 for
> > example)
> >
> > not sure how to interpret the syslog messages:
> >
> > Nov 28 21:24:40 alfred kernel: ata2.00: exception Emask 0x0 SAct 0x0
> > SErr 0x0 action 0x6 frozen Nov 28 21:24:40 alfred kernel: ata2.00: cmd
> > b0/da:00:00:4f:c2/00:00:00:00:00/00 tag 0 Nov 28 21:24:40 alfred
> > kernel:          res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
> > (timeout) Nov 28 21:24:40 alfred kernel: ata2.00: status: { DRDY }
> > Nov 28 21:24:40 alfred kernel: ata2: soft resetting link
> > Nov 28 21:24:41 alfred kernel: ata2: SATA link up 3.0 Gbps (SStatus 123
> > SControl 300) Nov 28 21:24:41 alfred kernel: ata2.00: configured for
> > UDMA/133 Nov 28 21:24:41 alfred kernel: ata2: EH complete
> > Nov 28 21:24:41 alfred kernel: SCSI device sdb: 2930277168 512-byte
> > hdwr sectors (1500302 MB) Nov 28 21:24:41 alfred kernel: sdb: Write
> > Protect is off
> > Nov 28 21:24:41 alfred kernel: SCSI device sdb: drive cache: write back
> > Nov 28 21:24:41 alfred smartd[2770]: Device: /dev/sdd, 1 Offline
> > uncorrectable sectors
> >
> > the smartd message for sdd appears frequently, that's why I replaced
> > the drive. the timeout above occured 3 times within the last month for
> > sdb. guess you are right with either the port or the cable.
> >
> > tonight it was sda, but I might have disturbed the cable without
> > noticing when replacing sdd.
> >
> > MB> If so, then you may have a problem with that specific port. If it
> > MB> kicks disks randomly, and you're sure that your cables or disks are
> > MB> healthy, then it's probably time to change the motherboard.
> >
> > I plan to move to the new atom/pinetrail mainboards as soon as they
> > are available in january. hope that solves this issue. but will check
> > the cable anyway.
> >
> > tnx & cu
> >
> >
> > MB> Increasing the resync values of min will slow down your server if
> > MB> you're trying to access it during a resync.
> >
> > MB> On Wed, Dec 23, 2009 at 6:13 PM, Rainer Fuegenstein
> >
> > MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
> >>> MB> I don't know why your array takes 3 days to resync. My array is
> >>> 7TB in MB> side (8x1TB @ RAID5) and it takes about 16 hours.
> >>>
> >>> that's definitely a big mystery. I put this to this list some time
> >>> ago when upgrading the same array from 4*750GB to 4*1500GB by
> >>> replacing one disk after the other and finally --growing the raid:
> >>>
> >>> 1st disk took just a few minutes
> >>> 2nd disk some hours
> >>> 3rd disk more than a day
> >>> 4th disk about 2+ days
> >>> --grow also took  2+ days
> >>>
> >>> MB> Check the value of this file:
> >>> MB> cat /proc/sys/dev/raid/speed_limit_max
> >>>
> >>> default values are:
> >>> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_max
> >>> 200000
> >>> [root@alfred cdrom]# cat /proc/sys/dev/raid/speed_limit_min
> >>> 1000
> >>>
> >>> when resyncing (with these default values), the server becomes awfuly
> >>> slow (streaming mp3 via smb suffers timeouts).
> >>>
> >>> mainboard is an Asus M2N with NFORCE-MCP61 chipset.
> >>>
> >>> this server started on an 800MHz asus board with 4*400 GB PATA disks
> >>> and had this one-disk-failure from the start (every few months). over
> >>> the years everything was replaced (power supply, mainboard, disks,
> >>> controller, pata to sata, ...) but it still kicks out disks (with the
> >>> current asus M2N board about every two to three weeks).
> >>>
> >>> must be cosmic radiation to blame ...
> >>>
> >>>
> >>> MB> Make it a high number so that when there's no process querying
> >>> the MB> disks, the resync process will go for the max speed.
> >>> echo '200000' >> /proc/sys/dev/raid/speed_limit_max
> >>> MB> (200 MB/s)
> >>>
> >>> MB> The file /proc/sys/dev/raid/speed_limit_min specified the minimum
> >>> MB> speed at which the array should resync, even when there are other
> >>> MB> programs querying the disks.
> >>>
> >>> MB> Make sure you run the above changes just before you issue a
> >>> resync. MB> Changes are lost on reboot.
> >>>
> >>> MB> On Wed, Dec 23, 2009 at 5:30 PM, Rainer Fuegenstein
> >>>
> >>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
> >>>>> tnx for the info, in the meantime I did:
> >>>>>
> >>>>> mdadm --assemble --force /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1
> >>>>> /dev/sdd1
> >>>>>
> >>>>> there was no mdadm.conf file, so I had to specify all devices and
> >>>>> do a --force
> >>>>>
> >>>>>
> >>>>> # cat /proc/mdstat
> >>>>> Personalities : [raid6] [raid5] [raid4]
> >>>>> md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
> >>>>>      4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]
> >>>>>
> >>>>> unused devices: <none>
> >>>>>
> >>>>> md0 is up :-)
> >>>>>
> >>>>> I'm about to start backing up the most important data; when this is
> >>>>> done I assume the proper way to get back to normal again is:
> >>>>>
> >>>>> - remove the bad drive from the array: mdadm /dev/md0 -r /dev/sda1
> >>>>> - physically replace sda with a new drive
> >>>>> - add it back: mdadm /dev/md0 -a /dev/sda1
> >>>>> - wait three days for the sync to complete (and keep fingers
> >>>>> crossed that no other drive fails)
> >>>>>
> >>>>> big tnx!
> >>>>>
> >>>>>
> >>>>> MB> sda1 was the only affected member of the array so you should be
> >>>>> able MB> to force-assemble the raid5 array and run it in degraded
> >>>>> mode.
> >>>>>
> >>>>> MB> mdadm -Af /dev/md0
> >>>>> MB> If that doesn't work for any reason, do this:
> >>>>> MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1
> >>>>>
> >>>>> MB> You can note the disk order from the output of mdadm -E
> >>>>>
> >>>>> MB> On Wed, Dec 23, 2009 at 5:02 PM, Rainer Fuegenstein
> >>>>>
> >>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
> >>>>>>> MB> My bad, run this: mdadm -E /dev/sd[a-z]1
> >>>>>>> should have figured this out myself (sorry; currently running in
> >>>>>>> panic mode ;-) )
> >>>>>>>
> >>>>>>> MB> 1 is the partition which most likely you added to the array
> >>>>>>> rather MB> than the whole disk (which is normal).
> >>>>>>>
> >>>>>>> # mdadm -E /dev/sd[a-z]1
> >>>>>>> /dev/sda1:
> >>>>>>>          Magic : a92b4efc
> >>>>>>>        Version : 0.90.00
> >>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
> >>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
> >>>>>>>     Raid Level : raid5
> >>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
> >>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
> >>>>>>>   Raid Devices : 4
> >>>>>>>  Total Devices : 4
> >>>>>>> Preferred Minor : 0
> >>>>>>>
> >>>>>>>    Update Time : Wed Dec 23 02:54:49 2009
> >>>>>>>          State : clean
> >>>>>>>  Active Devices : 4
> >>>>>>> Working Devices : 4
> >>>>>>>  Failed Devices : 0
> >>>>>>>  Spare Devices : 0
> >>>>>>>       Checksum : 6cfa3a64 - correct
> >>>>>>>         Events : 119530
> >>>>>>>
> >>>>>>>         Layout : left-symmetric
> >>>>>>>     Chunk Size : 64K
> >>>>>>>
> >>>>>>>      Number   Major   Minor   RaidDevice State
> >>>>>>> this     2       8        1        2      active sync   /dev/sda1
> >>>>>>>
> >>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
> >>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
> >>>>>>>   2     2       8        1        2      active sync   /dev/sda1
> >>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
> >>>>>>> /dev/sdb1:
> >>>>>>>          Magic : a92b4efc
> >>>>>>>        Version : 0.90.00
> >>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
> >>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
> >>>>>>>     Raid Level : raid5
> >>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
> >>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
> >>>>>>>   Raid Devices : 4
> >>>>>>>  Total Devices : 4
> >>>>>>> Preferred Minor : 0
> >>>>>>>
> >>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
> >>>>>>>          State : active
> >>>>>>>  Active Devices : 3
> >>>>>>> Working Devices : 3
> >>>>>>>  Failed Devices : 1
> >>>>>>>  Spare Devices : 0
> >>>>>>>       Checksum : 6cf8f610 - correct
> >>>>>>>         Events : 130037
> >>>>>>>
> >>>>>>>         Layout : left-symmetric
> >>>>>>>     Chunk Size : 64K
> >>>>>>>
> >>>>>>>      Number   Major   Minor   RaidDevice State
> >>>>>>> this     0       8       17        0      active sync   /dev/sdb1
> >>>>>>>
> >>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
> >>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
> >>>>>>>   2     2       0        0        2      faulty removed
> >>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
> >>>>>>> /dev/sdc1:
> >>>>>>>          Magic : a92b4efc
> >>>>>>>        Version : 0.90.00
> >>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
> >>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
> >>>>>>>     Raid Level : raid5
> >>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
> >>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
> >>>>>>>   Raid Devices : 4
> >>>>>>>  Total Devices : 4
> >>>>>>> Preferred Minor : 0
> >>>>>>>
> >>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
> >>>>>>>          State : active
> >>>>>>>  Active Devices : 3
> >>>>>>> Working Devices : 3
> >>>>>>>  Failed Devices : 1
> >>>>>>>  Spare Devices : 0
> >>>>>>>       Checksum : 6cf8f626 - correct
> >>>>>>>         Events : 130037
> >>>>>>>
> >>>>>>>         Layout : left-symmetric
> >>>>>>>     Chunk Size : 64K
> >>>>>>>
> >>>>>>>      Number   Major   Minor   RaidDevice State
> >>>>>>> this     3       8       33        3      active sync   /dev/sdc1
> >>>>>>>
> >>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
> >>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
> >>>>>>>   2     2       0        0        2      faulty removed
> >>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
> >>>>>>> /dev/sdd1:
> >>>>>>>          Magic : a92b4efc
> >>>>>>>        Version : 0.90.00
> >>>>>>>           UUID : 81833582:d651e953:48cc5797:38b256ea
> >>>>>>>  Creation Time : Mon Mar 31 13:30:45 2008
> >>>>>>>     Raid Level : raid5
> >>>>>>>  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
> >>>>>>>     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
> >>>>>>>   Raid Devices : 4
> >>>>>>>  Total Devices : 4
> >>>>>>> Preferred Minor : 0
> >>>>>>>
> >>>>>>>    Update Time : Wed Dec 23 10:07:42 2009
> >>>>>>>          State : active
> >>>>>>>  Active Devices : 3
> >>>>>>> Working Devices : 3
> >>>>>>>  Failed Devices : 1
> >>>>>>>  Spare Devices : 0
> >>>>>>>       Checksum : 6cf8f632 - correct
> >>>>>>>         Events : 130037
> >>>>>>>
> >>>>>>>         Layout : left-symmetric
> >>>>>>>     Chunk Size : 64K
> >>>>>>>
> >>>>>>>      Number   Major   Minor   RaidDevice State
> >>>>>>> this     1       8       49        1      active sync   /dev/sdd1
> >>>>>>>
> >>>>>>>   0     0       8       17        0      active sync   /dev/sdb1
> >>>>>>>   1     1       8       49        1      active sync   /dev/sdd1
> >>>>>>>   2     2       0        0        2      faulty removed
> >>>>>>>   3     3       8       33        3      active sync   /dev/sdc1
> >>>>>>> [root@alfred log]#
> >>>>>>>
> >>>>>>> MB> You've included the smart report of one disk only. I suggest
> >>>>>>> you look MB> at the other disks as well and make sure that
> >>>>>>> they're not reporting MB> any errors. Also, keep in mind that you
> >>>>>>> should run smart test MB> periodically (can be configured) and
> >>>>>>> that if you haven't run any test MB> before, you have to run a
> >>>>>>> long or offline test before making sure that MB> you don't have
> >>>>>>> bad sectors.
> >>>>>>>
> >>>>>>> tnx for the hint, will do that as soon as I got my data back (if
> >>>>>>> ever ...)
> >>>>>>>
> >>>>>>>
> >>>>>>> MB> On Wed, Dec 23, 2009 at 4:44 PM, Rainer Fuegenstein
> >>>>>>>
> >>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
> >>>>>>>>> MB> Give the output of these:
> >>>>>>>>> MB> mdadm -E /dev/sd[a-z]
> >>>>>>>>>
> >>>>>>>>> ]# mdadm -E /dev/sd[a-z]
> >>>>>>>>> mdadm: No md superblock detected on /dev/sda.
> >>>>>>>>> mdadm: No md superblock detected on /dev/sdb.
> >>>>>>>>> mdadm: No md superblock detected on /dev/sdc.
> >>>>>>>>> mdadm: No md superblock detected on /dev/sdd.
> >>>>>>>>>
> >>>>>>>>> I assume that's not a good sign ?!
> >>>>>>>>>
> >>>>>>>>> sda was powered on and running after the reboot, a smartctl
> >>>>>>>>> short test revealed no errors and smartctl -a also looks
> >>>>>>>>> unsuspicious (see below). the drives are rather new.
> >>>>>>>>>
> >>>>>>>>> guess its more likely to be either a problem of the power
> >>>>>>>>> supply (400W) or communication between controller and disk.
> >>>>>>>>>
> >>>>>>>>> /dev/sdd (before it was replaced) reported the following:
> >>>>>>>>>
> >>>>>>>>> Dec 20 07:18:54 alfred smartd[2705]: Device: /dev/sdd, 1
> >>>>>>>>> Offline uncorrectable sectors Dec 20 07:48:53 alfred
> >>>>>>>>> smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> >>>>>>>>> Dec 20 08:18:54 alfred smartd[2705]: Device: /dev/sdd, 1
> >>>>>>>>> Offline uncorrectable sectors Dec 20 08:48:55 alfred
> >>>>>>>>> smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> >>>>>>>>> Dec 20 09:18:53 alfred smartd[2705]: Device: /dev/sdd, 1
> >>>>>>>>> Offline uncorrectable sectors Dec 20 09:48:58 alfred
> >>>>>>>>> smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> >>>>>>>>> Dec 20 10:19:01 alfred smartd[2705]: Device: /dev/sdd, 1
> >>>>>>>>> Offline uncorrectable sectors Dec 20 10:48:54 alfred
> >>>>>>>>> smartd[2705]: Device: /dev/sdd, 1 Offline uncorrectable sectors
> >>>>>>>>>
> >>>>>>>>> (what triggered a re-sync of the array)
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> # smartctl -a /dev/sda
> >>>>>>>>> smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C)
> >>>>>>>>> 2002-8 Bruce Allen Home page is
> >>>>>>>>> http://smartmontools.sourceforge.net/
> >>>>>>>>>
> >>>>>>>>> === START OF INFORMATION SECTION ===
> >>>>>>>>> Device Model:     WDC WD15EADS-00R6B0
> >>>>>>>>> Serial Number:    WD-WCAUP0017818
> >>>>>>>>> Firmware Version: 01.00A01
> >>>>>>>>> User Capacity:    1,500,301,910,016 bytes
> >>>>>>>>> Device is:        Not in smartctl database [for details use: -P
> >>>>>>>>> showall] ATA Version is:   8
> >>>>>>>>> ATA Standard is:  Exact ATA specification draft version not
> >>>>>>>>> indicated Local Time is:    Wed Dec 23 14:40:46 2009 CET
> >>>>>>>>> SMART support is: Available - device has SMART capability.
> >>>>>>>>> SMART support is: Enabled
> >>>>>>>>>
> >>>>>>>>> === START OF READ SMART DATA SECTION ===
> >>>>>>>>> SMART overall-health self-assessment test result: PASSED
> >>>>>>>>>
> >>>>>>>>> General SMART Values:
> >>>>>>>>> Offline data collection status:  (0x82) Offline data collection
> >>>>>>>>> activity was completed without error. Auto Offline Data
> >>>>>>>>> Collection: Enabled. Self-test execution status:      (   0)
> >>>>>>>>> The previous self-test routine completed without error or no
> >>>>>>>>> self-test has ever been run.
> >>>>>>>>> Total time to complete Offline
> >>>>>>>>> data collection:                 (40800) seconds.
> >>>>>>>>> Offline data collection
> >>>>>>>>> capabilities:                    (0x7b) SMART execute Offline
> >>>>>>>>> immediate. Auto Offline data collection on/off support. Suspend
> >>>>>>>>> Offline collection upon new command.
> >>>>>>>>>                                        Offline surface scan
> >>>>>>>>> supported. Self-test supported. Conveyance Self-test supported.
> >>>>>>>>> Selective Self-test supported. SMART capabilities:          
> >>>>>>>>>  (0x0003) Saves SMART data before entering power-saving mode.
> >>>>>>>>> Supports SMART auto save timer. Error logging capability:      
> >>>>>>>>>  (0x01) Error logging supported. General Purpose Logging
> >>>>>>>>> supported. Short self-test routine
> >>>>>>>>> recommended polling time:        (   2) minutes.
> >>>>>>>>> Extended self-test routine
> >>>>>>>>> recommended polling time:        ( 255) minutes.
> >>>>>>>>> Conveyance self-test routine
> >>>>>>>>> recommended polling time:        (   5) minutes.
> >>>>>>>>> SCT capabilities:              (0x303f) SCT Status supported.
> >>>>>>>>>                                        SCT Feature Control
> >>>>>>>>> supported. SCT Data Table supported.
> >>>>>>>>>
> >>>>>>>>> SMART Attributes Data Structure revision number: 16
> >>>>>>>>> Vendor Specific SMART Attributes with Thresholds:
> >>>>>>>>> ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE  
> >>>>>>>>>    UPDATED  WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate    
> >>>>>>>>> 0x002f   200   200   051    Pre-fail  Always       -       0 3
> >>>>>>>>> Spin_Up_Time            0x0027   177   145   021    Pre-fail
> >>>>>>>>>  Always       -       8133 4 Start_Stop_Count        0x0032  
> >>>>>>>>> 100   100   000    Old_age   Always       -       15 5
> >>>>>>>>> Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail
> >>>>>>>>>  Always       -       0 7 Seek_Error_Rate         0x002e   200
> >>>>>>>>>   200   000    Old_age   Always       -       0 9
> >>>>>>>>> Power_On_Hours          0x0032   093   093   000    Old_age  
> >>>>>>>>> Always       -       5272 10 Spin_Retry_Count        0x0032  
> >>>>>>>>> 100   253   000    Old_age   Always       -       0 11
> >>>>>>>>> Calibration_Retry_Count 0x0032   100   253   000    Old_age  
> >>>>>>>>> Always       -       0 12 Power_Cycle_Count       0x0032   100
> >>>>>>>>>   100   000    Old_age   Always       -       14 192
> >>>>>>>>> Power-Off_Retract_Count 0x0032   200   200   000    Old_age  
> >>>>>>>>> Always       -       2 193 Load_Cycle_Count        0x0032   200
> >>>>>>>>>   200   000    Old_age   Always       -       13 194
> >>>>>>>>> Temperature_Celsius     0x0022   125   109   000    Old_age  
> >>>>>>>>> Always       -       27 196 Reallocated_Event_Count 0x0032  
> >>>>>>>>> 200   200   000    Old_age   Always       -       0 197
> >>>>>>>>> Current_Pending_Sector  0x0032   200   200   000    Old_age  
> >>>>>>>>> Always       -       0 198 Offline_Uncorrectable   0x0030   200
> >>>>>>>>>   200   000    Old_age   Offline      -       0 199
> >>>>>>>>> UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age  
> >>>>>>>>> Always       -       0 200 Multi_Zone_Error_Rate   0x0008   200
> >>>>>>>>>   200   000    Old_age   Offline      -       0
> >>>>>>>>>
> >>>>>>>>> SMART Error Log Version: 1
> >>>>>>>>> No Errors Logged
> >>>>>>>>>
> >>>>>>>>> SMART Self-test log structure revision number 1
> >>>>>>>>> Num  Test_Description    Status                  Remaining
> >>>>>>>>>  LifeTime(hours)  LBA_of_first_error # 1  Short offline      
> >>>>>>>>> Completed without error       00%      5272         -
> >>>>>>>>>
> >>>>>>>>> SMART Selective self-test log data structure revision number 1
> >>>>>>>>>  SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
> >>>>>>>>>    1        0        0  Not_testing
> >>>>>>>>>    2        0        0  Not_testing
> >>>>>>>>>    3        0        0  Not_testing
> >>>>>>>>>    4        0        0  Not_testing
> >>>>>>>>>    5        0        0  Not_testing
> >>>>>>>>> Selective self-test flags (0x0):
> >>>>>>>>>  After scanning selected spans, do NOT read-scan remainder of
> >>>>>>>>> disk. If Selective self-test is pending on power-up, resume
> >>>>>>>>> after 0 minute delay.
> >>>>>>>>>
> >>>>>>>>>>> From the errors you show, it seems like one of the disks is
> >>>>>>>>>>> dead (sda)
> >>>>>>>>>
> >>>>>>>>> MB> or dying. It could be just a bad PCB (the controller board
> >>>>>>>>> of the MB> disk) as it refuses to return SMART data, so you
> >>>>>>>>> might be able to MB> rescue data by changing the PCB, if it's
> >>>>>>>>> that important to have that MB> disk.
> >>>>>>>>>
> >>>>>>>>> MB> As for the array, you can run a degraded array by force
> >>>>>>>>> assembling it: MB> mdadm -Af /dev/md0
> >>>>>>>>> MB> In the command above, mdadm will search on existing disks
> >>>>>>>>> and MB> partitions, which of them belongs to an array and
> >>>>>>>>> assemble that array, MB> if possible.
> >>>>>>>>>
> >>>>>>>>> MB> I also suggest you install smartmontools package and run
> >>>>>>>>> smartctl -a MB> /dev/sd[a-z] and see the report for each disk
> >>>>>>>>> to make sure you don't MB> have bad sectors or bad cables
> >>>>>>>>> (CRC/ATA read errors) on any of the MB> disks.
> >>>>>>>>>
> >>>>>>>>> MB> On Wed, Dec 23, 2009 at 3:50 PM, Rainer Fuegenstein
> >>>>>>>>>
> >>>>>>>>> MB> <rfu@kaneda.iguw.tuwien.ac.at> wrote:
> >>>>>>>>>>> addendum: when going through the logs I found the reason:
> >>>>>>>>>>>
> >>>>>>>>>>> Dec 23 02:55:40 alfred kernel: ata1.00: exception Emask 0x0
> >>>>>>>>>>> SAct 0x0 SErr 0x0 action 0x6 frozen Dec 23 02:55:40 alfred
> >>>>>>>>>>> kernel: ata1.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag
> >>>>>>>>>>> 0 Dec 23 02:55:40 alfred kernel:          res
> >>>>>>>>>>> 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) Dec
> >>>>>>>>>>> 23 02:55:40 alfred kernel: ata1.00: status: { DRDY } Dec 23
> >>>>>>>>>>> 02:55:45 alfred kernel: ata1: link is slow to respond, please
> >>>>>>>>>>> be patient (ready=0) Dec 23 02:55:50 alfred kernel: ata1:
> >>>>>>>>>>> device not ready (errno=-16), forcing hardreset Dec 23
> >>>>>>>>>>> 02:55:50 alfred kernel: ata1: soft resetting link Dec 23
> >>>>>>>>>>> 02:55:55 alfred kernel: ata1: link is slow to respond, please
> >>>>>>>>>>> be patient (ready=0) Dec 23 02:56:00 alfred kernel: ata1:
> >>>>>>>>>>> SRST failed (errno=-16) Dec 23 02:56:00 alfred kernel: ata1:
> >>>>>>>>>>> soft resetting link Dec 23 02:56:05 alfred kernel: ata1: link
> >>>>>>>>>>> is slow to respond, please be patient (ready=0) Dec 23
> >>>>>>>>>>> 02:56:10 alfred kernel: ata1: SRST failed (errno=-16) Dec 23
> >>>>>>>>>>> 02:56:10 alfred kernel: ata1: soft resetting link Dec 23
> >>>>>>>>>>> 02:56:15 alfred kernel: ata1: link is slow to respond, please
> >>>>>>>>>>> be patient (ready=0) Dec 23 02:56:45 alfred kernel: ata1:
> >>>>>>>>>>> SRST failed (errno=-16) Dec 23 02:56:45 alfred kernel: ata1:
> >>>>>>>>>>> limiting SATA link speed to 1.5 Gbps Dec 23 02:56:45 alfred
> >>>>>>>>>>> kernel: ata1: soft resetting link Dec 23 02:56:50 alfred
> >>>>>>>>>>> kernel: ata1: SRST failed (errno=-16) Dec 23 02:56:50 alfred
> >>>>>>>>>>> kernel: ata1: reset failed, giving up Dec 23 02:56:50 alfred
> >>>>>>>>>>> kernel: ata1.00: disabled
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: timing out
> >>>>>>>>>>> command, waited 30s Dec 23 02:56:50 alfred kernel: ata1: EH
> >>>>>>>>>>> complete
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return
> >>>>>>>>>>> code = 0x00040000 Dec 23 02:56:50 alfred kernel: end_request:
> >>>>>>>>>>> I/O error, dev sda, sector 1244700223 Dec 23 02:56:50 alfred
> >>>>>>>>>>> kernel: sd 0:0:0:0: SCSI error: return code = 0x00040000 Dec
> >>>>>>>>>>> 23 02:56:50 alfred kernel: end_request: I/O error, dev sda,
> >>>>>>>>>>> sector 1554309191 Dec 23 02:56:50 alfred kernel: sd 0:0:0:0:
> >>>>>>>>>>> SCSI error: return code = 0x00040000 Dec 23 02:56:50 alfred
> >>>>>>>>>>> kernel: end_request: I/O error, dev sda, sector 1554309439
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel: sd 0:0:0:0: SCSI error: return
> >>>>>>>>>>> code = 0x00040000 Dec 23 02:56:50 alfred kernel: end_request:
> >>>>>>>>>>> I/O error, dev sda, sector 572721343 Dec 23 02:56:50 alfred
> >>>>>>>>>>> kernel: raid5: Disk failure on sda1, disabling device.
> >>>>>>>>>>> Operation continuing on 3 devices Dec 23 02:56:50 alfred
> >>>>>>>>>>> kernel: RAID5 conf printout:
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 2, o:0, dev:sda1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel: RAID5 conf printout:
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  --- rd:4 wd:3 fd:1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 0, o:1, dev:sdb1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 1, o:1, dev:sdd1
> >>>>>>>>>>> Dec 23 02:56:50 alfred kernel:  disk 3, o:1, dev:sdc1
> >>>>>>>>>>> Dec 23 03:22:57 alfred smartd[2692]: Device: /dev/sda, not
> >>>>>>>>>>> capable of SMART self-check Dec 23 03:22:57 alfred
> >>>>>>>>>>> smartd[2692]: Sending warning via mail to root ... Dec 23
> >>>>>>>>>>> 03:22:58 alfred smartd[2692]: Warning via mail to root:
> >>>>>>>>>>> successful Dec 23 03:22:58 alfred smartd[2692]: Device:
> >>>>>>>>>>> /dev/sda, failed to read SMART Attribute Data Dec 23 03:22:58
> >>>>>>>>>>> alfred smartd[2692]: Sending warning via mail to root ... Dec
> >>>>>>>>>>> 23 03:22:58 alfred smartd[2692]: Warning via mail to root:
> >>>>>>>>>>> successful Dec 23 03:52:57 alfred smartd[2692]: Device:
> >>>>>>>>>>> /dev/sda, not capable of SMART self-check Dec 23 03:52:57
> >>>>>>>>>>> alfred smartd[2692]: Device: /dev/sda, failed to read SMART
> >>>>>>>>>>> Attribute Data Dec 23 04:22:57 alfred smartd[2692]: Device:
> >>>>>>>>>>> /dev/sda, not capable of SMART self-check Dec 23 04:22:57
> >>>>>>>>>>> alfred smartd[2692]: Device: /dev/sda, failed to read SMART
> >>>>>>>>>>> Attribute Data Dec 23 04:52:57 alfred smartd[2692]: Device:
> >>>>>>>>>>> /dev/sda, not capable of SMART self-check [...]
> >>>>>>>>>>> Dec 23 09:52:57 alfred smartd[2692]: Device: /dev/sda, not
> >>>>>>>>>>> capable of SMART self-check Dec 23 09:52:57 alfred
> >>>>>>>>>>> smartd[2692]: Device: /dev/sda, failed to read SMART
> >>>>>>>>>>> Attribute Data (crash here)
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> RF> hi,
> >>>>>>>>>>>
> >>>>>>>>>>> RF> got a "nice" early christmas present this morning: after
> >>>>>>>>>>> a crash, the raid5 RF> (consisting of 4*1.5TB WD caviar green
> >>>>>>>>>>> SATA disks) won't start :-(
> >>>>>>>>>>>
> >>>>>>>>>>> RF> the history:
> >>>>>>>>>>> RF> sometimes, the raid kicked out one disk, started a resync
> >>>>>>>>>>> (which RF> lasted for about 3 days) and was fine after that.
> >>>>>>>>>>> a few days ago I RF> replaced drive sdd (which seemed to
> >>>>>>>>>>> cause the troubles) and synced the RF> raid again which
> >>>>>>>>>>> finished yesterday in the early afternoon. at 10am RF> today
> >>>>>>>>>>> the system crashed and the raid won't start:
> >>>>>>>>>>>
> >>>>>>>>>>> RF> OS is Centos 5
> >>>>>>>>>>> RF> mdadm - v2.6.9 - 10th March 2009
> >>>>>>>>>>> RF> Linux alfred 2.6.18-164.6.1.el5xen #1 SMP Tue Nov 3
> >>>>>>>>>>> 17:53:47 EST 2009 i686 athlon i386 GNU/Linux
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: Autodetecting RAID
> >>>>>>>>>>> arrays. RF> Dec 23 12:30:19 alfred kernel: md: autorun ...
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: considering sdd1 ...
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdd1 ...
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdc1 ...
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sdb1 ...
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md:  adding sda1 ...
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: created md0
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sda1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdb1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: running:
> >>>>>>>>>>> <sdd1><sdc1><sdb1><sda1> RF> Dec 23 12:30:19 alfred kernel:
> >>>>>>>>>>> md: kicking non-fresh sda1 from array! RF> Dec 23 12:30:19
> >>>>>>>>>>> alfred kernel: md: unbind<sda1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sda1)
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0: raid array is not
> >>>>>>>>>>> clean -- starting background reconstruction RF>     (no
> >>>>>>>>>>> reconstruction is actually started, disks are idle) RF> Dec
> >>>>>>>>>>> 23 12:30:19 alfred kernel: raid5: automatically using best
> >>>>>>>>>>> checksumming function: pIII_sse RF> Dec 23 12:30:19 alfred
> >>>>>>>>>>> kernel:    pIII_sse  :  7085.000 MB/sec RF> Dec 23 12:30:19
> >>>>>>>>>>> alfred kernel: raid5: using function: pIII_sse (7085.000
> >>>>>>>>>>> MB/sec) RF> Dec 23 12:30:19 alfred kernel: raid6: int32x1  
> >>>>>>>>>>>  896 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: int32x2  
> >>>>>>>>>>>  972 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: int32x4  
> >>>>>>>>>>>  893 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: int32x8  
> >>>>>>>>>>>  934 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx1    
> >>>>>>>>>>> 1845 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: mmxx2    
> >>>>>>>>>>> 3250 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x1  
> >>>>>>>>>>>  1799 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: sse1x2  
> >>>>>>>>>>>  3067 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x1  
> >>>>>>>>>>>  2980 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: sse2x2  
> >>>>>>>>>>>  4015 MB/s RF> Dec 23 12:30:19 alfred kernel: raid6: using
> >>>>>>>>>>> algorithm sse2x2 (4015 MB/s) RF> Dec 23 12:30:19 alfred
> >>>>>>>>>>> kernel: md: raid6 personality registered for level 6 RF> Dec
> >>>>>>>>>>> 23 12:30:19 alfred kernel: md: raid5 personality registered
> >>>>>>>>>>> for level 5 RF> Dec 23 12:30:19 alfred kernel: md: raid4
> >>>>>>>>>>> personality registered for level 4 RF> Dec 23 12:30:19 alfred
> >>>>>>>>>>> kernel: raid5: device sdd1 operational as raid disk 1 RF> Dec
> >>>>>>>>>>> 23 12:30:19 alfred kernel: raid5: device sdc1 operational as
> >>>>>>>>>>> raid disk 3 RF> Dec 23 12:30:19 alfred kernel: raid5: device
> >>>>>>>>>>> sdb1 operational as raid disk 0 RF> Dec 23 12:30:19 alfred
> >>>>>>>>>>> kernel: raid5: cannot start dirty degraded array for md0 RF>
> >>>>>>>>>>> Dec 23 12:30:19 alfred kernel: RAID5 conf printout: RF> Dec
> >>>>>>>>>>> 23 12:30:19 alfred kernel:  --- rd:4 wd:3 fd:1 RF> Dec 23
> >>>>>>>>>>> 12:30:19 alfred kernel:  disk 0, o:1, dev:sdb1 RF> Dec 23
> >>>>>>>>>>> 12:30:19 alfred kernel:  disk 1, o:1, dev:sdd1 RF> Dec 23
> >>>>>>>>>>> 12:30:19 alfred kernel:  disk 3, o:1, dev:sdc1 RF> Dec 23
> >>>>>>>>>>> 12:30:19 alfred kernel: raid5: failed to run raid set md0 RF>
> >>>>>>>>>>> Dec 23 12:30:19 alfred kernel: md: pers->run() failed ... RF>
> >>>>>>>>>>> Dec 23 12:30:19 alfred kernel: md: do_md_run() returned -5
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: md0 stopped.
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdd1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdd1)
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdc1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdc1)
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: unbind<sdb1>
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: export_rdev(sdb1)
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: md: ... autorun DONE.
> >>>>>>>>>>> RF> Dec 23 12:30:19 alfred kernel: device-mapper: multipath:
> >>>>>>>>>>> version 1.0.5 loaded
> >>>>>>>>>>>
> >>>>>>>>>>> RF> # cat /proc/mdstat
> >>>>>>>>>>> RF> Personalities : [raid6] [raid5] [raid4]
> >>>>>>>>>>> RF> unused devices: <none>
> >>>>>>>>>>>
> >>>>>>>>>>> RF> filesystem used on top of md0 is xfs.
> >>>>>>>>>>>
> >>>>>>>>>>> RF> please advice what to do next and let me know if you need
> >>>>>>>>>>> further RF> information. really don't want to lose 3TB worth
> >>>>>>>>>>> of data :-(
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> RF> tnx in advance.
> >>>>>>>>>>>
> >>>>>>>>>>> RF> --
> >>>>>>>>>>> RF> To unsubscribe from this list: send the line "unsubscribe
> >>>>>>>>>>> linux-raid" in RF> the body of a message to
> >>>>>>>>>>> majordomo@vger.kernel.org RF> More majordomo info at
> >>>>>>>>>>>  http://vger.kernel.org/majordomo-info.html
> >>>>>>>>>>>
> >>>>>>>>>>>
> >>>>>>>>>>> -------------------------------------------------------------
> >>>>>>>>>>>----------------- Unix gives you just enough rope to hang
> >>>>>>>>>>> yourself -- and then a couple of more feet, just to be sure.
> >>>>>>>>>>> (Eric Allman)
> >>>>>>>>>>> -------------------------------------------------------------
> >>>>>>>>>>>-----------------
> >>>>>>>>>>>
> >>>>>>>>>>> --
> >>>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe
> >>>>>>>>>>> linux-raid" in the body of a message to
> >>>>>>>>>>> majordomo@vger.kernel.org
> >>>>>>>>>>> More majordomo info at
> >>>>>>>>>>>  http://vger.kernel.org/majordomo-info.html
> >>>>>>>>>
> >>>>>>>>> ---------------------------------------------------------------
> >>>>>>>>>--------------- Unix gives you just enough rope to hang yourself
> >>>>>>>>> -- and then a couple of more feet, just to be sure.
> >>>>>>>>> (Eric Allman)
> >>>>>>>>> ---------------------------------------------------------------
> >>>>>>>>>---------------
> >>>>>>>
> >>>>>>> -----------------------------------------------------------------
> >>>>>>>------------- Unix gives you just enough rope to hang yourself --
> >>>>>>> and then a couple of more feet, just to be sure.
> >>>>>>> (Eric Allman)
> >>>>>>> -----------------------------------------------------------------
> >>>>>>>-------------
> >>>>>>>
> >>>>>>> --
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> >>>>> (Eric Allman)
> >>>>> -------------------------------------------------------------------
> >>>>>-----------
> >>>
> >>> ---------------------------------------------------------------------
> >>>--------- Unix gives you just enough rope to hang yourself -- and then
> >>> a couple of more feet, just to be sure.
> >>> (Eric Allman)
> >>> ---------------------------------------------------------------------
> >>>---------
> >
> > -----------------------------------------------------------------------
> >------- Unix gives you just enough rope to hang yourself -- and then a
> > couple of more feet, just to be sure.
> > (Eric Allman)
> > -----------------------------------------------------------------------
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> >
> > --
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> 


-- 
Thomas Fjellstrom
tfjellstrom@shaw.ca

^ permalink raw reply	[flat|nested] 18+ messages in thread

* 99-raid-check (was: raid5: cannot start dirty degraded array)
  2009-12-24 16:40                         ` Thomas Fjellstrom
@ 2009-12-27 12:57                           ` Rainer Fuegenstein
  0 siblings, 0 replies; 18+ messages in thread
From: Rainer Fuegenstein @ 2009-12-27 12:57 UTC (permalink / raw)
  To: linux-raid

addendum:

after backing up data for 30 hours off the degraded array, replacing
sda and after another 50 hours resync the raid5 was healthy again. for
about 8 hours when again it was syncing.

and then I discovered at least a small part of the mystery:

centos 5 runs a script /etc/cron.weekly/99-raid-check (once a week of
course) which (since a few months) triggers a re-sync of the array
(which then runs for another 50 hours at a system load of around 8.0).

I always noticed that it resynced without a drive marked "faulty" in
/proc/mdstat, but I never really took it seriously. And being away so
often I never realized that it always started at sunday 4:20 in the
night.
rebooting during the resync stops it and the system behaves normally
again.

If I interpret the text in /etc/sysconfig/raid-check correctly, I'd
better leave 99-raid-check running (for 50 hours ... :-( ), check
the value of /sys/block/md0/md/mismatch_cnt and if it contains other
than 0, I'd better get worried?

and, catching up with a previous suggestion in this thread: is it safe
to run a smrtctl long selftest on each disk while the raid is mounted
& active? long selftest is supposed to take about 4 hours (per disk).

tnx & cu

^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: raid5: cannot start dirty degraded array
  2009-12-23 14:30             ` Re[6]: " Rainer Fuegenstein
  2009-12-23 14:35               ` Majed B.
@ 2009-12-23 14:49               ` Asdo
       [not found]                 ` <1339530534.20091223201649@kaneda.iguw.tuwien.ac.at>
  1 sibling, 1 reply; 18+ messages in thread
From: Asdo @ 2009-12-23 14:49 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

Rainer Fuegenstein wrote:
> MB> mdadm -Af /dev/md0
> MB> If that doesn't work for any reason, do this:
> MB> mdadm -Af /dev/md0 /dev/sdb1 /dev/sdd1 /dev/sdc1
>
> MB> You can note the disk order from the output of mdadm -E
>   

The --assemble --force needs correct order of drives to be specified!?!?
I think it autodetects that
(would be EXTREMELY RISKY otherwise...)

Rainer, just after starting the array you can:
  mdadm --readonly /dev/md0
so to be sure that no writes ever happen and a resync does not happen.

I suggest to take data out before doing any modifications (such as a 
resync), if you can.

note: xfs needs -o ro,nobarrier,norecovery upon mount, in order to be 
mounted from a readonly array.

As MB suggests, it's better to keep the the most recently failed drive 
out of the array if possible, in order to have more coherent data. Also  
true when you are going to add the first spare (that will cause a resync 
and regeneration of one disk).

^ permalink raw reply	[flat|nested] 18+ messages in thread

[parent not found: <1339530534.20091223201649@kaneda.iguw.tuwien.ac.at>]

* Re: raid5: cannot start dirty degraded array
       [not found]                 ` <1339530534.20091223201649@kaneda.iguw.tuwien.ac.at>
@ 2009-12-23 21:10                   ` Asdo
  0 siblings, 0 replies; 18+ messages in thread
From: Asdo @ 2009-12-23 21:10 UTC (permalink / raw)
  To: Rainer Fuegenstein; +Cc: linux-raid

Rainer Fuegenstein wrote:
> hi,
>
> A> The --assemble --force needs correct order of drives to be specified!?!?
> A> I think it autodetects that
> A> (would be EXTREMELY RISKY otherwise...)
>
> oops, I didn't care about the order when --assembling :-(
>   
And it didn't blow up, so I was right :-D

> A> Rainer, just after starting the array you can:
> A>   mdadm --readonly /dev/md0
> A> so to be sure that no writes ever happen and a resync does not happen.
> A> I suggest to take data out before doing any modifications (such as a
> A> resync), if you can.
>
> tnx for the hint! have it mounted r/w right now, still copying the
> most important data to other media (for the next 24hours or so). do
> you think that I may run into any troubles if I unmount, reboot,
> re-assemble and mount r/o ?
>   
Probably you can put it readonly right now, with xfs already mounted. Or 
better you can put readonly the filesystem first, then the array: this 
is probably safer. (mount -o remount,ro ... then mdadm --readonly 
/dev/md0).

Hmm on second thought the raid device might refuse to go readonly if the 
filesystem is mounted.... but you can try and see, it shouldn't be risky.

Also do not reboot, and do not stop the array (it works so don't fix it 
:-D ). In the worst case you will have to unmount the filesystem, put 
the array readonly, then remount the filesystem with -o 
ro,nobarrier,norecovery .

> A> As MB suggests, it's better to keep the the most recently failed drive
> A> out of the array if possible, in order to have more coherent data. Also  
> A> true when you are going to add the first spare (that will cause a resync 
> A> and regeneration of one disk).
>
> since the bad sda is included at the moment - is it safe to remove it
> with mdadm /dev/md0 -r /dev/sda1 ?
>   
I'm not sure... your mdstat

  # cat /proc/mdstat
  Personalities : [raid6] [raid5] [raid4]
  md0 : active raid5 sdb1[0] sdc1[3] sdd1[1]
        4395407808 blocks level 5, 64k chunk, algorithm 2 [4/3] [UU_U]

shows sda1 is not included. (Probably resync started upon assemble and 
sda1 failed just immediately)
In addition the array is already degraded and it's a raid5 so you cannot 
remove another device: that would bring it down.

I'd try to put it readonly and then continue your backup.

Should you ever need to reassemble that array, I would specify the 
drives explicitly (as opposed to using --scan) and keep sda1 out of the 
list, as suggested by Majed B., like

  mdadm --assemble --force /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1

then put it readonly, remount, and continue your backup. After backup completed you can add sda1 but I would probably add it as a new spare, e.g. clearing the superblock first. (That drive / controller / cabling might be defective though... I'm not sure on how to interpret your dmesg.)


Merry Christmas everybody!

Asdo

^ permalink raw reply	[flat|nested] 18+ messages in thread

* Re: raid5: cannot start dirty degraded array
  2009-12-23 11:50 raid5: cannot start dirty degraded array Rainer Fuegenstein
  2009-12-23 12:50 ` Rainer Fuegenstein
@ 2009-12-23 13:13 ` spren.gm
  1 sibling, 0 replies; 18+ messages in thread
From: spren.gm @ 2009-12-23 13:13 UTC (permalink / raw)
  To: Rainer Fuegenstein, linux-raid@vger.kernel.org

>Dec 23 12:30:19 alfred kernel: md: bind<sdc1>
>Dec 23 12:30:19 alfred kernel: md: bind<sdd1>
>Dec 23 12:30:19 alfred kernel: md: running: <sdd1><sdc1><sdb1><sda1>
>Dec 23 12:30:19 alfred kernel: md: kicking non-fresh sda1 from array!
"non-fresh" is because of that "events" counter in superblock of sda1 is at least 2 lesser that others.

>Dec 23 12:30:19 alfred kernel: raid5: device sdc1 operational as raid disk 3
>Dec 23 12:30:19 alfred kernel: raid5: device sdb1 operational as raid disk 0
>Dec 23 12:30:19 alfred kernel: raid5: cannot start dirty degraded array for md0
here "dirty" results from system crash while writing data to the raid.
using "--froce" param with mdadm could start the raid, 
or md-mod has a param "start_dirty_degraded", if you load it with "start_dirty_degraded" set to 1, 
your raid5 could be started.
I think no more data would lose or corrupt if only doing raid start operation, but you should first get more 
replies and suggestion :)



^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2009-12-27 12:57 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-12-23 11:50 raid5: cannot start dirty degraded array Rainer Fuegenstein
2009-12-23 12:50 ` Rainer Fuegenstein
2009-12-23 13:25   ` Majed B.
2009-12-23 13:44     ` Re[2]: " Rainer Fuegenstein
2009-12-23 13:48       ` Majed B.
2009-12-23 14:02         ` Re[4]: " Rainer Fuegenstein
2009-12-23 14:04           ` Majed B.
2009-12-23 14:30             ` Re[6]: " Rainer Fuegenstein
2009-12-23 14:35               ` Majed B.
2009-12-23 15:13                 ` Re[8]: " Rainer Fuegenstein
2009-12-23 15:16                   ` Majed B.
2009-12-23 17:03                     ` Re[10]: " Rainer Fuegenstein
2009-12-23 18:22                       ` Justin Piszcz
2009-12-24 16:40                         ` Thomas Fjellstrom
2009-12-27 12:57                           ` 99-raid-check (was: raid5: cannot start dirty degraded array) Rainer Fuegenstein
2009-12-23 14:49               ` raid5: cannot start dirty degraded array Asdo
     [not found]                 ` <1339530534.20091223201649@kaneda.iguw.tuwien.ac.at>
2009-12-23 21:10                   ` Asdo
2009-12-23 13:13 ` spren.gm

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