* PLEASE HELP ... raid5 array degraded ...
@ 2006-07-12 3:09 Andrew Skolarz
2006-07-12 3:16 ` Andrew Skolarz
0 siblings, 1 reply; 6+ messages in thread
From: Andrew Skolarz @ 2006-07-12 3:09 UTC (permalink / raw)
To: linux-raid
as the topic says i was running a raid5 array. i was using this
because i assumed it wouldn't die .. even if i lost a drive. well, i
guess i was wrong :(
a little background .. i have 2 raid5 arrays. one is compromised of 4
200gb hd's (this crashed as of last night) and one is 4 300gb's. last
night, i was accessing a file on the 2x200 while my server decided to
crash. When i booted up today, the boot up sequence started yelling
at me that it couldn't load the reiserfs cause of a bad superblock.
upon further investigation i determined it wasn't the a bad superblock
in the reiserfs .. but rather one of the md superblocks on my hd's was
corrupt.
myth ~ # dmesg | grep md
md: raid0 personality registered as nr 2
md: raid5 personality registered as nr 4
md: md driver 0.90.2 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 3.38
md: Autodetecting RAID arrays.
md: invalid superblock checksum on hdl1
md: hdl1 has invalid sb, not importing!
md: autorun ...
md: considering hdk1 ...
md: adding hdk1 ...
md: adding hdj1 ...
md: adding hdi1 ...
md: created md0
md: bind<hdi1>
md: bind<hdj1>
md: bind<hdk1>
md: running: <hdk1><hdj1><hdi1>
md: md0: raid array is not clean -- starting background reconstruction
raid5: cannot start dirty degraded array for md0
raid5: failed to run raid set md0
md: pers->run() failed ...
md: do_md_run() returned -5
md: md0 stopped.
md: unbind<hdk1>
md: export_rdev(hdk1)
md: unbind<hdj1>
md: export_rdev(hdj1)
md: unbind<hdi1>
md: export_rdev(hdi1)
md: ... autorun DONE.
is the whole array dead ?? is there no way to recover the 450gb of
data i have on there ?
i tried even unplugging /dev/hdl and prayed it would start up with
just 3 drives (like raid5 should) but no luck .. just like here
without that drive, it doesn't want to reconstruct.
PLEASE HELP and tell me that my data is not lost .. i beg you
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: PLEASE HELP ... raid5 array degraded ...
2006-07-12 3:09 PLEASE HELP ... raid5 array degraded Andrew Skolarz
@ 2006-07-12 3:16 ` Andrew Skolarz
2006-07-12 4:10 ` Andrew Skolarz
2006-07-18 2:20 ` PLEASE HELP ... raid5 array degraded Neil Brown
0 siblings, 2 replies; 6+ messages in thread
From: Andrew Skolarz @ 2006-07-12 3:16 UTC (permalink / raw)
To: linux-raid
i performed mdadm -E on the devices in the array
myth ~ # mdadm -E /dev/hdi1
/dev/hdi1:
Magic : a92b4efc
Version : 00.90.02
UUID : 9ab2395c:b39cfe1c:ba195ea0:0505eb9d
Creation Time : Mon Dec 26 13:41:06 2005
Raid Level : raid5
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Mon Jul 10 21:43:11 2006
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 4aaf93b4 - correct
Events : 0.428721
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 56 1 0 active sync /dev/hdi1
0 0 56 1 0 active sync /dev/hdi1
1 1 56 65 1 active sync /dev/hdj1
2 2 57 1 2 active sync /dev/hdk1
3 3 57 65 3 active sync /dev/hdl1
myth ~ # mdadm -E /dev/hdj1
/dev/hdj1:
Magic : a92b4efc
Version : 00.90.02
UUID : 9ab2395c:b39cfe1c:ba195ea0:0505eb9d
Creation Time : Mon Dec 26 13:41:06 2005
Raid Level : raid5
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Mon Jul 10 21:43:11 2006
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 4aaf93f6 - correct
Events : 0.428721
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 56 65 1 active sync /dev/hdj1
0 0 56 1 0 active sync /dev/hdi1
1 1 56 65 1 active sync /dev/hdj1
2 2 57 1 2 active sync /dev/hdk1
3 3 57 65 3 active sync /dev/hdl1
myth ~ # mdadm -E /dev/hdk1
/dev/hdk1:
Magic : a92b4efc
Version : 00.90.02
UUID : 9ab2395c:b39cfe1c:ba195ea0:0505eb9d
Creation Time : Mon Dec 26 13:41:06 2005
Raid Level : raid5
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Mon Jul 10 21:43:11 2006
State : active
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 4aa90908 - correct
Events : 0.428722
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 57 1 2 active sync /dev/hdk1
0 0 56 1 0 active sync /dev/hdi1
1 1 56 65 1 active sync /dev/hdj1
2 2 57 1 2 active sync /dev/hdk1
3 3 57 65 3 active sync /dev/hdl1
myth ~ # mdadm -E /dev/hdl1
/dev/hdl1:
Magic : a92b4efc
Version : 00.90.02
UUID : 9ab2395c:b39cfe1c:ba195ea0:0505eb9d
Creation Time : Mon Dec 26 13:41:06 2005
Raid Level : raid5
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Mon Jul 10 21:43:11 2006
State : active
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 4aa9094a - expected 4aa908c4
Events : 0.428722
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 0 0 0 spare
0 0 56 1 0 active sync /dev/hdi1
1 1 56 65 1 active sync /dev/hdj1
2 2 57 1 2 active sync /dev/hdk1
3 3 57 65 3 active sync /dev/hdl1
it does report as hdk having a bad checksum .. but the other 3 drives
seem okay .. hopefully i can restore my data ... but why isn't it
loading up in a 3 drive config ??
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2006-07-18 2:20 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-07-12 3:09 PLEASE HELP ... raid5 array degraded Andrew Skolarz
2006-07-12 3:16 ` Andrew Skolarz
2006-07-12 4:10 ` Andrew Skolarz
2006-07-15 14:03 ` PLEASE HELP ... raid5 array degraded - how fix it? Dexter Filmore
2006-07-15 17:29 ` Andrew Skolarz
2006-07-18 2:20 ` PLEASE HELP ... raid5 array degraded Neil Brown
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