* RAID5+spare volume gone - mdadm sees RAID1 only?
@ 2013-09-22 18:02 P Agenbag
2013-09-22 21:45 ` Phil Turmel
0 siblings, 1 reply; 4+ messages in thread
From: P Agenbag @ 2013-09-22 18:02 UTC (permalink / raw)
To: linux-raid
Hi List
I have a D-Link DNS345 NAS which I configured as RAID5 + spare with 4x
500GB Seagate SATA drives.
I suspect a power surge caused the NAS to suddenly lose the volume.
All 4 drives checked out OK when doing a SMART test on the NAS itself.
I proceeded to build all 4 drives into a CentOS server, but was unable
to mount the RAID5 - error is always "not enough drives".
I followed some advise in archives, and did some mdadm -- examines,
and echo them below - what I don't understand is why the --examine
picks them up as RAID1.
Is there anything I can do to re-build this array?
Appreciate any help/advise.
Regards
/dev/sda1:
Magic : a92b4efc
Version : 0.90.00
UUID : 17888794:50a497c7:f853c57d:313558dc
Creation Time : Sat Sep 21 11:19:13 2013
Raid Level : raid1
Used Dev Size : 524224 (512.02 MiB 536.81 MB)
Array Size : 524224 (512.02 MiB 536.81 MB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Sun Sep 22 12:20:23 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : df65b6a0 - correct
Events : 6
Number Major Minor RaidDevice State
this 3 8 1 3 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 33 2 active sync /dev/sdc1
3 3 8 1 3 active sync /dev/sda1
/dev/sdb1:
Magic : a92b4efc
Version : 0.90.00
UUID : 17888794:50a497c7:f853c57d:313558dc
Creation Time : Sat Sep 21 11:19:13 2013
Raid Level : raid1
Used Dev Size : 524224 (512.02 MiB 536.81 MB)
Array Size : 524224 (512.02 MiB 536.81 MB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Sun Sep 22 12:20:23 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : df65b6aa - correct
Events : 6
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 8 33 2 active sync /dev/sdc1
3 3 8 1 3 active sync /dev/sda1
/dev/sdc1:
Magic : a92b4efc
Version : 0.90.00
UUID : 17888794:50a497c7:f853c57d:313558dc
Creation Time : Sat Sep 21 11:19:13 2013
Raid Level : raid1
Used Dev Size : 524224 (512.02 MiB 536.81 MB)
Array Size : 524224 (512.02 MiB 536.81 MB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Sun Sep 22 12:20:23 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : df65b6be - correct
Events : 6
Number Major Minor RaidDevice State
this 2 8 33 2 active sync /dev/sdc1
0 0 8 17 0 active sync /dev/sdb1
1 1 8 49 1 active sync /dev/sdd1
2 2 8 33 2 active sync /dev/sdc1
3 3 8 1 3 active sync /dev/sda1
/dev/sdd1:
Magic : a92b4efc
Version : 0.90.00
UUID : 17888794:50a497c7:f853c57d:313558dc
Creation Time : Sat Sep 21 11:19:13 2013
Raid Level : raid1
Used Dev Size : 524224 (512.02 MiB 536.81 MB)
Array Size : 524224 (512.02 MiB 536.81 MB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Sun Sep 22 12:20:23 2013
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : df65b6cc - correct
Events : 6
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 8 33 2 active sync /dev/sdc1
3 3 8 1 3 active sync /dev/sda1
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: RAID5+spare volume gone - mdadm sees RAID1 only?
2013-09-22 18:02 RAID5+spare volume gone - mdadm sees RAID1 only? P Agenbag
@ 2013-09-22 21:45 ` Phil Turmel
2013-09-23 5:15 ` P Agenbag
0 siblings, 1 reply; 4+ messages in thread
From: Phil Turmel @ 2013-09-22 21:45 UTC (permalink / raw)
To: P Agenbag; +Cc: linux-raid
On 09/22/2013 02:02 PM, P Agenbag wrote:
> Hi List
>
> I have a D-Link DNS345 NAS which I configured as RAID5 + spare with 4x
> 500GB Seagate SATA drives.
>
> I suspect a power surge caused the NAS to suddenly lose the volume.
>
> All 4 drives checked out OK when doing a SMART test on the NAS itself.
> I proceeded to build all 4 drives into a CentOS server, but was unable
> to mount the RAID5 - error is always "not enough drives".
>
> I followed some advise in archives, and did some mdadm -- examines,
> and echo them below - what I don't understand is why the --examine
> picks them up as RAID1.
>
> Is there anything I can do to re-build this array?
The "mdadm --examine" info you gave is clearly for the NAS boot
volume--it is only 1/2 GB--and would be expected to be raid1.
Please take a closer look at your partition tables....
Share them here if you can't get further, and include "mdadm --examine"
from all other partitions that have raid superblocks.
Phil
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: RAID5+spare volume gone - mdadm sees RAID1 only?
2013-09-22 21:45 ` Phil Turmel
@ 2013-09-23 5:15 ` P Agenbag
2013-09-23 12:40 ` Phil Turmel
0 siblings, 1 reply; 4+ messages in thread
From: P Agenbag @ 2013-09-23 5:15 UTC (permalink / raw)
To: Phil Turmel; +Cc: linux-raid
Hi Phil
Below, please find the output of the mdadm --examine on the 4 drive's
second partitions. Apologies for omitting that in the first e-mail.
Appreciate your help.
Regards
/dev/sda2:
Magic : a92b4efc
Version : 0.90.00
UUID : 7cdbaa07:ebe66d1b:e9ffe775:cc34485e
Creation Time : Wed Sep 19 18:30:28 2012
Raid Level : raid5
Used Dev Size : 485762944 (463.26 GiB 497.42 GB)
Array Size : 1457288832 (1389.78 GiB 1492.26 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Tue Apr 25 08:11:59 2000
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 6e7a32c7 - correct
Events : 140493
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 50 3 active sync /dev/sdd2
0 0 8 2 0 active sync /dev/sda2
1 1 8 18 1 active sync /dev/sdb2
2 2 8 34 2 active sync /dev/sdc2
3 3 8 50 3 active sync /dev/sdd2
/dev/sdb2:
Magic : a92b4efc
Version : 0.90.00
UUID : 7cdbaa07:ebe66d1b:e9ffe775:cc34485e
Creation Time : Wed Sep 19 18:30:28 2012
Raid Level : raid5
Used Dev Size : 485762944 (463.26 GiB 497.42 GB)
Array Size : 1457288832 (1389.78 GiB 1492.26 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Tue Apr 25 08:11:59 2000
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 6e7a3291 - correct
Events : 140493
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 8 2 0 active sync /dev/sda2
0 0 8 2 0 active sync /dev/sda2
1 1 8 18 1 active sync /dev/sdb2
2 2 8 34 2 active sync /dev/sdc2
3 3 8 50 3 active sync /dev/sdd2
/dev/sdc2:
Magic : a92b4efc
Version : 0.90.00
UUID : 7cdbaa07:ebe66d1b:e9ffe775:cc34485e
Creation Time : Wed Sep 19 18:30:28 2012
Raid Level : raid5
Used Dev Size : 485762944 (463.26 GiB 497.42 GB)
Array Size : 1457288832 (1389.78 GiB 1492.26 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Tue Apr 25 08:11:59 2000
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 6e7a32b5 - correct
Events : 140493
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 34 2 active sync /dev/sdc2
0 0 8 2 0 active sync /dev/sda2
1 1 8 18 1 active sync /dev/sdb2
2 2 8 34 2 active sync /dev/sdc2
3 3 8 50 3 active sync /dev/sdd2
/dev/sdd2:
Magic : a92b4efc
Version : 0.90.00
UUID : 7cdbaa07:ebe66d1b:e9ffe775:cc34485e
Creation Time : Wed Sep 19 18:30:28 2012
Raid Level : raid5
Used Dev Size : 485762944 (463.26 GiB 497.42 GB)
Array Size : 1457288832 (1389.78 GiB 1492.26 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 1
Update Time : Tue Apr 25 11:16:28 2000
State : clean
Active Devices : 1
Working Devices : 1
Failed Devices : 2
Spare Devices : 0
Checksum : 6e7a5e3b - correct
Events : 140520
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 18 1 active sync /dev/sdb2
0 0 0 0 0 removed
1 1 8 18 1 active sync /dev/sdb2
2 2 0 0 2 faulty removed
3 3 0 0 3 faulty removed
On Sun, Sep 22, 2013 at 11:45 PM, Phil Turmel <philip@turmel.org> wrote:
> On 09/22/2013 02:02 PM, P Agenbag wrote:
>> Hi List
>>
>> I have a D-Link DNS345 NAS which I configured as RAID5 + spare with 4x
>> 500GB Seagate SATA drives.
>>
>> I suspect a power surge caused the NAS to suddenly lose the volume.
>>
>> All 4 drives checked out OK when doing a SMART test on the NAS itself.
>> I proceeded to build all 4 drives into a CentOS server, but was unable
>> to mount the RAID5 - error is always "not enough drives".
>>
>> I followed some advise in archives, and did some mdadm -- examines,
>> and echo them below - what I don't understand is why the --examine
>> picks them up as RAID1.
>>
>> Is there anything I can do to re-build this array?
>
> The "mdadm --examine" info you gave is clearly for the NAS boot
> volume--it is only 1/2 GB--and would be expected to be raid1.
>
> Please take a closer look at your partition tables....
>
> Share them here if you can't get further, and include "mdadm --examine"
> from all other partitions that have raid superblocks.
>
> Phil
>
> --
> 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] 4+ messages in thread* Re: RAID5+spare volume gone - mdadm sees RAID1 only?
2013-09-23 5:15 ` P Agenbag
@ 2013-09-23 12:40 ` Phil Turmel
0 siblings, 0 replies; 4+ messages in thread
From: Phil Turmel @ 2013-09-23 12:40 UTC (permalink / raw)
To: P Agenbag; +Cc: linux-raid
Good morning,
[Please trim replies, and avoid top-posting]
On 09/23/2013 01:15 AM, P Agenbag wrote:
> Hi Phil
>
> Below, please find the output of the mdadm --examine on the 4 drive's
> second partitions. Apologies for omitting that in the first e-mail.
>
> Appreciate your help.
[trim /]
So it appears /dev/sd[abc]2 all dropped out together, leaving sdd2 by
itself. As such, you should be able to force assembly and carry on.
mdadm -Af /dev/md1 /dev/sd[abcd]2
Then you can take a backup of the critical contents, if necessary. (You
haven't said how important the data is...)
Phil
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-09-23 12:40 UTC | newest]
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2013-09-22 18:02 RAID5+spare volume gone - mdadm sees RAID1 only? P Agenbag
2013-09-22 21:45 ` Phil Turmel
2013-09-23 5:15 ` P Agenbag
2013-09-23 12:40 ` Phil Turmel
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