* Recovering raid6 with 3 of 12 disks
@ 2012-03-14 18:29 Larkin Lowrey
2012-03-14 19:26 ` NeilBrown
0 siblings, 1 reply; 3+ messages in thread
From: Larkin Lowrey @ 2012-03-14 18:29 UTC (permalink / raw)
To: linux-raid
Thanks to mvsas not hanlding drives in standby (spun down) well, 9 of my
drives got kicked out of the array. Fortunately, the logical volume on
that array was not mounted so the data on the array should be fine.
Needless to say, I can't assemble the array with only 3 disks. My best
understanding is that I need to re-create the array with --assume-clean
and that I need to specify the drives in their original order (and not
use any shell globbing like /dev/sd[k-r]).
Q1: The original metadata was 0.90. I've read that it would be safe to
re-create the array with 1.0 metadata because the superblocks are stored
at the same location and are smaller than 0.90 superblocks. Please confirm.
Q2: Given the output of mdadm -E the tail of this e-mail, would the
command below be correct?
mdadm --assemble /dev/md2 --assume-clean --level=6 --chunk=128
--raid-devices=12 --metadata=1.0 /dev/sdn2 /dev/sdk2 /dev/sdl2 /dev/sdm2
/dev/sdy1 /dev/sdp2 /dev/sdo2 /dev/sdr2 /dev/sdq2 /dev/sdw1 /dev/sdx1
/dev/sdz1
Q3: To verify that I have the drives in order I should be able to run a
'check' and watch the missmatch count. If the count is substantially
non-zero then I have the drives in the wrong order. Would it be safe to
'try again' until I get the right combo?
Thank you for your attention and any assistance you can offer.
--Larkin
/dev/sdw1:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 11
Preferred Minor : 2
Update Time : Wed Mar 14 03:16:48 2012
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 8
Spare Devices : 0
Checksum : bdaa1605 - correct
Events : 1647040
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 9 65 113 9 active sync /dev/sdx1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 0 0 2 faulty removed
3 3 0 0 3 faulty removed
4 4 0 0 4 faulty removed
5 5 0 0 5 faulty removed
6 6 0 0 6 faulty removed
7 7 0 0 7 faulty removed
8 8 0 0 8 faulty removed
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdx1:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 11
Preferred Minor : 2
Update Time : Wed Mar 14 03:16:48 2012
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 8
Spare Devices : 0
Checksum : bdaa1617 - correct
Events : 1647040
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 10 65 129 10 active sync /dev/sdy1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 0 0 2 faulty removed
3 3 0 0 3 faulty removed
4 4 0 0 4 faulty removed
5 5 0 0 5 faulty removed
6 6 0 0 6 faulty removed
7 7 0 0 7 faulty removed
8 8 0 0 8 faulty removed
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdy1:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c7df - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 4 65 145 4 active sync /dev/sdz1
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdz1:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 11
Preferred Minor : 2
Update Time : Wed Mar 14 03:16:48 2012
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 8
Spare Devices : 0
Checksum : bdaa15f9 - correct
Events : 1647040
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 11 65 97 11 active sync /dev/sdw1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 0 0 2 faulty removed
3 3 0 0 3 faulty removed
4 4 0 0 4 faulty removed
5 5 0 0 5 faulty removed
6 6 0 0 6 faulty removed
7 7 0 0 7 faulty removed
8 8 0 0 8 faulty removed
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdk2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c7f1 - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 1 8 226 1 active sync /dev/sdo2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdl2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c803 - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 2 8 242 2 active sync /dev/sdp2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdm2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c74e - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 3 65 2 3 active sync /dev/sdq2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdn2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c758 - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 0 65 18 0 active sync /dev/sdr2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdo2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c7bb - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 6 8 162 6 active sync /dev/sdk2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdp2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c7c9 - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 5 8 178 5 active sync /dev/sdl2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdq2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c7df - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 8 8 194 8 active sync /dev/sdm2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
/dev/sdr2:
Magic : a92b4efc
Version : 0.90.00
UUID : 08b30a7c:151f719c:e2349310:51678405
Creation Time : Fri May 7 21:44:25 2010
Raid Level : raid6
Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
Raid Devices : 12
Total Devices : 12
Preferred Minor : 2
Update Time : Tue Mar 13 21:46:30 2012
State : clean
Active Devices : 12
Working Devices : 12
Failed Devices : 0
Spare Devices : 0
Checksum : bda9c7ed - correct
Events : 1647037
Layout : left-symmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 7 8 210 7 active sync /dev/sdn2
0 0 65 18 0 active sync /dev/sdr2
1 1 8 226 1 active sync /dev/sdo2
2 2 8 242 2 active sync /dev/sdp2
3 3 65 2 3 active sync /dev/sdq2
4 4 65 145 4 active sync /dev/sdz1
5 5 8 178 5 active sync /dev/sdl2
6 6 8 162 6 active sync /dev/sdk2
7 7 8 210 7 active sync /dev/sdn2
8 8 8 194 8 active sync /dev/sdm2
9 9 65 113 9 active sync /dev/sdx1
10 10 65 129 10 active sync /dev/sdy1
11 11 65 97 11 active sync /dev/sdw1
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Recovering raid6 with 3 of 12 disks
2012-03-14 18:29 Recovering raid6 with 3 of 12 disks Larkin Lowrey
@ 2012-03-14 19:26 ` NeilBrown
2012-03-14 20:42 ` Larkin Lowrey
0 siblings, 1 reply; 3+ messages in thread
From: NeilBrown @ 2012-03-14 19:26 UTC (permalink / raw)
To: Larkin Lowrey; +Cc: linux-raid
[-- Attachment #1: Type: text/plain, Size: 21489 bytes --]
On Wed, 14 Mar 2012 13:29:05 -0500 Larkin Lowrey <llowrey@nuclearwinter.com>
wrote:
> Thanks to mvsas not hanlding drives in standby (spun down) well, 9 of my
> drives got kicked out of the array. Fortunately, the logical volume on
> that array was not mounted so the data on the array should be fine.
>
> Needless to say, I can't assemble the array with only 3 disks. My best
> understanding is that I need to re-create the array with --assume-clean
> and that I need to specify the drives in their original order (and not
> use any shell globbing like /dev/sd[k-r]).
You should be able to assemble the array if you add '--force'.
>
> Q1: The original metadata was 0.90. I've read that it would be safe to
> re-create the array with 1.0 metadata because the superblocks are stored
> at the same location and are smaller than 0.90 superblocks. Please confirm.
correct.
>
> Q2: Given the output of mdadm -E the tail of this e-mail, would the
> command below be correct?
>
> mdadm --assemble /dev/md2 --assume-clean --level=6 --chunk=128
> --raid-devices=12 --metadata=1.0 /dev/sdn2 /dev/sdk2 /dev/sdl2 /dev/sdm2
> /dev/sdy1 /dev/sdp2 /dev/sdo2 /dev/sdr2 /dev/sdq2 /dev/sdw1 /dev/sdx1
> /dev/sdz1
I didn't check all the devices, but the first one is definitely /dev/sdn2, so
you used the right algorithm.
>
> Q3: To verify that I have the drives in order I should be able to run a
> 'check' and watch the missmatch count. If the count is substantially
> non-zero then I have the drives in the wrong order. Would it be safe to
> 'try again' until I get the right combo?
Yes - it wouldn't help for RAID5, but it would for RAID6.
NeilBrown
>
> Thank you for your attention and any assistance you can offer.
>
> --Larkin
>
> /dev/sdw1:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 11
> Preferred Minor : 2
>
> Update Time : Wed Mar 14 03:16:48 2012
> State : clean
> Active Devices : 3
> Working Devices : 3
> Failed Devices : 8
> Spare Devices : 0
> Checksum : bdaa1605 - correct
> Events : 1647040
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 9 65 113 9 active sync /dev/sdx1
>
> 0 0 0 0 0 removed
> 1 1 0 0 1 faulty removed
> 2 2 0 0 2 faulty removed
> 3 3 0 0 3 faulty removed
> 4 4 0 0 4 faulty removed
> 5 5 0 0 5 faulty removed
> 6 6 0 0 6 faulty removed
> 7 7 0 0 7 faulty removed
> 8 8 0 0 8 faulty removed
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdx1:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 11
> Preferred Minor : 2
>
> Update Time : Wed Mar 14 03:16:48 2012
> State : clean
> Active Devices : 3
> Working Devices : 3
> Failed Devices : 8
> Spare Devices : 0
> Checksum : bdaa1617 - correct
> Events : 1647040
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 10 65 129 10 active sync /dev/sdy1
>
> 0 0 0 0 0 removed
> 1 1 0 0 1 faulty removed
> 2 2 0 0 2 faulty removed
> 3 3 0 0 3 faulty removed
> 4 4 0 0 4 faulty removed
> 5 5 0 0 5 faulty removed
> 6 6 0 0 6 faulty removed
> 7 7 0 0 7 faulty removed
> 8 8 0 0 8 faulty removed
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdy1:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c7df - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 4 65 145 4 active sync /dev/sdz1
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdz1:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 11
> Preferred Minor : 2
>
> Update Time : Wed Mar 14 03:16:48 2012
> State : clean
> Active Devices : 3
> Working Devices : 3
> Failed Devices : 8
> Spare Devices : 0
> Checksum : bdaa15f9 - correct
> Events : 1647040
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 11 65 97 11 active sync /dev/sdw1
>
> 0 0 0 0 0 removed
> 1 1 0 0 1 faulty removed
> 2 2 0 0 2 faulty removed
> 3 3 0 0 3 faulty removed
> 4 4 0 0 4 faulty removed
> 5 5 0 0 5 faulty removed
> 6 6 0 0 6 faulty removed
> 7 7 0 0 7 faulty removed
> 8 8 0 0 8 faulty removed
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdk2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c7f1 - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 1 8 226 1 active sync /dev/sdo2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdl2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c803 - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 2 8 242 2 active sync /dev/sdp2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdm2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c74e - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 3 65 2 3 active sync /dev/sdq2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdn2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c758 - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 0 65 18 0 active sync /dev/sdr2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdo2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c7bb - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 6 8 162 6 active sync /dev/sdk2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdp2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c7c9 - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 5 8 178 5 active sync /dev/sdl2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdq2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c7df - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 8 8 194 8 active sync /dev/sdm2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> /dev/sdr2:
> Magic : a92b4efc
> Version : 0.90.00
> UUID : 08b30a7c:151f719c:e2349310:51678405
> Creation Time : Fri May 7 21:44:25 2010
> Raid Level : raid6
> Used Dev Size : 664191232 (633.42 GiB 680.13 GB)
> Array Size : 6641912320 (6334.22 GiB 6801.32 GB)
> Raid Devices : 12
> Total Devices : 12
> Preferred Minor : 2
>
> Update Time : Tue Mar 13 21:46:30 2012
> State : clean
> Active Devices : 12
> Working Devices : 12
> Failed Devices : 0
> Spare Devices : 0
> Checksum : bda9c7ed - correct
> Events : 1647037
>
> Layout : left-symmetric
> Chunk Size : 128K
>
> Number Major Minor RaidDevice State
> this 7 8 210 7 active sync /dev/sdn2
>
> 0 0 65 18 0 active sync /dev/sdr2
> 1 1 8 226 1 active sync /dev/sdo2
> 2 2 8 242 2 active sync /dev/sdp2
> 3 3 65 2 3 active sync /dev/sdq2
> 4 4 65 145 4 active sync /dev/sdz1
> 5 5 8 178 5 active sync /dev/sdl2
> 6 6 8 162 6 active sync /dev/sdk2
> 7 7 8 210 7 active sync /dev/sdn2
> 8 8 8 194 8 active sync /dev/sdm2
> 9 9 65 113 9 active sync /dev/sdx1
> 10 10 65 129 10 active sync /dev/sdy1
> 11 11 65 97 11 active sync /dev/sdw1
> --
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Recovering raid6 with 3 of 12 disks
2012-03-14 19:26 ` NeilBrown
@ 2012-03-14 20:42 ` Larkin Lowrey
0 siblings, 0 replies; 3+ messages in thread
From: Larkin Lowrey @ 2012-03-14 20:42 UTC (permalink / raw)
To: NeilBrown; +Cc: linux-raid
On 3/14/2012 2:26 PM, NeilBrown wrote:
> You should be able to assemble the array if you add '--force'.
That worked perfectly. Thank you!
--Larkin
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-03-14 20:42 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2012-03-14 18:29 Recovering raid6 with 3 of 12 disks Larkin Lowrey
2012-03-14 19:26 ` NeilBrown
2012-03-14 20:42 ` Larkin Lowrey
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