* Time to ask for help. Raid-5 Dual drive failure
@ 2008-11-04 21:18 Brad Campbell
2008-11-05 8:50 ` Solved : " Brad Campbell
0 siblings, 1 reply; 2+ messages in thread
From: Brad Campbell @ 2008-11-04 21:18 UTC (permalink / raw)
To: RAID Linux
Ok, so it finally died.
I was doing a large copy to an ext3 filesystem on md0 when one drive dropped out (SATA error). 3
minutes later a second drive dropped out (SATA error).
I've tried to re-assemble the array with
mdadm --assemble --force /dev/md0 but it errors out with
mdadm: failed to RUN_ARRAY /dev/md0: Input/output error
I'm guessing that I'll have to re-create the array with --assume-clean and the 9 freshest drives and
hope for the best. I've included pretty much all the information I guess might be relevant. Please
let me know if I've forgotten something. I'm not sure of the best action to take next to ensure I do
the least amount of damage.
None of the data on there is really unrecoverable, but it would be a significant effort to
re-compile it from its various sources. If I can get most or all of it back (and I was doing a very
large sequential write at the time which ext3 seems to cope with quite well in cases of drive
b0rkage) I'd be pretty happy.
I've tried absolutely nothing other than --assemble --force. (Several times after reboots)
root@srv:~# uname -a
Linux srv 2.6.27.4 #10 SMP Mon Oct 27 08:59:56 GST 2008 x86_64 GNU/Linux
root@srv:~# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md0 : inactive sdk1[1] sdg[9] sdf1[8] sdi1[7] sdh1[6] sdn1[5] sdo1[4] sdm1[3] sdl[2]
2204177664 blocks
md2 : active raid5 sdc[0] sde[2] sdd[1]
1465148928 blocks level 5, 128k chunk, algorithm 2 [3/3] [UUU]
md5 : active raid1 sda4[0] sdb4[1]
200217984 blocks [2/2] [UU]
md4 : active (auto-read-only) raid1 sda3[0] sdb3[1]
4891712 blocks [2/2] [UU]
md3 : active raid1 sda2[0] sdb2[1]
19542976 blocks [2/2] [UU]
md1 : active raid1 sdb1[0] sda1[1]
19542976 blocks [2/2] [UU]
bitmap: 1/150 pages [4KB], 64KB chunk
unused devices: <none>
(Tried with both)
root@srv:~# mdadm --version
mdadm - v2.6.4 - 19th October 2007
root@srv:~# ./mdadm --version
mdadm - v2.6.7 - 6th June 2008
root@srv:~# ./mdadm -Av --force /dev/md0
mdadm: looking for devices for /dev/md0
mdadm: cannot open device /dev/md2: Device or resource busy
mdadm: /dev/md2 has wrong uuid.
mdadm: cannot open device /dev/md5: Device or resource busy
mdadm: /dev/md5 has wrong uuid.
mdadm: cannot open device /dev/md4: Device or resource busy
mdadm: /dev/md4 has wrong uuid.
mdadm: cannot open device /dev/md3: Device or resource busy
mdadm: /dev/md3 has wrong uuid.
mdadm: cannot open device /dev/md1: Device or resource busy
mdadm: /dev/md1 has wrong uuid.
mdadm: no RAID superblock on /dev/sdo
mdadm: /dev/sdo has wrong uuid.
mdadm: no RAID superblock on /dev/sdn
mdadm: /dev/sdn has wrong uuid.
mdadm: no RAID superblock on /dev/sdm
mdadm: /dev/sdm has wrong uuid.
mdadm: no RAID superblock on /dev/sdk
mdadm: /dev/sdk has wrong uuid.
mdadm: no RAID superblock on /dev/sdj
mdadm: /dev/sdj has wrong uuid.
mdadm: no RAID superblock on /dev/sdi
mdadm: /dev/sdi has wrong uuid.
mdadm: no RAID superblock on /dev/sdh
mdadm: /dev/sdh has wrong uuid.
mdadm: no RAID superblock on /dev/sdf
mdadm: /dev/sdf has wrong uuid.
mdadm: cannot open device /dev/sde: Device or resource busy
mdadm: /dev/sde has wrong uuid.
mdadm: cannot open device /dev/sdd: Device or resource busy
mdadm: /dev/sdd has wrong uuid.
mdadm: cannot open device /dev/sdc: Device or resource busy
mdadm: /dev/sdc has wrong uuid.
mdadm: cannot open device /dev/sdb4: Device or resource busy
mdadm: /dev/sdb4 has wrong uuid.
mdadm: cannot open device /dev/sdb3: Device or resource busy
mdadm: /dev/sdb3 has wrong uuid.
mdadm: cannot open device /dev/sdb2: Device or resource busy
mdadm: /dev/sdb2 has wrong uuid.
mdadm: cannot open device /dev/sdb1: Device or resource busy
mdadm: /dev/sdb1 has wrong uuid.
mdadm: cannot open device /dev/sdb: Device or resource busy
mdadm: /dev/sdb has wrong uuid.
mdadm: cannot open device /dev/sda4: Device or resource busy
mdadm: /dev/sda4 has wrong uuid.
mdadm: cannot open device /dev/sda3: Device or resource busy
mdadm: /dev/sda3 has wrong uuid.
mdadm: cannot open device /dev/sda2: Device or resource busy
mdadm: /dev/sda2 has wrong uuid.
mdadm: cannot open device /dev/sda1: Device or resource busy
mdadm: /dev/sda1 has wrong uuid.
mdadm: cannot open device /dev/sda: Device or resource busy
mdadm: /dev/sda has wrong uuid.
mdadm: /dev/sdo1 is identified as a member of /dev/md0, slot 4.
mdadm: /dev/sdn1 is identified as a member of /dev/md0, slot 5.
mdadm: /dev/sdm1 is identified as a member of /dev/md0, slot 3.
mdadm: /dev/sdl is identified as a member of /dev/md0, slot 2.
mdadm: /dev/sdk1 is identified as a member of /dev/md0, slot 1.
mdadm: /dev/sdj1 is identified as a member of /dev/md0, slot 0.
mdadm: /dev/sdi1 is identified as a member of /dev/md0, slot 7.
mdadm: /dev/sdh1 is identified as a member of /dev/md0, slot 6.
mdadm: /dev/sdg is identified as a member of /dev/md0, slot 9.
mdadm: /dev/sdf1 is identified as a member of /dev/md0, slot 8.
mdadm: added /dev/sdj1 to /dev/md0 as 0
mdadm: added /dev/sdl to /dev/md0 as 2
mdadm: added /dev/sdm1 to /dev/md0 as 3
mdadm: added /dev/sdo1 to /dev/md0 as 4
mdadm: added /dev/sdn1 to /dev/md0 as 5
mdadm: added /dev/sdh1 to /dev/md0 as 6
mdadm: added /dev/sdi1 to /dev/md0 as 7
mdadm: added /dev/sdf1 to /dev/md0 as 8
mdadm: added /dev/sdg to /dev/md0 as 9
mdadm: added /dev/sdk1 to /dev/md0 as 1
mdadm: failed to RUN_ARRAY /dev/md0: Input/output error
for i in sdj1 sdl sdm1 sdo1 sdn1 sdh1 sdi1 sdf1 sdg sdk1 ; do mdadm --examine /dev/$i ; done
/dev/sdj1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:23:33 2008
State : active
Active Devices : 10
Working Devices : 10
Failed Devices : 0
Spare Devices : 0
Checksum : 210701c1 - correct
Events : 0.1338267
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 0 8 145 0 active sync /dev/sdj1
0 0 8 145 0 active sync /dev/sdj1
1 1 8 161 1 active sync /dev/sdk1
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdl:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b6ffb - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 2 8 176 2 active sync /dev/sdl
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdm1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b700e - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 3 8 193 3 active sync /dev/sdm1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdo1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b7030 - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 4 8 225 4 active sync /dev/sdo1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdn1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b7022 - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 5 8 209 5 active sync /dev/sdn1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdh1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b6fc4 - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 6 8 113 6 active sync /dev/sdh1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdi1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b6fd6 - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 7 8 129 7 active sync /dev/sdi1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdf1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b6fa8 - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 8 8 81 8 active sync /dev/sdf1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdg:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:32:56 2008
State : clean
Active Devices : 8
Working Devices : 8
Failed Devices : 1
Spare Devices : 0
Checksum : 211b6fb9 - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 9 8 96 9 active sync /dev/sdg
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
/dev/sdk1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:27:34 2008
State : active
Active Devices : 9
Working Devices : 9
Failed Devices : 0
Spare Devices : 0
Checksum : 210702e6 - correct
Events : 0.1338280
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 1 8 161 1 active sync /dev/sdk1
0 0 0 0 0 removed
1 1 8 161 1 active sync /dev/sdk1
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
< mdadm failure E-mail 1 >
This is an automatically generated mail message from mdadm
running on srv
A Fail event had been detected on md device /dev/md0.
It could be related to component device /dev/sdj1.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md0 : active raid5 sdm1[3] sdj1[10](F) sdg[9] sdf1[8] sdi1[7] sdh1[6] sdn1[5] sdo1[4] sdl[2] sdk1[1]
2197785600 blocks level 5, 128k chunk, algorithm 0 [10/9] [_UUUUUUUUU]
md2 : active raid5 sdc[0] sde[2] sdd[1]
1465148928 blocks level 5, 128k chunk, algorithm 2 [3/3] [UUU]
md5 : active raid1 sda4[0] sdb4[1]
200217984 blocks [2/2] [UU]
md4 : active raid1 sda3[0] sdb3[1]
4891712 blocks [2/2] [UU]
md3 : active raid1 sda2[0] sdb2[1]
19542976 blocks [2/2] [UU]
md1 : active raid1 sdb1[0] sda1[1]
19542976 blocks [2/2] [UU]
bitmap: 9/150 pages [36KB], 64KB chunk
unused devices: <none>
< mdadm failure E-mail 2 >
This is an automatically generated mail message from mdadm
running on srv
A Fail event had been detected on md device /dev/md0.
It could be related to component device /dev/sdj1.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md0 : active raid5 sdm1[3] sdj1[10](F) sdg[9] sdf1[8] sdi1[7] sdh1[6] sdn1[5] sdo1[4] sdl[2] sdk1[1]
2197785600 blocks level 5, 128k chunk, algorithm 0 [10/9] [_UUUUUUUUU]
md2 : active raid5 sdc[0] sde[2] sdd[1]
1465148928 blocks level 5, 128k chunk, algorithm 2 [3/3] [UUU]
md5 : active raid1 sda4[0] sdb4[1]
200217984 blocks [2/2] [UU]
md4 : active raid1 sda3[0] sdb3[1]
4891712 blocks [2/2] [UU]
md3 : active raid1 sda2[0] sdb2[1]
19542976 blocks [2/2] [UU]
md1 : active raid1 sdb1[0] sda1[1]
19542976 blocks [2/2] [UU]
bitmap: 9/150 pages [36KB], 64KB chunk
unused devices: <none>
< Dmesg from a latter attempt at --assemble --force >
[ 611.436668] md: md0 still in use.
[ 611.495356] md: bind<sdj1>
[ 611.495983] md: bind<sdl>
[ 611.496452] md: bind<sdm1>
[ 611.496977] md: bind<sdo1>
[ 611.497394] md: bind<sdn1>
[ 611.497883] md: bind<sdh1>
[ 611.498340] md: bind<sdi1>
[ 611.498792] md: bind<sdf1>
[ 611.499204] md: bind<sdg>
[ 611.499671] md: bind<sdk1>
[ 611.499982] md: kicking non-fresh sdj1 from array!
[ 611.500068] md: unbind<sdj1>
[ 611.522556] md: export_rdev(sdj1)
[ 611.522631] md: md0: raid array is not clean -- starting background reconstruction
[ 611.529874] raid5: device sdk1 operational as raid disk 1
[ 611.529926] raid5: device sdg operational as raid disk 9
[ 611.529967] raid5: device sdf1 operational as raid disk 8
[ 611.530008] raid5: device sdi1 operational as raid disk 7
[ 611.530048] raid5: device sdh1 operational as raid disk 6
[ 611.530087] raid5: device sdn1 operational as raid disk 5
[ 611.530126] raid5: device sdo1 operational as raid disk 4
[ 611.530165] raid5: device sdm1 operational as raid disk 3
[ 611.530203] raid5: device sdl operational as raid disk 2
[ 611.530242] raid5: cannot start dirty degraded array for md0
[ 611.530282] RAID5 conf printout:
[ 611.530311] --- rd:10 wd:9
[ 611.530339] disk 1, o:1, dev:sdk1
[ 611.530370] disk 2, o:1, dev:sdl
[ 611.530404] disk 3, o:1, dev:sdm1
[ 611.530435] disk 4, o:1, dev:sdo1
[ 611.530465] disk 5, o:1, dev:sdn1
[ 611.530496] disk 6, o:1, dev:sdh1
[ 611.530526] disk 7, o:1, dev:sdi1
[ 611.530557] disk 8, o:1, dev:sdf1
[ 611.530587] disk 9, o:1, dev:sdg
[ 611.530617] raid5: failed to run raid set md0
[ 611.530651] md: pers->run() failed ...
Regards,
Brad
--
Dolphins are so intelligent that within a few weeks they can
train Americans to stand at the edge of the pool and throw them
fish.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Solved : Re: Time to ask for help. Raid-5 Dual drive failure
2008-11-04 21:18 Time to ask for help. Raid-5 Dual drive failure Brad Campbell
@ 2008-11-05 8:50 ` Brad Campbell
0 siblings, 0 replies; 2+ messages in thread
From: Brad Campbell @ 2008-11-05 8:50 UTC (permalink / raw)
To: RAID Linux
Brad Campbell wrote:
> Ok, so it finally died.
>
> I was doing a large copy to an ext3 filesystem on md0 when one drive
> dropped out (SATA error). 3 minutes later a second drive dropped out
> (SATA error).
>
> I've tried to re-assemble the array with
> mdadm --assemble --force /dev/md0 but it errors out with
>
> mdadm: failed to RUN_ARRAY /dev/md0: Input/output error
>
So I re-read my archives on the linux-raid list, consulted google and decided I had enough
information available to be able to re-create the array.
I figured looking at the output from --examine on the first drive to die would give me a good
indicator on what the array *should* look like.
/dev/sdj1:
Magic : a92b4efc
Version : 00.90.00
UUID : 05cc3f43:de1ecfa4:83a51293:78015f1e
Creation Time : Sun May 2 18:02:14 2004
Raid Level : raid5
Used Dev Size : 244198400 (232.89 GiB 250.06 GB)
Array Size : 2197785600 (2095.97 GiB 2250.53 GB)
Raid Devices : 10
Total Devices : 10
Preferred Minor : 0
Update Time : Tue Nov 4 22:23:33 2008
State : active
Active Devices : 10
Working Devices : 10
Failed Devices : 0
Spare Devices : 0
Checksum : 210701c1 - correct
Events : 0.1338267
Layout : left-asymmetric
Chunk Size : 128K
Number Major Minor RaidDevice State
this 0 8 145 0 active sync /dev/sdj1
0 0 8 145 0 active sync /dev/sdj1
1 1 8 161 1 active sync /dev/sdk1
2 2 8 176 2 active sync /dev/sdl
3 3 8 193 3 active sync /dev/sdm1
4 4 8 225 4 active sync /dev/sdo1
5 5 8 209 5 active sync /dev/sdn1
6 6 8 113 6 active sync /dev/sdh1
7 7 8 129 7 active sync /dev/sdi1
8 8 8 81 8 active sync /dev/sdf1
9 9 8 96 9 active sync /dev/sdg
I supposed the most important thing was the order of the disks, so I tried this magic incantation..
mdadm --create /dev/md0 --assume-clean --level 5 --raid-devices=10 missing /dev/sdk1 /dev/sdl
/dev/sdm1 /dev/sdo1 /dev/sdn1 /dev/sdh1 /dev/sdi1 /dev/sdf1 /dev/sdg
That failed being completely unable to locate the superblock.
Then I wondered if perhaps it was defaulting to a different chunk size, (never thought to check with
--examine on one of the newly created components)
Second time I added --chunk 128 and e2fsck found a superblock however it was very mangled.
Third time I did an --examine on one of the newly created components and noticed that the new array
defaulted to left-symmetric, so I added --layout left-asymmetric and it all came back up.
mdadm --create /dev/md0 --assume-clean --level 5 --chunk 128 --layout left-asymmetric
--raid-devices=10 missing /dev/sdk1 /dev/sdl /dev/sdm1 /dev/sdo1 /dev/sdn1 /dev/sdh1 /dev/sdi1
/dev/sdf1 /dev/sdg
For those following along at home, double check everything!
Don't _ever_ try to see if it's right by mounting the array, use fsck -n which will do a read only
check of the filesystem and not try and write anything. A mount will try and replay the journal.
Regards,
Brad
--
Dolphins are so intelligent that within a few weeks they can
train Americans to stand at the edge of the pool and throw them
fish.
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2008-11-04 21:18 Time to ask for help. Raid-5 Dual drive failure Brad Campbell
2008-11-05 8:50 ` Solved : " Brad Campbell
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