Hi,
i hope somebody on this ML can help me.
My RAID5 died last night during a rebuild when two drives failed (looks
like a sata_mv problem). The RAID5 was rebuilding because one of the two
drives failed before and after running badblocks for 2 days, i re-added
it to the RAID.
The used drives are from /dev/sdb1 to /dev/sdj1 (9 Drives, RAID5), the
failed drives are sdj1 and sdg1
The current situation is that I cannot start the RAID. I wanted to try
readding on of the the drives, so removed it beforehand, making it a
spare :\ The layout is as follows:
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 0 0 1 removed
2 8 113 2 active sync /dev/sdh1
3 8 49 3 active sync /dev/sdd1
4 8 129 4 active sync /dev/sdi1
5 0 0 5 removed
6 8 17 6 active sync /dev/sdb1
7 8 81 7 active sync /dev/sdf1
8 8 65 8 active sync /dev/sde1
Re-adding fails with a simple message:
# mdadm -v /dev/md0 --re-add /dev/sdg1
mdadm: --re-add for /dev/sdg1 to /dev/md0 is not possible
I tried re-adding both failed drives at the same, with the same result.
When examining the drives, sdj1 has the information from before the crash:
Device Role : Active device 5
Array State : AAAAAAAAA ('A' == active, '.' == missing)
sdg1 looks like this
Device Role : spare
Array State : A.AAA.AAA ('A' == active, '.' == missing)
The other look like
Device Role : Active device 6
Array State : A.AAA.AAA ('A' == active, '.' == missing)
So looks that my repair tries made sdg1 a spare :\ I attached the full
output to this mail.
Is there anyway to restart the RAID from the information contained in
drive sdj1? Perhaps via Incremental Build starting from one drive? Could
that work? If the RAID wouldn't have been rebuilding before the crash, i
would just recreate it with --assume-clean.
Thanks in advance for any help
Regards
Christoph Nelles
--
Christoph Nelles
E-Mail : evilazrael@xxxxxxxxxxxxx
Jabber : eazrael@xxxxxxxxxxxxxx ICQ : 78819723
PGP-Key : ID 0x424FB55B on subkeys.pgp.net
or http://evilazrael.net/pgp.txt
# mdadm --examine /dev/sdg1
/dev/sdg1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6b21b3ed:d39d5a54:d4939113:77851cb6
Name : router:0 (local to host router)
Creation Time : Fri Apr 27 20:25:04 2012
Raid Level : raid5
Raid Devices : 9
Avail Dev Size : 5860529039 (2794.52 GiB 3000.59 GB)
Array Size : 46884229120 (22356.14 GiB 24004.73 GB)
Used Dev Size : 5860528640 (2794.52 GiB 3000.59 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : a1b16284:321fcdd0:93993ff5:832eee3a
Update Time : Thu Jan 31 00:50:44 2013
Checksum : 2391e873 - correct
Events : 27697
Layout : left-symmetric
Chunk Size : 64K
Device Role : spare
Array State : A.AAA.AAA ('A' == active, '.' == missing)
mdadm --examine /dev/sdj1
/dev/sdj1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6b21b3ed:d39d5a54:d4939113:77851cb6
Name : router:0 (local to host router)
Creation Time : Fri Apr 27 20:25:04 2012
Raid Level : raid5
Raid Devices : 9
Avail Dev Size : 5860529039 (2794.52 GiB 3000.59 GB)
Array Size : 46884229120 (22356.14 GiB 24004.73 GB)
Used Dev Size : 5860528640 (2794.52 GiB 3000.59 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 7023df83:d890ce04:fc28652e:094adffe
Update Time : Thu Jan 31 00:24:56 2013
Checksum : 542f70be - correct
Events : 27691
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 5
Array State : AAAAAAAAA ('A' == active, '.' == missing)
mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Fri Apr 27 20:25:04 2012
Raid Level : raid5
Used Dev Size : -1
Raid Devices : 9
Total Devices : 7
Persistence : Superblock is persistent
Update Time : Thu Jan 31 10:36:28 2013
State : active, FAILED, Not Started
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : router:0 (local to host router)
UUID : 6b21b3ed:d39d5a54:d4939113:77851cb6
Events : 27699
Number Major Minor RaidDevice State
0 8 33 0 active sync /dev/sdc1
1 0 0 1 removed
2 8 113 2 active sync /dev/sdh1
3 8 49 3 active sync /dev/sdd1
4 8 129 4 active sync /dev/sdi1
5 0 0 5 removed
6 8 17 6 active sync /dev/sdb1
7 8 81 7 active sync /dev/sdf1
8 8 65 8 active sync /dev/sde1/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 6b21b3ed:d39d5a54:d4939113:77851cb6
Name : router:0 (local to host router)
Creation Time : Fri Apr 27 20:25:04 2012
Raid Level : raid5
Raid Devices : 9
Avail Dev Size : 5860529039 (2794.52 GiB 3000.59 GB)
Array Size : 46884229120 (22356.14 GiB 24004.73 GB)
Used Dev Size : 5860528640 (2794.52 GiB 3000.59 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : active
Device UUID : 29c62776:e9c58ce6:1c6e9ab1:046ac411
Update Time : Thu Jan 31 10:36:28 2013
Checksum : be473d02 - correct
Events : 27699
Layout : left-symmetric
Chunk Size : 64K
Device Role : Active device 6
Array State : A.AAA.AAA ('A' == active, '.' == missing)
