Thread: MDADM RAID5 failing

[solved (sort of)] bad sata pci card, have new issue, repost new thread

not sure why, mdadm raid5 dropped 2 drives. rebuilding 1 of drives (sdg1), second drive (sde1) dropped too. second 1 dropped showing spare when mdadm --detail /dev/md0 have reassurance if readd "spare" won't try resync , cause me lose data.

here mdadm --detail
/dev/md0:
version : 0.90
creation time : sun aug 29 20:21:44 2010
raid level : raid5
used dev size : 1465135936 (1397.26 gib 1500.30 gb)
raid devices : 6
total devices : 5
preferred minor : 0
persistence : superblock persistent

update time : sun jun 26 08:06:35 2011
state : active, failed, not started
active devices : 4
working devices : 5
failed devices : 0
spare devices : 1

layout : left-symmetric
chunk size : 64k

uuid : 0d88f71a:0f8c6eb8:7506fbc4:05ba3487
events : 0.86276

number major minor raiddevice state
0 8 49 0 active sync /dev/sdd1
1 8 33 1 active sync /dev/sdc1
2 8 17 2 active sync /dev/sdb1
3 0 0 3 removed
4 0 0 4 removed
5 8 81 5 active sync /dev/sdf1

6 8 65 - spare /dev/sde1

edit:
getting /dev/sde's superblock doesn't match others. i'm tempted follow second step here http://ubuntuforums.org/showthread.php?t=410136 i'm not sure on safety, nor how repeat exact issue in vm try out without risking data.

here mdadm -e /dev/sdc1 (the others same except sde1 paste below)
/dev/sdc1:
magic : a92b4efc
version : 0.90.00
uuid : 0d88f71a:0f8c6eb8:7506fbc4:05ba3487
creation time : sun aug 29 20:21:44 2010
raid level : raid5
used dev size : 1465135936 (1397.26 gib 1500.30 gb)
array size : 7325679680 (6986.31 gib 7501.50 gb)
raid devices : 6
total devices : 6
preferred minor : 0

update time : sun jun 26 08:06:35 2011
state : clean
active devices : 5
working devices : 6
failed devices : 1
spare devices : 1
checksum : 32dbd749 - correct
events : 86276

layout : left-symmetric
chunk size : 64k

number major minor raiddevice state
1 8 33 1 active sync /dev/sdc1

0 0 8 81 0 active sync /dev/sdf1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 17 2 active sync /dev/sdb1
3 3 8 65 3 active sync /dev/sde1
4 4 0 0 4 faulty removed
5 5 8 49 5 active sync /dev/sdd1
6 6 8 97 6 spare /dev/sdg1

mdadm -e /dev/sde1
/dev/sde1:
magic : a92b4efc
version : 0.90.00
uuid : 0d88f71a:0f8c6eb8:7506fbc4:05ba3487
creation time : sun aug 29 20:21:44 2010
raid level : raid5
used dev size : 1465135936 (1397.26 gib 1500.30 gb)
array size : 7325679680 (6986.31 gib 7501.50 gb)
raid devices : 6
total devices : 6
preferred minor : 0

update time : sun jun 26 08:06:35 2011
state : clean
active devices : 5
working devices : 6
failed devices : 1
spare devices : 1
checksum : 32dbd78d - correct
events : 86276

layout : left-symmetric
chunk size : 64k

number major minor raiddevice state
6 8 97 6 spare /dev/sdg1

0 0 8 81 0 active sync /dev/sdf1
1 1 8 33 1 active sync /dev/sdc1
2 2 8 17 2 active sync /dev/sdb1
3 3 8 65 3 active sync /dev/sde1
4 4 0 0 4 faulty removed
5 5 8 49 5 active sync /dev/sdd1
6 6 8 97 6 spare /dev/sdg1

raid5 vulnerable rebuild failure large drives.

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [SOLVED] MDADM RAID5 failing

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