Hi guys.
I've been having trouble with a four-disk raid5 array, which I now believe were caused by a flaky eSATA cable. The cable has been replaced, and the controller now seems to reliably see all four disks.
In fact I have five disks, and so a partition on the fifth disk acts as a spare. Over the past several days I've been connecting and disconnecting drives in ways that I didn't realise were unreliable (due to the faulty cable).
This has resulted in the md metadata being out of sync on the different partitions. Please could someone provide advice as to how to recover this array (which contains an ext3 filesystem)?
Many thanks!
Jan
/dev/sda2:
Magic : a92b4efc
Version : 00.90.00
UUID : 714e46f1:479268a7:895e209c:936fa570
Creation Time : Fri Jun 22 20:56:51 2007
Raid Level : raid5
Used Dev Size : 311588608 (297.15 GiB 319.07 GB)
Array Size : 934765824 (891.46 GiB 957.20 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 2
Update Time : Wed Jul 14 13:19:56 2010
State : active
Active Devices : 3
Working Devices : 4
Failed Devices : 1
Spare Devices : 1
Checksum : 242755b4 - correct
Events : 24565
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 2 1 active sync /dev/sda2
0 0 8 66 0 active sync /dev/sde2
1 1 8 2 1 active sync /dev/sda2
2 2 8 18 2 active sync /dev/sdb2
3 3 0 0 3 faulty removed
4 4 8 34 4 spare /dev/sdc2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
UUID : 714e46f1:479268a7:895e209c:936fa570
Creation Time : Fri Jun 22 20:56:51 2007
Raid Level : raid5
Used Dev Size : 311588608 (297.15 GiB 319.07 GB)
Array Size : 934765824 (891.46 GiB 957.20 GB)
Raid Devices : 4
Total Devices : 5
Preferred Minor : 2
Update Time : Tue Jul 13 03:47:51 2010
State : active
Active Devices : 4
Working Devices : 5
Failed Devices : 0
Spare Devices : 1
Checksum : 2425708a - correct
Events : 21017
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
4 4 8 82 4 spare /dev/sdf2
/dev/sdc2:
Magic : a92b4efc
Version : 00.90.00
UUID : 714e46f1:479268a7:895e209c:936fa570
Creation Time : Fri Jun 22 20:56:51 2007
Raid Level : raid5
Used Dev Size : 311588608 (297.15 GiB 319.07 GB)
Array Size : 934765824 (891.46 GiB 957.20 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 2
Update Time : Wed Jul 14 13:20:13 2010
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 2
Spare Devices : 1
Checksum : 2427b5fa - correct
Events : 24574
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 4 8 34 4 spare /dev/sdc2
0 0 8 66 0 active sync /dev/sde2
1 1 0 0 1 faulty removed
2 2 8 18 2 active sync /dev/sdb2
3 3 0 0 3 faulty removed
4 4 8 34 4 spare /dev/sdc2
/dev/sdd2:
Magic : a92b4efc
Version : 00.90.00
UUID : 714e46f1:479268a7:895e209c:936fa570
Creation Time : Fri Jun 22 20:56:51 2007
Raid Level : raid5
Used Dev Size : 311588608 (297.15 GiB 319.07 GB)
Array Size : 934765824 (891.46 GiB 957.20 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 2
Update Time : Wed Jul 14 13:20:13 2010
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 2
Spare Devices : 1
Checksum : 2427b5ec - correct
Events : 24574
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 18 2 active sync /dev/sdb2
0 0 8 66 0 active sync /dev/sde2
1 1 0 0 1 faulty removed
2 2 8 18 2 active sync /dev/sdb2
3 3 0 0 3 faulty removed
4 4 8 34 4 spare /dev/sdc2
/dev/sde2:
Magic : a92b4efc
Version : 00.90.00
UUID : 714e46f1:479268a7:895e209c:936fa570
Creation Time : Fri Jun 22 20:56:51 2007
Raid Level : raid5
Used Dev Size : 311588608 (297.15 GiB 319.07 GB)
Array Size : 934765824 (891.46 GiB 957.20 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 2
Update Time : Wed Jul 14 13:20:13 2010
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 2
Spare Devices : 1
Checksum : 2427b618 - correct
Events : 24574
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 8 66 0 active sync /dev/sde2
0 0 8 66 0 active sync /dev/sde2
1 1 0 0 1 faulty removed
2 2 8 18 2 active sync /dev/sdb2
3 3 0 0 3 faulty removed
4 4 8 34 4 spare /dev/sdc2
