I also sent this one to the linux-raid-ml, I am in trouble:
Am 24.02.2010 15:54, schrieb Stefan G. Weichinger: > What to try? > > This is a crucial server and I feel a lot of pressure. > Rebuilding that raid would mean a lot of restore-work etc. > So I would really appreciate a goo advice here. Followup: --examine shows different statii for the four partitions: server-gentoo ~ # mdadm --examine /dev/sda4 /dev/sda4: Magic : a92b4efc Version : 00.90.00 UUID : d4b0e9c1:067357ce:2569337e:e9af8bed Creation Time : Tue Aug 5 14:14:16 2008 Raid Level : raid5 Used Dev Size : 145910272 (139.15 GiB 149.41 GB) Array Size : 291820544 (278.30 GiB 298.82 GB) Raid Devices : 3 Total Devices : 4 Preferred Minor : 4 Update Time : Wed Feb 24 15:33:37 2010 State : active Active Devices : 2 Working Devices : 3 Failed Devices : 1 Spare Devices : 1 Checksum : 3039381e - correct Events : 0.13 Layout : left-symmetric Chunk Size : 64K Number Major Minor RaidDevice State this 0 8 4 0 active sync /dev/sda4 0 0 8 4 0 active sync /dev/sda4 1 1 8 20 1 active sync /dev/sdb4 2 2 0 0 2 faulty removed 3 3 8 52 3 spare /dev/sdd4 server-gentoo ~ # mdadm --examine /dev/sdb4 /dev/sdb4: Magic : a92b4efc Version : 00.90.00 UUID : d4b0e9c1:067357ce:2569337e:e9af8bed Creation Time : Tue Aug 5 14:14:16 2008 Raid Level : raid5 Used Dev Size : 145910272 (139.15 GiB 149.41 GB) Array Size : 291820544 (278.30 GiB 298.82 GB) Raid Devices : 3 Total Devices : 4 Preferred Minor : 4 Update Time : Wed Feb 24 15:37:05 2010 State : clean Active Devices : 1 Working Devices : 2 Failed Devices : 1 Spare Devices : 1 Checksum : 3039393f - correct Events : 0.32 Layout : left-symmetric Chunk Size : 64K Number Major Minor RaidDevice State this 1 8 20 1 active sync /dev/sdb4 0 0 0 0 0 removed 1 1 8 20 1 active sync /dev/sdb4 2 2 0 0 2 faulty removed 3 3 8 52 3 spare /dev/sdd4 server-gentoo ~ # mdadm --examine /dev/sdc4 /dev/sdc4: Magic : a92b4efc Version : 00.90.00 UUID : d4b0e9c1:067357ce:2569337e:e9af8bed Creation Time : Tue Aug 5 14:14:16 2008 Raid Level : raid5 Used Dev Size : 145910272 (139.15 GiB 149.41 GB) Array Size : 291820544 (278.30 GiB 298.82 GB) Raid Devices : 3 Total Devices : 4 Preferred Minor : 4 Update Time : Wed Feb 24 15:33:28 2010 State : clean Active Devices : 3 Working Devices : 4 Failed Devices : 0 Spare Devices : 1 Checksum : 30393836 - correct Events : 0.10 Layout : left-symmetric Chunk Size : 64K Number Major Minor RaidDevice State this 2 8 36 2 active sync /dev/sdc4 0 0 8 4 0 active sync /dev/sda4 1 1 8 20 1 active sync /dev/sdb4 2 2 8 36 2 active sync /dev/sdc4 3 3 8 52 3 spare /dev/sdd4 server-gentoo ~ # mdadm --examine /dev/sdd4 /dev/sdd4: Magic : a92b4efc Version : 00.90.00 UUID : d4b0e9c1:067357ce:2569337e:e9af8bed Creation Time : Tue Aug 5 14:14:16 2008 Raid Level : raid5 Used Dev Size : 145910272 (139.15 GiB 149.41 GB) Array Size : 291820544 (278.30 GiB 298.82 GB) Raid Devices : 3 Total Devices : 4 Preferred Minor : 4 Update Time : Wed Feb 24 15:37:05 2010 State : clean Active Devices : 1 Working Devices : 2 Failed Devices : 1 Spare Devices : 1 Checksum : 3039395d - correct Events : 0.32 Layout : left-symmetric Chunk Size : 64K Number Major Minor RaidDevice State this 3 8 52 3 spare /dev/sdd4 0 0 0 0 0 removed 1 1 8 20 1 active sync /dev/sdb4 2 2 0 0 2 faulty removed 3 3 8 52 3 spare /dev/sdd4 ---- Does this info help? Thanks, Stefan