I set up a small raid based Ubuntu 11.04 server machine and have just received this email from it. How can i verify or check this ?
Richard
This is an automatically generated mail message from mdadm running on godzilla
A Fail event had been detected on md device /dev/md/0.
It could be related to component device /dev/sda1.
Faithfully yours, etc.
P.S. The /proc/mdstat file currently contains the following:
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid5 sda10 sdb1[1] sdd1[3] sdc1[2] 2927135232 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [_UUU] [>....................] check = 2.2% (21655188/975711744) finish=4419.8min speed=3597K/sec
&> cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid5 sda10 sdb1[1] sdd1[3] sdc1[2] 2927135232 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [_UUU]
unused devices:
cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid5 sda1[0]F sdb1[1]sdd1[3] sdc1[2] 2927135232 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/3] [_UUU]
unused devices:
Dmsg [775549.274966] md/raid:md0: Disk failure on sda1, disabling device. [775549.274967] md/raid:md0: Operation continuing on 3 devices. [775549.280021] md/raid:md0: read error not correctable (sector 43310408 on sda1
). [775549.280028] md/raid:md0: read error not correctable (sector 43310416 on sda1
). [775549.280031] md/raid:md0: read error not correctable (sector 43310424 on sda1
). [775549.280035] md/raid:md0: read error not correctable (sector 43310432 on sda1
). [775549.280039] md/raid:md0: read error not correctable (sector 43310440 on sda1
). [775549.280043] md/raid:md0: read error not correctable (sector 43310448 on sda1
). [775549.280047] md/raid:md0: read error not correctable (sector 43310456 on sda1
). [775549.280051] md/raid:md0: read error not correctable (sector 43310464 on sda1
). [775549.280055] md/raid:md0: read error not correctable (sector 43310472 on sda1
). [775549.280226] ata7: EH complete [775549.316567] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x300000 action 0x6 [775549.319133] ata7.00: BMDMA stat 0x45 [775549.321658] ata7: SError: { Dispar BadCRC } [775549.324237] ata7.00: failed command: READ DMA EXT [775549.326754] ata7.00: cmd 25/00:f8:28:ed:94/00:03:02:00:00/e0 tag 0 dma 52019
2 in [775549.326757] res 51/84:48:78:7f:2e/84:00:03:00:00/e0 Emask 0x10 (ATA
bus error) [775549.331806] ata7.00: status: { DRDY ERR } [775549.334350] ata7.00: error: { ICRC ABRT } [775549.336890] ata7: hard resetting link [775549.336895] ata7: nv: skipping hardreset on occupied port [775549.340260] md: md0: data-check done. [775549.804062] ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [775549.844352] ata7.00: configured for UDMA/33 [775549.844390] ata7: EH complete [775549.936450] RAID conf printout: [775549.936456] --- level:5 rd:4 wd:3 [775549.936460] disk 0, o:0, dev:sda1 [775549.936463] disk 1, o:1, dev:sdb1 [775549.936465] disk 2, o:1, dev:sdc1 [775549.936507] disk 3, o:1, dev:sdd1 [775549.936557] RAID conf printout: [775549.936559] --- level:5 rd:4 wd:3 [775549.936562] disk 1, o:1, dev:sdb1 [775549.936564] disk 2, o:1, dev:sdc1 [775549.936567] disk 3, o:1, dev:sdd1
sudo mdadm --detail /dev/md0
/dev/md0: Version : 1.2 Creation Time : Sat Jan 1 14:43:44 2005 Raid Level : raid5 Array Size : 2927135232 (2791.53 GiB 2997.39 GB) Used Dev Size : 975711744 (930.51 GiB 999.13 GB) Raid Devices : 4 Total Devices : 4 Persistence : Superblock is persistent
Update Time : Sun Feb 5 19:17:41 2012 State : clean, degraded Active Devices : 3 Working Devices : 3 Failed Devices : 1 Spare Devices : 0 Layout : left-symmetric Chunk Size : 512K Name : godzilla:0 (local to host godzilla) UUID : 7c2be5e4:25e338e5:b575b8cd:83896caf Events : 657 Number Major Minor RaidDevice State 0 0 0 0 removed 1 8 17 1 active sync /dev/sdb1 2 8 33 2 active sync /dev/sdc1 3 8 49 3 active sync /dev/sdd1 0 8 1 - faulty spare /dev/sda1