Messages in this thread | | | Subject | first one disk drops our of raid, then the other - I/O error on same sector. raid bug? | From | Brad Langhorst <> | Date | Fri, 01 Jun 2007 20:43:08 -0400 |
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This is a debian stable system in production. Kernel 2.6.18. I upgraded the kernel from 2.6.8 to 2.6.18 about 2 weeks ago and saw no problems until today.
May 30 12:58:00 bitc kernel: (scsi0:A:1:0): Unexpected busfree in Command phase May 30 12:58:00 bitc kernel: SEQADDR == 0x16c May 30 12:58:00 bitc kernel: sd 0:0:1:0: SCSI error: return code = 0x00010000 May 30 12:58:00 bitc kernel: end_request: I/O error, dev sdb, sector 287322317 May 30 12:58:00 bitc kernel: raid1: Disk failure on sdb2, disabling device. May 30 12:58:00 bitc kernel: ^IOperation continuing on 1 devices May 30 12:58:01 bitc kernel: sd 0:0:1:0: SCSI error: return code = 0x00010000 May 30 12:58:01 bitc kernel: end_request: I/O error, dev sdb, sector 284758725 May 30 12:58:01 bitc kernel: RAID1 conf printout: May 30 12:58:01 bitc kernel: --- wd:1 rd:2 May 30 12:58:01 bitc kernel: disk 0, wo:0, o:1, dev:sda2 May 30 12:58:01 bitc kernel: disk 1, wo:1, o:0, dev:sdb2 May 30 12:58:01 bitc kernel: RAID1 conf printout: May 30 12:58:01 bitc kernel: --- wd:1 rd:2 May 30 12:58:01 bitc kernel: disk 0, wo:0, o:1, dev:sda2
I can add /dev/sdb back
May 30 17:14:17 bitc kernel: md: md1: sync done. May 30 17:14:17 bitc kernel: RAID1 conf printout: May 30 17:14:17 bitc kernel: --- wd:2 rd:2 May 30 17:14:17 bitc kernel: disk 0, wo:0, o:1, dev:sda2 May 30 17:14:17 bitc kernel: disk 1, wo:0, o:1, dev:sdb2
thenk /dev/sda fell out!
May 31 02:37:06 bitc kernel: (scsi0:A:0:0): Unexpected busfree in Command phase May 31 02:37:06 bitc kernel: SEQADDR == 0x16c May 31 02:37:06 bitc kernel: sd 0:0:0:0: SCSI error: return code = 0x00010000 May 31 02:37:06 bitc kernel: end_request: I/O error, dev sda, sector 287322317 May 31 02:37:06 bitc kernel: raid1: Disk failure on sda2, disabling device. May 31 02:37:06 bitc kernel: ^IOperation continuing on 1 devices May 31 02:37:06 bitc kernel: sd 0:0:0:0: SCSI error: return code = 0x00010000 May 31 02:37:06 bitc kernel: end_request: I/O error, dev sda, sector 276325445 May 31 02:37:06 bitc kernel: RAID1 conf printout: May 31 02:37:06 bitc kernel: --- wd:1 rd:2 May 31 02:37:06 bitc kernel: disk 0, wo:1, o:0, dev:sda2 May 31 02:37:06 bitc kernel: disk 1, wo:0, o:1, dev:sdb2 May 31 02:37:06 bitc kernel: RAID1 conf printout: May 31 02:37:06 bitc kernel: --- wd:1 rd:2 May 31 02:37:06 bitc kernel: disk 1, wo:0, o:1, dev:sdb2
Note that the first error is at the same sector for both disks 287322317(sda) = 287322317(sdb) but the second one is at a different spot 276325445(sda) != 284758725(sbd)
it seems unlikely that both disks have exactly the same bad sector
Maybe a disk is failing, but smart doesn't show a big difference in ECC errors between the two disks. Seems wrong that the kernel raid should first drop one disk, then the other if one disk is really failing.
Is this a bug?
Brad
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