Re: help diagnosing bad disk

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We'll here's the rest of the info I should have sent in the last email:

root@recoil:/home/illsci# cat /proc/mdstat
Personalities : [multipath] [raid1]
md1 : active raid1 sdb2[1]
      974808064 blocks [2/1] [_U]

md0 : active raid1 sda1[0]
      1951744 blocks [2/1] [U_]

unused devices: <none>
root@recoil:/home/illsci# dmesg | grep sdb
sd 1:0:0:0: [sdb] 1953523055 512-byte hardware sectors (1000204 MB)
sd 1:0:0:0: [sdb] Write Protect is off
sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
sd 1:0:0:0: [sdb] 1953523055 512-byte hardware sectors (1000204 MB)
sd 1:0:0:0: [sdb] Write Protect is off
sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
 sdb: sdb1 sdb2
sd 1:0:0:0: [sdb] Attached SCSI disk
md: bind<sdb1>
md: kicking non-fresh sdb1 from array!
md: unbind<sdb1>
md: export_rdev(sdb1)
md: bind<sdb2>
root@recoil:/home/illsci# dmesg | grep sda
sd 0:0:0:0: [sda] 1953523055 512-byte hardware sectors (1000204 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
sd 0:0:0:0: [sda] 1953523055 512-byte hardware sectors (1000204 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
 sda: sda1 sda2
sd 0:0:0:0: [sda] Attached SCSI disk
md: bind<sda1>
md: bind<sda2>
md: kicking non-fresh sda2 from array!
md: unbind<sda2>
md: export_rdev(sda2)

root@recoil:/home/illsci# smartctl -a /dev/sda
smartctl version 5.36 [x86_64-unknown-linux-gnu] Copyright (C) 2002-6
Bruce Allen
Home page is http://smartmontools.sourceforge.net/

Device: ATA      Hitachi HDS72101 Version: GKAO
Serial number:       GTJ000PAG2HZUC
Device type: disk
Local Time is: Wed Dec 19 14:13:47 2007 EST
Device does not support SMART

Error Counter logging not supported

[GLTSD (Global Logging Target Save Disable) set. Enable Save with '-S on']
Device does not support Self Test logging
root@recoil:/home/illsci# smartctl -a /dev/sdb
smartctl version 5.36 [x86_64-unknown-linux-gnu] Copyright (C) 2002-6
Bruce Allen
Home page is http://smartmontools.sourceforge.net/

Device: ATA      Hitachi HDS72101 Version: GKAO
Serial number:       GTJ000PAG2K43C
Device type: disk
Local Time is: Wed Dec 19 14:13:49 2007 EST
Device does not support SMART

Error Counter logging not supported

[GLTSD (Global Logging Target Save Disable) set. Enable Save with '-S on']
Device does not support Self Test logging




On Dec 19, 2007 2:16 PM, Bill Davidsen <davidsen@xxxxxxx> wrote:
>
> Jon Sabo wrote:
> > So I was trying to copy over some Indiana Jones wav files and it
> > wasn't going my way.  I noticed that my software raid device showed:
> >
> > /dev/md1 on / type ext3 (rw,errors=remount-ro)
> >
> > Is this saying that it was remounted, read only because it found a
> > problem with the md1 meta device?  That's what it looks like it's
> > saying but I can still write to /.
> >
> > mdadm --detail showed:
> >
> > root@recoil:/home/illsci# mdadm --detail /dev/md0
> > /dev/md0:
> >         Version : 00.90.03
> >   Creation Time : Mon Jul 30 21:47:14 2007
> >      Raid Level : raid1
> >      Array Size : 1951744 ( 1906.32 MiB 1998.59 MB)
> >     Device Size : 1951744 (1906.32 MiB 1998.59 MB)
> >    Raid Devices : 2
> >   Total Devices : 1
> > Preferred Minor : 0
> >     Persistence : Superblock is persistent
> >
> >     Update Time : Wed Dec 19 12:59:56 2007
> >           State : clean, degraded
> >  Active Devices : 1
> > Working Devices : 1
> >  Failed Devices : 0
> >   Spare Devices : 0
> >
> >            UUID : 157f716c:0e7aebca:c20741f6
> > :bb6099c9
> >          Events : 0.28
> >
> >      Number   Major   Minor   RaidDevice State
> >        0       8        1        0      active sync   /dev/sda1
> >        1       0        0        1      removed
> >
> > root@recoil:/home/illsci# mdadm --detail /dev/md1
> >  /dev/md1:
> >         Version : 00.90.03
> >   Creation Time : Mon Jul 30 21:47:47 2007
> >      Raid Level : raid1
> >      Array Size : 974808064 (929.65 GiB 998.20 GB)
> >     Device Size : 974808064 (929.65 GiB 998.20 GB)
> >     Raid Devices : 2
> >   Total Devices : 1
> > Preferred Minor : 1
> >     Persistence : Superblock is persistent
> >
> >     Update Time : Wed Dec 19 13:14:53 2007
> >           State : clean, degraded
> >  Active Devices : 1
> > Working Devices : 1
> >  Failed Devices : 0
> >   Spare Devices : 0
> >
> >            UUID : 156a030e:9a6f8eb3:9b0c439e:d718e744
> >          Events : 0.1990
> >
> >     Number   Major   Minor   RaidDevice State
> >        0       8        2        0      active sync   /dev/sda2
> >        1       0        0        1      removed
> >
> >
> > I have two 1 terabyte sata drives in this box.  From what I was
> > reading wouldn't it show an F for the failed drive?  I thought I would
> > see that /dev/sdb1 and /dev/sdb2 were failed and it would show an F.
> > What is this saying and how do you know that its /dev/sdb and not some
> > other drive?  It shows removed and that the state is clean, degraded.
> > Is that something you can recover from with out returning this disk
> > and putting in a new one to add to the raid1 array?
> >
>
> You can try adding the partitions back to your array, but I suspect
> something bad has happened to your sdb drive, since it's failed out of
> both arrays. You can use dmesg to look for any additional information.
>
> Justin gave you the rest of the info you need to investigate, I'll not
> repeat it. ;-)
>
> --
> Bill Davidsen <davidsen@xxxxxxx>
>   "Woe unto the statesman who makes war without a reason that will still
>   be valid when the war is over..." Otto von Bismark
>
>
>
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