[CentOS] unable to read partition table in log
Scott Silva
ssilva at sgvwater.com
Mon May 18 21:34:09 UTC 2009
on 5-18-2009 1:04 PM P.A spake the following:
> Hi recently I noticed in the messages log, the following error
>
>
>
> May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
>
> May 18 15:59:52 mail kernel: sdb : READ CAPACITY failed.
>
> May 18 15:59:52 mail kernel: sdb : status=0, message=00, host=1, driver=00
>
> May 18 15:59:52 mail kernel: sdb : sense not available.
>
> May 18 15:59:52 mail kernel: sdb: assuming Write Enabled
>
> May 18 15:59:52 mail kernel: sdb: assuming drive cache: write through
>
> May 18 15:59:52 mail kernel: sdb:<3>Buffer I/O error on device sdb,
> logical block 0
>
> May 18 15:59:52 mail kernel: Buffer I/O error on device sdb, logical block 0
>
> May 18 15:59:52 mail last message repeated 5 times
>
> May 18 15:59:52 mail kernel: unable to read partition table
>
>
>
> I’m not sure what sdb is since its not listed on my partition table
>
>
>
> [root at mail srvadmin]# fdisk -l
>
>
>
> Disk /dev/sda: 109.1 GB, 109196476416 bytes
>
> 255 heads, 63 sectors/track, 13275 cylinders
>
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
>
>
> Device Boot Start End Blocks Id System
>
> /dev/sda1 * 1 13 104391 83 Linux
>
> /dev/sda2 14 13275 106527015 8e Linux LVM
>
>
>
> [root at mail srvadmin]# df -h
>
> Filesystem Size Used Avail Use% Mounted on
>
> /dev/mapper/VolGroup00-LogVol00
>
> 99G 42G 52G 45% /
>
> /dev/sda1 99M 44M 51M 47% /boot
>
> none 3.9G 0 3.9G 0% /dev/shm
>
> [root at mail srvadmin]#
>
>
>
> I looked at the hardware itself and all disk in this raid system are
> fine, my question is, is this something I need to worry about and what
> is causing this issue.
>
> Although everything looking fine, my messages log is full of sdb complaints.
>
Does the system have memory card slots or a sd or cf reader? Some of those get
detected as a scsi drive, but fail like this.
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