possible hardware problem on PE 2650

[Jens Dueholm Christensen]

Most likely virtual media of some sort - or some left over space on the same physical disks as /dev/sda.

Basicly, if you don't know what /deb/sdb is don't worry about it.. :)

Regards,
Jens Dueholm Christensen 
Business Process and Improvement, Rambøll Survey IT
-----Original Message-----
From: linux-poweredge-bounces at dell.com [mailto:linux-poweredge-bounces at dell.com] On Behalf Of P.A
Sent: 19. maj 2009 19:04
To: 'Tom Brown'
Cc: linux-poweredge at dell.com
Subject: RE: possible hardware problem on PE 2650

Basically what the log says.


Unable to read /dev/sdb

Yeah I have no idea what sdb could be. It doesn't show up on mount, no
errors in OMSA.

-----Original Message-----
From: Tom Brown [mailto:tom at ng23.net] 
Sent: Tuesday, May 19, 2009 12:55 PM
To: P.A
Cc: linux-poweredge at dell.com
Subject: Re: possible hardware problem on PE 2650

P.A wrote:
>
> 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.
>

fdisk /dev/sdb

what does that say?

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