SCSI messages - should I be worried?

[Dave Ewart]

On Wednesday, 29.07.2009 at 08:37 -0500, Patrick_Boyd at Dell.com wrote:

> Sense Key / Code / Qualifier / Reason
> 6 / 29 / 02       SCSI BUS RESET OCCURRED - Perfectly normal occurance.
> The bus gets reset if a device returns an unexpected answer or there are
> arbitration problems, nothing to worry about. It happens.
> 6 / 29 / CD		This one is vendor specific, but 6 / 29 means
> device reset as well. This probably indicates that the card tried
> talking to the device before it finished it's reset. Again nothing to
> worry about.
> 2 / 04 / 01		Logical unit in process of becoming ready - This
> can happen during power on or after a reset. Again expected, nothing
> wrong with the disk.

Thanks for the reply, Patrick: much appreciated.

> I don't see anything that would bother me here. If you start seeing
> Sense key's of 1, 3, or 4 then you may have problems, but the RAID card
> should flag the disk as bad long before that happens.

Understood.

> Sense codes happen in the SCSI realm all the time and 90% of the time
> are nothing to worry about.

My concern is really the fact that we've been running this PowerVault
for six months without *any* SCSI sense messages being logged at all -
even if they are considered normal - then suddenly two days' ago we
started getting them by the bucket load.

This is the real issue, I guess.  Does the fact that this behaviour has
suddenly begun - and always relating to the same physical disk - not
suggest that there may be something wrong here?  Either with the disk,
or with the enclosure slot relating to it?

Dave.

-- 
Dave Ewart
davee at ceu.ox.ac.uk
Computing Manager, Cancer Epidemiology Unit
University of Oxford / Cancer Research UK
PGP: CC70 1883 BD92 E665 B840 118B 6E94 2CFD 694D E370
Get key from http://www.ceu.ox.ac.uk/~davee/davee-ceu-ox-ac-uk.asc
N 51.7516, W 1.2152
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
Url : http://lists.us.dell.com/pipermail/linux-poweredge/attachments/20090729/2e1af258/attachment-0001.sig