From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arne Jansen <lists@die-jansens.de>
Subject: Re: mpt2sas: bug in disk ordering?
Date: Fri, 13 May 2011 12:51:25 +0200
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To: Caspar Smit <c.smit@truebit.nl>
Cc: linux-scsi@vger.kernel.org

On 13.05.2011 12:41, Caspar Smit wrote:
> That is something I really don't like.
> 
> After more checking I noticed the /dev/disk/by-path doesn't have any
> links for the disks and their slots anymore.

> 2011/5/13 Arne Jansen <lists@die-jansens.de>:
>> On 13.05.2011 12:34, Caspar Smit wrote:
>>> I tried with Debian Squeeze with the latest backports kernel 2.6.38,
>>> which has mpt2sas version 07.100.00.00
>>> and now the disks are ordered this way:
>>>
>>> /dev/sdb = slot 3
>>> /dev/sdc = slot 2
>>> /dev/sdd = slot 1
>>> /dev/sde = slot 0
>>> /dev/sdf = slot 7
>>> /dev/sdg = slot 6
>>> /dev/sdh = slot 5
>>> /dev/sdi = slot 4
>>
>> I see something similar here, and, what's worse, the order may very from
>> boot to boot.


It might also be a problem of the expander, in that it reports the disk
in this order. Are you using an expander?