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Date: Sat, 19 Oct 2013 12:51:57 -0700
From: Darren Pilgrim <list_freebsd@bluerosetech.com>
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To: Alexey Egorov <electreg@list.ru>, freebsd-hackers@freebsd.org
Subject: Re: determine drive's SAS port
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On 10/19/2013 7:15 AM, Alexey Egorov wrote:
> Hello all,
>
> I have a server with LSI HBA card, and when I remove drive I can see
> following messages in log:
>
> (da0:mps0:0:5:0): lost device - 0 outstanding, 2 refs
> (da0:mps0:0:5:0): removing device entry
>
> Is there a way to determine physical port (number "5" in
> "(da0:mps0:0:5:0)") when drive is inserted? (I need this to be able
> to create device symlinks based on physical port).

Many RAID cards can indicate a port by blinking the activity light.  If 
not, perhaps you can trace the cables and get a PCB diagram?  This is 
exactly why I write the WWN, serial and, for ZFS/graid, GPT label on a 
visible edge of the disk/sled.