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Date: Tue, 20 Feb 2007 19:22:24 +0000
From: Tom Judge <tom@tomjudge.com>
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To: Dan D Niles <dan@more.net>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Root devices changing on Dell 2950 with dual perc 5
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Dan D Niles wrote:
> I just installed FreeBSD 6.2 on a Dell 2950.  I installed it on a raid 1
> on the integrated Perc 5i.  The root device was /dev/mfid0s2a.
> 
> Then, I configured a raid 5 device on the Perc 5e.  Now, my root device
> was /dev/mfid1s2a.   As a test, I configured an additional raid 1 device
> on the Perc 5e.  Now my root device is /dev/mfid2s2a.
> 
> How do I get the internal raid device to be /dev/mfid0 and not change
> every time I add an external raid device?
> 
> The machine BIOS lists the Perc 5i first, and the Perc BIOS lists the
> Perc 5i as controller 0 and the Perc 5e as controller 1.
> 
> Any ideas how to fix this?
> 
> Thanks,
> 
> Dan
> 

Not a true fix but you could take a look at geom label.  It will allow 
you to label each partition with a static device id.

Tom