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Date: Wed, 27 Feb 2008 23:56:47 -0800
From: Jeremy Chadwick <koitsu@freebsd.org>
To: Doug Hardie <bc979@lafn.org>
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Cc: FreeBSD Stable <freebsd-stable@freebsd.org>
Subject: Re: FreeBSD 7.0 Questions
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On Wed, Feb 27, 2008 at 11:15:30PM -0800, Doug Hardie wrote:
> I have just installed 7.0 on some new hardware.  Have never tried earlier 
> versions.  There are a couple of unexpected items that I do not understand.
>
> 2.  I have 2 SATA drives in the system.  The first is recognized as ad10 
> and the second as ad12.  I expected to see ad0 and ad1.

You shouldn't "expect" this in any way shape or form.  The device
numbers are not consistent, and are known to change depending upon lots
of reasons (AHCI disabled/enabled, another ATA controller in place, SATA
in "compatible" mode or "enhanced" mode, etc. etc.).

Thus, never expect the adX devices to "start with 0".

-- 
| Jeremy Chadwick                                    jdc at parodius.com |
| Parodius Networking                           http://www.parodius.com/ |
| UNIX Systems Administrator                      Mountain View, CA, USA |
| Making life hard for others since 1977.                  PGP: 4BD6C0CB |