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Date: Sun, 22 Jun 1997 17:17:14 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199706220717.RAA24402@godzilla.zeta.org.au>
To: freebsd-mobile@FreeBSD.ORG, tweten@ns.frihet.com
Subject: Re: NEC 6030X, FreeBSD 2.2.2, and the CDROM
Cc: freebsd-questions@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG
Sender: owner-stable@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

>the CD acts as /dev/wd0.  That gives me two choices.  I always leave the CD 
>drawer in -- and always boot from the CD, or I can boot the first time into 
>single user mode, change /etc/fstab to refer to /dev/wd0 instead of /dev/wd1 
>and never install the CD drawer again under FreeBSD.  Other strategies produce 
>a panic, immediately after the kernel gets through probing devices.  The cause 
>is inability to mount the root partition (because /etc/fstab points to the 
>"wrong" device).

The panic is before /etc/fstab is read.  I think the wd drive number doesn't
actually change, it just doesn't match the BIOS drive number.  Try booting
with 1:wd(0,a)kernel or 0:wd(1,a)kernel.

Bruce