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Date: Wed, 11 Apr 2007 09:04:15 -0700
From: "Josh Carroll" <josh.carroll@gmail.com>
To: "Ivan Voras" <ivoras@fer.hr>
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Cc: freebsd-questions@freebsd.org
Subject: Re: "No CD/DVD devices found" after booting from FreeBSD 6.2 CD 1
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> Because before it starts it relies on BIOS to provide services (in
> 16-bit x86 mode), but after the kernel starts, it must use its own
> drivers (32-bit or 64-bit, depending on your choice) and it seems it
> doesn't have the right drivers. Most CD/DVD drives are standard and
> register as ATA or SCSI drives but, as you see now, there are those that
> require special support.

It looks like the chipset on that particular Dell model is the NVIDIA
nForce 430. Others have had success with that chipset, and even a
similar Dell model according to this page:

http://www.freebsd.org/platforms/amd64/motherboards.html

You may want to try updating the BIOS. The entry for the Dell E521
mentions a BIOS update.

Josh