From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk>
Subject: Re: dom0 - VFS: Cannot open root device
Date: Thu, 1 Dec 2005 17:42:47 +0100
Message-ID: <20051201164247.GA30448@snarc.org>
References: <2f11466b0512010717s2ac71b71h@mail.gmail.com>
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To: Marco Crociani - Tyrael <marco.crociani@gmail.com>
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On Thu, Dec 01, 2005 at 04:17:47PM +0100, Marco Crociani - Tyrael wrote:
> VFS: Cannot open root devise "sda3" or unknown-block(2,0)
> Please append a correct "root=" boot option
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(2,0)
> [snip]
> The motherboard is a Tyan Thunder K8SRE with 2 AMD Opteron Dual Core and
> SATA HD.

Hi,

did you have your SATA drive recognize ?
if no, please make sure you have enabled CONFIG_SCSI_SATA_NV in Dom0
(which seems to be the chipset of this motherboard)

if yes please provide your full dmesg.

Cheers,
-- 
Vincent Hanquez