From owner-freebsd-questions@FreeBSD.ORG  Wed Jul 26 16:59:10 2006
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From: John Murphy <sub02@freeode.co.uk>
To: "adrian esquivel" <adrianesquisi@gmail.com>
Date: Wed, 26 Jul 2006 17:59:03 +0100
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Cc: freebsd-questions@freebsd.org
Subject: Re: help installing FreeBSD
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"adrian esquivel" <adrianesquisi@gmail.com> wrote:

>Hi! I've been trying to install FBSD on my computer, but I keep getting an
>error message that I have absolutely no idea what it means. This is what I
>get when I hit Alt+F2
>
>DEBUG: Scanning disk ad0 for root filesystem
>DEBUG: Scanning disk ad0 for swap partitions
>ad0: WARNING - WRITE_DMA UDMA ICRC error(retrying request) LBA=63
>ad0: WARNING - WRITE_DMA UDMA ICRC error(retrying request) LBA=63
>ad0: FAILURE - WRITE_DMA status=51<READY,DSC,ERROR> error=84<ICRC,ABORTED>
>LBA=63
>ad0: WARNING - WRITE_DMA UDMA ICRC error(retrying request) LBA=63
>ad0: WARNING - WRITE_DMA UDMA ICRC error(retrying request) LBA=63
>ad0: FAILURE - WRITE_DMA status=51<READY,DSC,ERROR> error=84<ICRC,ABORTED>
>LBA=67
[snip]

I had similar errors reported when I tried to install FreeBSD from a
CDRom drive which was connected to the motherboard with a standard
udma(33?) ribbon cable (Yes write errors).  Make sure your connectors
are the better 80 conductor ones.

-- 
John.