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Date: Wed, 2 Apr 2008 12:05:40 -0400
From: David Schultz <das@FreeBSD.ORG>
To: Barney Cordoba <barney_cordoba@yahoo.com>
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Cc: current@FreeBSD.ORG
Subject: Re: Freebsd 7.0 DVD/CD-ROM lockups on ICH9R
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On Tue, Apr 01, 2008, Barney Cordoba wrote:
> When trying to mount a CDROM on the DVDROM the system
> just locks up. No messages at all.

This is during boot? Try a verbose boot, for one.  Also try
waiting a few minutes; I have a system where it takes 8 minutes to
probe the drive at boot, due to timeouts and a lengthy series of
retries.