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Date: Tue, 11 May 2010 21:46:35 +0200
From: Leslie Jensen <leslie@eskk.nu>
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Subject: Disk can't be found, boot stops at mountroot
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System 7.2-RELEASE

I made the first reboot after

freebsd-update -r 8.0-RELEASE

freebsd-update install

and I'm now stuck at the mountroot> prompt that says trying to mount 
from ufs:/dev/ad0s1a

ROOT MOUNT ERROR

The command ? to list valid boot devices gives
List of GEOM managed disk devices:
cd0 ufsid/452b81499eec5ac8 ad0a acd0 ad0 fd0

I've tried

ufs:/dev/da0s1a

and

ufs:/dev/ad0s1a

With no luck

Any suggestions on how to get booted?

Thanks