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Date: Thu, 14 Feb 2008 10:04:34 +0100 (CET)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Joe Demeny <jd1987@borozo.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Trying to recover data from FreeBSD 4.11 system
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>
> So, I installed this drive as the second hard drive in a FreeBSD 6.2 system
> and I tried to mount it, but I got "incorrect super block".
>
> Looks like I have /dev/ad1, /dev/ad1s1, /dev/ad1s1c, and /dev/ad1s1e.

no ad1s1a?

>
> Is there a way to mount these filesystems?

possibly try fsck - i don't know (my first FreeBSD was 5.*) but maybe UFS 
changed a bit?