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Date:      Sun, 4 May 2003 10:22:04 +0930
From:      Greg 'groggy' Lehey <grog@FreeBSD.org>
To:        Paul English <penglish@hydro.washington.edu>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Incorrect super block on a disk
Message-ID:  <20030504005204.GK84427@wantadilla.lemis.com>
In-Reply-To: <20030503164838.X10254-100000@dynamic.hydro.washington.edu>
References:  <20030503164838.X10254-100000@dynamic.hydro.washington.edu>

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On Saturday,  3 May 2003 at 16:57:57 -0700, Paul English wrote:
>
> Hi,
> 	I have a disk that I sent out for data recovery. The recovery
> place returned my data on another hard drive. I'm trying to mount the
> relevant partition of said hard drive. When I do I get:
>
> mount: /dev/ad1s2e on /mnt: incorrect super block
>
> When I try to fsck, I get:
>
> INCORRECT SUPER BLOCK: MAGIC NUMBER WRONG
>
> it tries for an alternate superblock, fails and then I try doing
> fsck -b 32 (as recommended in the manpages) and I get the same error.
>
> Is there anything I'm doing wrong or something else to try?

It seems pretty certain that whatever they sent back from the data
recovery house is not a UFS file system.  You should try to find out
how they got the data there.  I can't imagine them creating a new file
system.  Until you know that, there's not much point trying
alternatives, though some of them exist.

> Can I somehow regenerate the super block?

Regenerating super blocks is simple: that's what newfs(8) does.  The
trick is keeping your data.

Greg
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