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Date:      Sun, 1 Dec 2002 20:53:06 -0500 (EST)
From:      Mark Stosberg <mark@summersault.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: requesting help restoring disklabel on unbootable system
Message-ID:  <Pine.BSF.4.50.0212012051040.71967-100000@nollie.summersault.com>
In-Reply-To: <Pine.BSF.4.50.0212011153200.43501-100000@nollie.summersault.com>
References:  <Pine.BSF.4.50.0212011115120.43501-100000@nollie.summersault.com> <Pine.BSF.4.50.0212011153200.43501-100000@nollie.summersault.com>

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On Sun, 1 Dec 2002, Mark Stosberg wrote:

> On Sun, 1 Dec 2002, Mark Stosberg wrote:
> >
> > After an unfortunate sequence of events, my newly successfully upgraded FreeBSD 4.7
> > machine would not boot anymore and gave me a "boot:" prompt. Returning
> > to the install CD disklabel program, I saw that the only partition it
> > seemed be to finding was the swap partition.
> >
> > I recreated and wrote to disk what I thought was the old disk
> > partitioning scheme (being careful not to newfs anything). After that,
> > the system would boot off the drive, but would not mount /usr, /var or
> > /tmp due to complains of "bad super block: magic number wrong". I
> > suspect that I guessed my partition sizes wrong.
>
> I have a lead on solving this now. I found a tool called "find-sb"
> which finds superblocks, and seemed like it could be used to make a
> smarter guess about what my partition sizes should be. The trouble is,
> now I'm scratching my head about how to this tool installed in a useable
> state on the system since I can't boot fully in the first place.
>
> "find-sb":
> http://gatekeeper.dec.com/pub/BSD/FreeBSD/FreeBSD-current/src/tools/tools/find-sb/

I downloaded "find-sb" and the associated Makefile, but running "make"
failed with many errors on FreeBSD 4.7. I eventually addressed the issue
by installing 4.7 on a new disk and restoring from backup. I still have
the old disk at this point if any one has ideas how to make it
functional again.

  -mark

http://mark.stosberg.com/

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