Date: Sat, 24 Jul 2004 05:55:10 -0700 From: Tim Kientzle <kientzle@freebsd.org> To: Charles Sprickman <spork@fasttrackmonkey.com> Cc: freebsd-hackers@freebsd.org Subject: Re: disk recovery help Message-ID: <41025C2E.8070904@freebsd.org> In-Reply-To: <20040720140124.E28049@toad.nat.fasttrackmonkey.com> References: <20040719191408.V28049@toad.nat.fasttrackmonkey.com> <40FD011B.1020504@trio.plala.or.jp> <20040720140124.E28049@toad.nat.fasttrackmonkey.com>
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Charles Sprickman wrote:
>
> ... there seem to be a ton of superblock backups.
> How do I find out where they are and compare them?
This is an FAQ, and probably in the handbook somewhere
(google for "alternate superblock"):
* According to "man fsck_ffs", block 32 is usually
an alternate superblock.
* You can also use newfs -N to find out where
the superblocks are probably located and
fsck_ffs -b to recheck the drive using
one of the alternates instead of the trashed
primary.
* 40G IDE drives are cheap and plenty big enough
to give you a sandbox for trying to recover
your 26G filesystem image.
Someone else mentioned "fsdb." I've never used
it myself, but it looks like it might be useful to you.
Tim
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