Date: Wed, 3 Dec 2008 20:58:47 +0100 (CET) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: PJ <af.gourmet@videotron.ca> Cc: freebsd-questions@freebsd.org Subject: Re: restore superblock Message-ID: <20081203205836.I48129@wojtek.tensor.gdynia.pl> In-Reply-To: <4936C1CA.2040501@videotron.ca> References: <4936C1CA.2040501@videotron.ca>
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fsck_ffs -b
An alternate super block is usually
located at block 32 for UFS1, and block 160 for UFS2.
On Wed, 3 Dec 2008, PJ wrote:
> I have been googling for superblock restore and things are a bit confusing.
> Some of the commands don't seem to match current fsck parameters (notably -b
> doesn't exist.
> Apparently I should be able to reconstruct the superblock(s) on my /usr
> partition (slice ?) as my searches found that there are backups of the
> superblocks on the files systems.
> But how do I find them and restore the corrupt ones? Not clear in my
> searches.
> I have another installation of fbsd 7.0 on another machine with the
> partitioning identical and identical hdds.
> How could I use the superblock and/or other information from the good
> installation to repair the damaged one - or would it be possible to recover
> the superblock info from the damaged one's backcups?
> Phil Jourdan
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