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Date:      Sun, 10 Nov 2002 09:58:40 +0700
From:      Eugene Grosbein <eugen@kuzbass.ru>
To:        stable@freebsd.org
Subject:   backups of SUPERBLOCK
Message-ID:  <3DCDCB60.1D1A34C2@kuzbass.ru>

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Hi!

Recently I suffered from unstable power supply, after reboot
fsck said INCORRECT SUPER BLOCK, BAD MAGIC etc. etc.
I managed to revive filesystem using fsck -b 32 as I remember
that first copy of superblock is generally located at block 32.

I wonder, however, how can I know complete list of superblocks 
for all of my filesystems. One can write down the list 
when (if) uses newfs but it's hard if a drive is prepared during initial
installation and it's impossible if a drive was prepared using sysinstall
while in muliuser. 

Is there an official way to get list of superblock backups for existing
filesystem, other than backup/newfs/restore ?

Eugene Grosbein

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