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Date:      Sun, 10 Nov 2002 14:26:31 +0300 (MSK)
From:      Dmitry Morozovsky <marck@rinet.ru>
To:        Eugene Grosbein <eugen@kuzbass.ru>
Cc:        Phil Kernick <Phil@Kernick.org>, <stable@FreeBSD.ORG>
Subject:   Re: backups of SUPERBLOCK
Message-ID:  <20021110142457.P8709-100000@woozle.rinet.ru>
In-Reply-To: <3DCDD873.F498DFC2@kuzbass.ru>

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On Sun, 10 Nov 2002, Eugene Grosbein wrote:

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

EG> disklabel ad0 shows, in partcular:
EG>
EG> 8 partitions:
EG> #        size   offset    fstype   [fsize bsize bps/cpg]
EG>   a:   102400   524288    4.2BSD        0     0     0   # (Cyl.   32*- 39*)
EG>   b:   524288        0      swap                        # (Cyl.    0 - 32*)
EG>   c: 12594897        0    unused        0     0         # (Cyl.    0 - 783*)
EG>   e:  3072000   626688    4.2BSD     1024  8192    22   # (Cyl.   39*- 230*)
EG>   f:  1024000  3698688    4.2BSD        0     0     0   # (Cyl.  230*- 293*)
EG>   g:  2048000  4722688    4.2BSD        0     0     0   # (Cyl.  293*- 421*)
EG>   h:  5824209  6770688    4.2BSD     1024  8192    22   # (Cyl.  421*- 783*)
EG>
EG> How do I know real parameters of 'f' and 'g' partitions
EG> and why zeroes are there?

Examine output of dumpfs(8). ncg, cpg and derived values can get you the clue
;-)

Sincerely,
D.Marck                                   [DM5020, DM268-RIPE, DM3-RIPN]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
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