Date: Mon, 14 Jun 2004 22:40:07 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: Andreas Klemm <andreas@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: trouble with dump/restore on FreeBSD 5.2.1 (RELENG_5_2) Message-ID: <20040614204006.GI51677@cicely12.cicely.de> In-Reply-To: <20040614153005.GA42616@titan.klemm.apsfilter.org> References: <20040614153005.GA42616@titan.klemm.apsfilter.org>
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On Mon, Jun 14, 2004 at 05:30:05PM +0200, Andreas Klemm wrote: > Hi, > > dumped today all filesystems of my FreeBSD laptop, > which was a relatively new RELENG_5_2, because got new disk. > > Was unable to restore the filesystems using the official 5.2.1 DVD. > > Recovering > - / was possible with a warning > - /var was impossible > - The rest I didnt try... > > Made a level 0 dump of all filesystems using -L > since system complained when I made dump of a > filesystem in use without -L. > > /sbin/dump 0Lubf 128 - / | gzip > dump-_ > /sbin/dump 0Lubf 128 - /var | gzip > dump-_var > /sbin/dump 0Lubf 128 - /usr | gzip > dump-_usr > and so on ... > > For recovery > - I made a minimum installation of 5.2.1 > to get all dump images via ftp from server > - Then I used custom options to partition/newfs via > "W"rite option in the partition menue. > > The filesystems have been created and mounted > since I entered the mount points. > I didn't newfs /export of course... > > Now I entered fixit mode: > The filesytems > /mnt > /mnt/var > /mnt/usr > ... etc ... > Have been freshly created and were free. df shows correct size. > > Now I tried to restore using > > zcat /mnt/export/dump-_ | restore -r -f - > > Got error messages. > Guessed it might be related to dump blocksize, that restore > is unable to determine 128 automagically. > > Re-made / (umount/newfs) ... > Then: > zcat /mnt/export/dump-_ | restore -r -b 128 -f - > > This time I got / restored. > With warnings I don't remember exactly "expected xxx got xxx" gzip shuffels blocking. Use dd obs=64k between zcat and restore to do reblocking the stream. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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