Date: Sun, 23 Oct 2011 21:08:14 +0200 From: Polytropon <freebsd@edvax.de> To: Bill Tillman <btillman99@yahoo.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Need to Backup Using Dump Message-ID: <20111023210814.698a51b6.freebsd@edvax.de> In-Reply-To: <1319375054.79311.YahooMailNeo@web36507.mail.mud.yahoo.com> References: <000001cc90c0$a0c16050$e24420f0$@org> <4EA2CE72.5030202@cran.org.uk> <20111022161242.11803f76.freebsd@edvax.de> <4EA31702.7080406@locolomo.org> <1319375054.79311.YahooMailNeo@web36507.mail.mud.yahoo.com>
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On Sun, 23 Oct 2011 06:04:14 -0700 (PDT), Bill Tillman wrote: > I have two FreeBSD 8.2-STABLE servers running NFS. I have > tons of files on Server A that I want to backup to a big > drive on Sever B. Server B nfs_mounts one of the filesystems > on Server A to /mnt. So if I wanted to make a backup of > the filesytem on Server A to Server B I tried: > > dump -d /home/my_home/backups/20111024 /mnt > > but each time I try this it tells me that filesystem /mnt > is unknown. /mnt is not in /etc/fstab. I manually mounted > this via NFS and that's where all the files I want to backup > are accessible to the command line on Server B. What am I > missing? The dump + restore mechanism operates on device files representing a file system, not a _mounted_ file system, as source. If, for example, your /home partition is /dev/ad0s1e, and you've mounted the target at /mnt, then you could do: # cd /mnt # dump -0 -f - /dev/ad0s1e | restore -r -f - Therefore /home has to be unmounted (or add flag -L to dump from mounted file systems). But note that this will dump the _complete_ file system's content to /mnt as dump cannot be "more selective" here. An alternative is to use rsync or cpdup where you can explicitely address a subtree to be copied instead of the whole file system. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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