Need to Backup Using Dump

Peter Vereshagin peter at
Sun Oct 23 19:16:01 UTC 2011


2011/10/23 21:08:14 +0200 Polytropon <freebsd at> => To Bill Tillman :
P> The dump + restore mechanism operates on device files
P> representing a file system, not a _mounted_ file system,
P> as source.

dump(8) is able to make a snapshot behind teh scenes, and use that snapshot as
a source for dump:

    -L      This option is to notify dump that it is dumping a live file sys
             tem.  To obtain a consistent dump image, dump takes a snapshot of
             the file system in the .snap directory in the root of the file
             system being dumped and then does a dump of the snapshot.

Peter Vereshagin <peter at> ( pgp: A0E26627 

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