Date: Thu, 12 Jun 1997 15:40:14 -0600 (MDT) From: Brandon Gillespie <brandon@ice.cold.org> To: Lyndon Nerenberg <lyndon@ve7tcp.ampr.org> Cc: freebsd-questions@freebsd.org Subject: Re: dump/restore with compression Message-ID: <Pine.NEB.3.95.970612153906.6204A-100000@ice.cold.org> In-Reply-To: <199706122031.OAA01000@ve7tcp.ampr.org>
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On Thu, 12 Jun 1997, Lyndon Nerenberg wrote: > > One option (it's a bit heavyweight I'll admit) is to install amanda > and use it to run the backups. It can compress the dump sets on the > way to the tape if you like. > > In my case, I never compress backups. If you get a single I/O > error on a tape, you have almost no hope of retrieving any data > stored beyond the error. Uncompressed backups in dump format > can handle and recover from this. (Compression done in the tape > drive includes a *lot* of redundent information to help handle recovery > from bad media situations.) > Perhaps its how I'm executing dump, but when I run a tar of a filesystem, to tape, I can get the whole filesystem (without compression) but when I run dump, it asks for me to put in another tape without backing up the whole filesystem... I'm calling dump as: dump 0uf /dev/nrst0 /u1 -Brandon Gillespie
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