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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 
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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