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Re: Tape backup software?



On Tue, Jul 25, 2000 at 09:04:53AM -0600, Gary Hennigan wrote:
> "Andrew McRobert" <mcrobert@central.murdoch.edu.au> writes:
> > I have to say that i find that "tar" covers all bases pretty well ...
> > depends what you're used to I guess.
> 
> There's at least one issue with tar that's kept me from using it, you
> don't want to use software compression with tar. Tar compresses
> globally, which means that the whole of the archive is considered one
> big compressed file. If something happens to the beginning of the tape
> you wouldn't be able to recover any of the data on that tape. This is
> in contrast to something like afio which compresses a single file at a
> time and then copies it to tape. Of course if you have hardware
> compression, or a lot of tapes, this may not be an issue.

Bingo on HW compression.  With tape archives in general, I'd advocate
reliability over compression anyway.

-- 
Karsten M. Self <kmself@ix.netcom.com>     http://www.netcom.com/~kmself
 Evangelist, Opensales, Inc.                    http://www.opensales.org
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