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Date:      Mon, 1 May 1995 10:49:31 -0700 (PDT)
From:      Poul-Henning Kamp <phk@ref.tfs.com>
To:        terry@cs.weber.edu (Terry Lambert)
Cc:        obrien@leonardo.net, hackers@FreeBSD.org
Subject:   Re: Compress dumps?
Message-ID:  <199505011749.KAA03641@ref.tfs.com>
In-Reply-To: <9505011729.AA07524@cs.weber.edu> from "Terry Lambert" at May 1, 95 11:29:46 am

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> > 	Just a thought, but has anyone given any thought to running the
> > "dump" data stream through 'gzip' on its way to the tape, so that we
> > don't have to buy quite as many QIC-80 tapes?  Sort of like the regular
> > CMS 'tape' program does under DOS/Windows?
> 
> I always want to cry when someone suggests stream compression on
> dump formats.

Terry,

In my 10+ years in computing, I have >once< had a chance to restore
from a damaged media which were still partially readable. 

Comparing that to how many tapes I've written, streams based compression
is a very low risk thing to do to save money.

How about this observation btw:

If I can compress at least 3:1, I can make two copies, and still save
33% on media... (Assuming you fill them of course).

-- 
Poul-Henning Kamp <phk@login.dknet.dk> -- TRW Financial Systems, Inc.
'All relevant people are pertinent' && 'All rude people are impertinent'
=> 'no rude people are relevant'



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