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From: migieger@luva.stgt.sub.org (Michael Giegerich)
Subject: dump parameters for HP 35480 DAT drive
Organization: private FreeBSD site
Date: Mon, 20 Jun 1994 19:24:25 GMT
Message-ID: <Crpn94.21B@luva.stgt.sub.org>
Lines: 31
Hi,
I have this little gem of DAT drive and can't force it to do
what I want, grrrr...
I found out that the drive uses 61000 bpi media, but a 90 m
(295 feet) cartridge gives me 295*12 in * 61000 bpi = about 200 MB.
Much lesser than the 2 GB uncompressed and the 8 GB compressed
data a cartridge should hold (yes I know, that's unlikely to stuff
8 GB of gzip'ed code onto the cartridge).
So I'm puzzled what tape length I must give to dump as parameter...
And is it up to me to _guess_ what is the tape length parameter
with compression enabled?
One friend told me "I'm using a ridiculous high tape length on a
Sun to fake unlimited tape - with the disadvantage that I must be
sure I haven't to change tape" :-(
I would consider this only as 2nd best choice...
Bye,
-Michael
P.S. Please give the apropriate restore commands and the /dev to
use too (it saves me endless tries and errors). Thanks.
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Michael Giegerich | migieger@luva.stgt.sub.org
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