*BSD News Article 19965


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From: vp@nemesis.csi.forth.gr (Vassilis Prevelakis)
Newsgroups: comp.os.386bsd.misc
Subject: Re: Tape backup
Date: 25 Aug 1993 00:17:47 +0300
Organization: Institute of Computer Science, FORTH Hellas
Lines: 32
Message-ID: <vp.746226238@news.forth.gr>
References: <4867@bsu-cs.bsu.edu>
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alambert@bsu-cs.bsu.edu (Aric B. Lambert) writes:

>Is there a way to use my Colorado jumbo 250 tape backup with 386bsd

The quick answer is "probably no"

	a) it is very difficult to write drivers for devices connected to
the floppy disk controller (even diskette drivers are pushing things :-)
There is a nut case who claims to be working on this kind of driver but
so far we've only gotten endless essays from him.

	b) the jumbo 250 is not really 250Mbytes, its more like 125-150Mb.
I am not sure that the code for compression used to get 250Mb is
publicly available (judging from past postings for CMS to this group I
doubt it).  This means that if you want to exchange tapes with DOS you
have to use the uncompressed mode.

Why don't you get a QIC 150 tape drive.  With the newer 6250 tapes it
can go up to 250Mb uncompressed.  I have the Tandberg 3660 (bought from
a liquidator 2 years ago) connected to an Adaptec 1542B and I am very
happy with it.  When I use it to take backups from my Quantum 1225S
(also on the same 1542B) usinf dump(8), the tape streams continuously.

**vp

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