Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!think!ames!ucsd!ucsdhub!esosun!seismo!uunet!eda!jim
From: jim@eda.com (Jim Budler)
Newsgroups: comp.sys.apollo
Subject: Re: 8mm backup systems
Message-ID: <248@eda.com>
Date: 17 Oct 88 05:39:12 GMT
References: <231@merlin.bhpmrl.oz>
Reply-To: jim@.eda.com (Jim Budler)
Organization: EDA Systems,Inc. Santa Clara, CA
Lines: 27

In article <231@merlin.bhpmrl.oz> ianh@merlin.bhpmrl.oz (Ian Hoyle) writes:
>Any ideas on 8mm video tape backup systems suitable for Apollo's ??? I don't
>really want to contemplate backing up a DN10000 with 2.8 gigabytes of storage
>using a tape cartridge :-)
>		Ian Hoyle
Me, too.
But I'm a little more current.
I have a ring containing more than 3 Gbytes data.(our data not system space)
It's a real pain to back up to cartridge.

I can spend $30k to buy a DSP90 and a 6250 1/2" tape drive.

I could move the user data around the net in such a way to allow 50 Meg
segments of the ring to be backed up to cartridge in a rotating schedule
with no cartridge swaps required, but it would break periodically as
project data in segments grew. It would also require rearranging all our
disks, not a trivial task.

The 6250 tape drive would be better, but *very* expensive.

An 8mm video tape backup should cost about $6k including an interface
to a DN3000/DN4000 AT bus controller. 


-- 
uucp:     {decwrl,uunet}!eda!jim        Jim Budler
internet: jim@eda.com                   EDA Systems, Inc.