*BSD News Article 81422


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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: whats a good external SCSI tape?
Date: 23 Oct 1996 22:55:11 GMT
Organization: Private BSD site, Dresden
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Frederic.Marand@osinet.fr (Frederic MARAND) wrote:

> >Tandberg 2.5 GB QIC are fine (the latter is for those like me who find
> >helical scan to be inherently horrible :).

> It seems many  people dislike helical scan backup units, but I never
> could figure out why: ...

Because the mechanics are much more fragile _by design_.  I've seen
jamming tape cartridges that self-destroyed the tape on exertion, for
example (on an otherwise fine working) HP-DAT drive.

As long as you can tolerate this (e.g. by cycling through 7 tapes per
week, so it doesn't harm much if one of them is lost), it's ok.

Also, helical scan drives are told to have a higher abrasion rate, so
you ought to throw away a cassette after 50 or 100 hours.  This partly
compensates for them being cheaper than e.g. QIC.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)