*BSD News Article 23657


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From: vp@nemesis.csi.forth.gr (Vassilis Prevelakis)
Newsgroups: comp.os.386bsd.questions
Subject: Re: Does a Tape Filesystem exists?
Date: 11 Nov 1993 22:29:24 +0200
Organization: Institute of Computer Science, FORTH Hellas
Lines: 35
Message-ID: <vp.753049061@news.forth.gr>
References: <CFzsro.11J@cc.umontreal.ca> <CG0st1.6Hw@flatlin.ka.sub.org>
NNTP-Posting-Host: nemesis.csi.forth.gr

bad@flatlin.ka.sub.org (Christoph Badura) writes:

>In <CFzsro.11J@cc.umontreal.ca> surprenc@beryl (Leclerc Marco) writes:

>>I was wondering if a tape filesystem exists anywhere?
>>(so we could mount/umount a tape).

>You don't need a tape filesystem, you need a block device driver for
>the tape.  FFS does just fine on a tape.

In theory, however most modern tape drives (most is not all QIC
standard tape drives) do not support rewrites.  I am not sure but I
think exabytes do not support rewrites either (I don't have clue about
DAT).

This leaves only old 1/2" reel to reel tapes.  I know that the 1/2"
tape drives could in principle support filesystems but they were
SLOOOOW!!!.  I tried once to make a filesystem on a 1/2" under SunOs (3
or smth) and it didn't work.  I forget why and anyway I wasn't
desperate  to get it to work -- I just did it on an impulse (should
have tried warp :-).

So my advice is to forget it, its not worth it and will cause a lot of
wear on both the tape and the drive.  It is guarrantied to look
impressive though like the "computers" in old movies (of the 60s and
70s).

**vp

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