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To: obrien@FreeBSD.org
Subject: Re: cvs commit: src/share/man/man4 sa.4 
Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
In-reply-to: Your message of "Mon, 08 May 2000 12:10:50 PDT."
		<20000508121050.A51871@dragon.nuxi.com> 
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Date: Mon, 08 May 2000 13:32:50 -0600
From: Warner Losh <imp@village.org>
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In message <20000508121050.A51871@dragon.nuxi.com> "David O'Brien" writes:
: On Sun, May 07, 2000 at 06:23:45PM -0600, Warner Losh wrote:
: > On the 4.2BSD vax we had back in school, it was /dev/rmt8 and
: > /dev/nrmt8.  R stood for rewind, and has for a very long time.  The
: > SunOS 3.5 machine behaved exactly the same way.
: 
: R is raw.  A non-N tape device rewinds the tape when the device is
: closed.

When the raw device rewinds, how do you know that it stands for raw
and not rewind?  The nr device doesn't rewind.  The block device would
also rewind, and there was no non-rewinding block device.  It was
there even in SunOS 3.5 for compatibility.  None of the scripts we
used used the block device and in fact I think we had problems using
the block devices.

We should just stop arguing about what it has ment historically and
say that "rsa0" is the rewind device and the "nrsa0" is the non-rewind
device and not worry about renaming of the device entries.  This would
match historical use and we'd not have to worry about block vs raw and
we won't break all the backup scripts in the world.

Warner


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