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Date:      Mon, 14 Dec 1998 18:49:45 -0800 (PST)
From:      Matthew Jacob <mjacob@feral.com>
To:        Greg Lehey <grog@lemis.com>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: Tape Driver Changes Proposed: Tape Early Warning Behaviour
Message-ID:  <Pine.LNX.4.04.9812141848230.2563-100000@feral-gw>
In-Reply-To: <19981215131522.G15633@freebie.lemis.com>

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> >> Down the road a little bit would be:
> >>
> >>>> untangling the minor device as behaviour selector so that
> >>	ioctl's would not have to be used to select compression.
> >
> > This should be controversial :-).  Compression is another type of
> > behaviour.
> 
> Is this an argument for or against the change?
> 
> I'm for the change, anyway.  Currently it's not possible to tell a
> backup utility to write in compressed or uncompressed mode.  If I have
> different devices, I can do this.  It's been this way in ever other
> UNIX I've used.


You *can* enable/disable compression, and we could even make the change
persistent across tape mounts, but the issue here is whether or not you
also want to go and change the N different backup utilities to use the
appropriate ioctl to select compression or not.

-matt



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