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From: Ollivier Robert <roberto@keltia.frmug.fr.net>
Message-Id: <199507132331.BAA00831@keltia.frmug.fr.net>
Subject: Re: How to enable/disable hardware compression with HP DAT
To: jc@irbs.com (John Capo)
Date: Fri, 14 Jul 1995 01:31:29 +0200 (MET DST)
Cc: freebsd-hackers@freefall.cdrom.com
Reply-To: roberto@keltia.freenix.fr (Ollivier Robert)
In-Reply-To: <199507132237.SAA16948@irbs.irbs.com> from "John Capo" at Jul 13, 95 06:37:34 pm
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It seems that John Capo said:
> It will be eaisest to disable compression via the option switches.

I don't want to disable all the time, just when I  know I will write a tape
for someone without a DDS-DC drive.

> The compression is controlled by mode select page 0x0F according
> to the docs I have for a HPC1553A which is a drive with an autoloader
> that holds 6 tapes. Byte 2, bit 7 controls compression. Byte 3,
> bit 7 controls decompression.  A vaule of 1 enables, 0 disables.

Thanks for the info.
-- 
Ollivier ROBERT    -=- The daemon is FREE! -=-    roberto@keltia.frmug.fr.net
   FreeBSD keltia 2.0-BUILT-19950713 #2: Thu Jul 13 21:01:53 MET DST 1995