From owner-freebsd-questions  Thu Feb 25 21:10:25 1999
Delivered-To: freebsd-questions@freebsd.org
Received: from kot.ne.mediaone.net (kot.ne.mediaone.net [24.218.12.203])
	by hub.freebsd.org (Postfix) with ESMTP id 092BA14EC6
	for <questions@FreeBSD.ORG>; Thu, 25 Feb 1999 21:10:23 -0800 (PST)
	(envelope-from mi@aldan.algebra.com)
Received: from rtfm.ziplink.net (rtfm [10.10.0.1])
	by kot.ne.mediaone.net (8.9.1a/8.9.1) with ESMTP id AAA02374;
	Fri, 26 Feb 1999 00:09:39 -0500 (EST)
From: Mikhail Teterin <mi@aldan.algebra.com>
X-Relay-IP: 10.10.0.1
Received: (from mi@localhost)
	by rtfm.ziplink.net (8.9.2/8.9.1) id AAA53904;
	Fri, 26 Feb 1999 00:10:27 -0500 (EST)
Message-Id: <199902260510.AAA53904@rtfm.ziplink.net>
Subject: Re: disabling compression on Seagate DAT (Arhive Python) drive
To: dkelly@hiwaay.net
Date: Fri, 26 Feb 1999 00:10:27 -0500 (EST)
Cc: questions@FreeBSD.ORG, tapesupport@seagate.com
X-Face: %UW#n0|w>ydeGt/b@1-.UFP=K^~-:0f#O:D7w<gv/&E-lL7twZCT8B~/PA4|\t$ti+22K">
	 hJ5G_<5143Bb3kOIs9XpX+"V+~$adGP:J|SLieM31VIhqXeLBli"<kcG^EOVih
	 y+z3/UR{6SCQ
X-Mailer: ELM [version 2.4ME+ PL49 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-questions@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

=Mikhail Teterin writes:
=> The manual says it is possible to do by a MODE SELECT command from
=> the host computer, but provides no specifics. Can someone, please,
=> share the knowledge? Ideally, I need an argument for FreeBSD-2.2.6's
=> scsi(8) command.

=First, I'd suggest an upgrade to 3.1-stable is in order.

Impossible :(

=... there is a "DC-Passthru" jumper and/or DIP switch on the Seagate
=drive which selects the compression state at power up. Under older
=FreeBSD's this means you don't have a means to enable compression.

It is possible to do this from host -- the "manual" says it is,
but refers you to ANOTHER manual, which is a Seagate part such-and-such.
Remarkably STUPID!

Now, there is also a "Seagate Unix Compatability Guide", also
written "for dummies", but I managed to get from it, that this
tapes use mode page 0xf, rather then 0x10 for compression settings.
My attempts to use
	scsi -f /dev/st0ctl.0 -m 0xf -P 3 -e

failed even after I duplicated the 0x10 entry in /usr/share/misc/scsi_modes
as 0x0f entry. It does not bring up an editor, contrary to what
man-page says...

So, if there is another magic sequence, which I can just put into
the crontab right before Amanda's run, so as to be sure, I'd very
much appreciate it.

Thanks!

	-mi


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message