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Subject: Re: turning on/off DAT compression
To: joerg_wunsch@uriah.heep.sax.de
Date: Mon, 25 Mar 1996 16:51:53 -0800 (PST)
From: "JULIAN Elischer" <julian@ref.tfs.com>
Cc: freebsd-scsi@freebsd.org, robsch@robkaos.ruhr.de
In-Reply-To: <199603252335.AAA11336@uriah.heep.sax.de> from "J Wunsch" at Mar 26, 96 00:35:25 am
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> 
> As Robert Schien wrote:
> > 
> > Has anyone a script or short program to turn on/off the compression
> > mode of a DAT drive? It seems that the 'mt' command doesn't support
> > such a command yet.
> 
> I've once posted a /usr/share/misc/scsi_modes definition for the mode
> page 0x10 (?) in this mailing list.  Using this, you should be able to
> edit the compression field in the mode page.  Alas, none of the drives
> avaible to me did really let me edit this field, so there are
> certainly other problems around.
> 
> (I've trashed my archive of freebsd-scsi, so i cannot repost this
> message now.  However, you should be able to dig it up in the mailing
> list archive on freefall, or via the WWW server.)
> 
> Once we know that it works, adding it to the ioctl(MTIOCOP) and to
> mt(1) is 5 minutes of work.
The IOCTL is already there!
and so is the code in the kernel! 
> 
> -- 
> cheers, J"org
> 
> joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
> Never trust an operating system you don't have sources for. ;-)
>