[3983] in linux-scsi channel archive
Re: Controlling Sun DAT tapes
daemon@ATHENA.MIT.EDU (Phil's Kernel Account)
Sat May 23 12:56:39 1998
Date: Sat, 23 May 1998 12:56:00 -0400 (EDT)
From: "Phil's Kernel Account" <kernel@eiterra.nls.net>
Reply-To: kernel@nls.net
To: Stephen Harris <sweh@mpn.com>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <199805230007.BAA23309@nebula.mpn.com>
On Sat, 23 May 1998, Stephen Harris wrote:
#Dear all,
Dear Stephen :),
# I have a Sun DAT tape drive that I want to plug into my Linux
# machine (AHA1542 controller). It's an old old DDS-1 tape drive.
Hey, better than nothing. :)
# The drive itself seems to work fine, *BUT* it appears to write data in
# compressed format. When I try to read it on a Wangdat 3100 I get an
# error. Writing tapes under Solaris worked fine (I've transferred many
# Gb of data in this way) but now I've moved the drive to Linux I seem to
# be out of luck :-(
Ah, maybe. Maybe not. Cross your fingers.
# Now, I seem to remember that Sun DAT drives had a modified controller so
# that compression could be controlled by software. Under Solaris this was
# based on the minor device number of the tape drive.
*dingdingding* We have a winner! Almost. The tapes used 'SunSCSI' which
isn't 100% compatible with PC-SCSI IIRC. I probably don't. I migrated to
fibrechannel RAID on the SPARCs so long ago, I don't remember too much
about their SCSI stuff. Anyways.. this does sound correct, but don't hold
me to it. :)
# Is it possible to control the tape drive in such a fashion under Linux?
# Basically, I want to turn compression off!!!
# Vendor: ARCHIVE Model: Python 28454-XXX Rev: 4ASB
# Type: Sequential-Access ANSI SCSI revision: 02
*dingdingding!* Got any jumpers on the beast? There should be a block of 6
or 7 for ID. And probably 3 or 4 more. Start playing around. One of those
most likely controls the compression and/or write methods for the drive!
If you can find that one, you SHOULD be set. How do I know this? I'm not
positive. However, I remember a machine at work, which is a PC, USED to
have a Python DDS1, and it had quite a few jumpers. Nice drive. Performed
well, lasted FOREVER. Just was too small. ;(
-Phil R. Jaenke (kernel@nls.net / prj@nls.net)
TheGuyInCharge(tm), Ketyra Designs - We get paid to break stuff :)
Linux pkrea.ketyra.INT 2.0.33 #15 Sat Apr 18 00:40:21 EDT 1998 i586
Linux eiterra.nls.net 2.1.98 #15 Fri May 1 18:21:00 EDT 1998 i586
- Linus says for 'brave people only.' I say 'keep a backup.' - :)
! I reserve the right to bill spammers for my time and disk space !
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@vger.rutgers.edu
