[3746] in linux-scsi channel archive
Re: exabyte and the aic7xxx...
daemon@ATHENA.MIT.EDU (Jeff Collins)
Wed Apr 22 16:44:10 1998
Date: Wed, 22 Apr 1998 13:40:41 -0700 (PDT)
From: Jeff Collins <collinsj@ece.ucdavis.edu>
To: Walt Bigelow <walt@stimpy.com>
cc: linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.LNX.3.96.980422125448.23896A-100000@alice.stimpy.com>
On Wed, 22 Apr 1998, Walt Bigelow wrote:
> I have been having the some problem over and over lately when trying to
> use my exabyte "exb-8505" tape drive. THe problem is when I access the
> tape via st0, and tar, the machine "locks" up and then proceeds to "abort
> command due to timeout" over and over. Then eventually the scsi bus
> resets, and the machine stops responding. I have had this problem with 2
> different drives over 3 machines all witht the aic7xxx driver and
> different versions of the linux kernel. THe exabyte works fine on my SGI
> workstation.
I don't know anything about the aic driver, but I've had this same
behavior with exabyte tape drives and my buslogic. In my case, this only
happens if I disable disconnection for the device in question. Basically,
the driver issues a rewind or a retension command and without the ability
to disconnect, the entire bus is tied up until the command completes. You
could also try enabling tagged queueing. --jw
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Jeff Collins, collinsj@ece.ucdavis.edu, Computer Engineering Research Lab
Electrical and Computer Engineering, The University of California, Davis
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