[572] in linux-scsi channel archive
Re: Panasonic PD drive & Linux
daemon@ATHENA.MIT.EDU (Doug McNaught)
Fri Sep 1 01:14:19 1995
Date: Thu, 31 Aug 1995 17:40:53 -0400
From: Doug McNaught <doug@pluto.towson.edu>
To: roberte@s3two.ie
CC: linux-scsi@vger.rutgers.edu
In-reply-to: <9508311508.314D8C@escher.s3two.ie> (message from Robert Early on Thu, 31 Aug 95 11:08:49 EDT)
>From: Robert Early <roberte@s3two.ie>
>Reply-To: roberte@s3two.ie
>Date: Thu, 31 Aug 95 11:08:49 EDT
>X-Mailer: E-Mail 1.6
>Sender: owner-linux-scsi@vger.rutgers.edu
>Precedence: bulk
>
>
>System: 486/66 VLB, Adaptec 2842, Quantum 1Gig SCSI HDD and an
>internal Panasonic PD drive (combined CD-ROM and Optical disk in one
>unit). Linux 1.2.13.
>
>I recently added the PD drive to my system, but I am having problems
>reading/writing to optical disks under Linux. I can mount the optical
>disks (dos format) fine, but whenever I copy a large file > 1meg to or
>from the disk, the system locks up completely and the machine has to
>be reset. I have been using it for a while now under dos/Windoze with
>no problems, regardless of file size. The CD-ROM function works fine
>under Linux. I have read the scsi-faq and all I can gather from it is
>that there may be a problem with termination or cables. I don't think
>either of those could be the problem because it only happens in Linux.
>Has anyone else had the same or a similar problem?
[I reformatted your post; please try to keep your line lengths under
75 characters.]
We are using a PCI system with a 2942. We also run into system
freezes, usually when backing up to DAT. What 2842 drivers are you
using? I know they're not in the standard 1.2.13 kernel, so you must
have got them from somewhere and patched them in. Ours are pretty old
but I haven't been able to find any more except for the ones in the
1.3.XX kernels, which are much too unstable to run. Ours seems to give
"SCSI timeout" errors while writing to the tape drive about 10 minutes
before it freezes (this is a fairly good correlation). Based on what
I've seen it seems to me that the card and/or drivers just can't
handle some SCSI errors and freeze the machine rather than recovering
gracefully (by returning an I/O error to 'tar'). I'm not enough of a
SCSI hacker (and this is a production machine) to delve much further
into it. My fix for the moment is to move the tape drive to another
(ISA/VLB) machine, once I can afford a 1542 to put in it... Once the
1.3.XX kernels are even semi-stable I may try them as well, at least
temporarily.
Anybody else run into this with the 2842/2942? What drivers are people
using?
-Doug
--
Doug McNaught Systems Integrator Towson State University
Internet: doug@midget.towson.edu *or* mcnaught-d@toe.towson.edu
BITNET: e7opdam@towsonvx Office: Cook 28D, (410) 830-4148
WWW Home Page: http://www.towson.edu/~doug/
