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Date: Thu, 13 Jun 2002 14:13:02 -0800
From: Christopher Swingley <cswingle@iarc.uaf.edu>
To: linux-kernel@vger.kernel.org
Subject: Re: Two panic's while burning +700Mb file to cdr (2.4.19-pre7+)
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Walter,

* Wolter Kamphuis <kernel@wkamphuis.student.utwente.nl> [2002-Jun-13
* 10:26 AKDT]:
> I'm unsuccessfully trying to backup a large 738Mb file to cdr. While
> burning this file the machine panic's. Doing a emergency sync
> (alt+sysrq+s) or emergency unmount (alt+sysrq+u) gives an second
> panic.

Although not exactly the same as your experience, I have a dual CPU
AMD machine that locks up when burning CD-RW disks.  The CDRW drive
is an IDE device that is running under SCSI emulation.  When I turn
DMA off on that device (/sbin/hdparm -d 0 /dev/hdc) it works fine
without any panics.

In my case there was no Oops, the system simply locked up tight.
The power button was the only option despite having Ctrl-Alt-Delete in
inittab and putting Alt-Sys-Req in the kernel (2.4.18 and 2.4.19-pre7).

Might be worth a try. . .

Chris
-- 
Christopher S. Swingley           phone: 907-474-2689
Computer Systems Manager          email: cswingle@iarc.uaf.edu
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