This is a topic that's been brought up by my myself and Chuck Mead
<[EMAIL PROTECTED]> on linux-kernel, but at this piont I think it deserves
overlap to this list.

Here's the basic problem.  I/O with both the fdomain SCSI disk and another
device (in my case CD-ROM in Chuck's CD or ftp) at the same time leads to a
timeout in the SCSI driver something like: (from Chuck's latest message)

kernel: scsi : aborting command due to timeout : pid 3351,
scsi0, channel 0, id 6, lun 0 Write (10) 00 00 39 f9 1b 00 00 80 00

After a bit (and a bunch of messages) this then panics the kernel ending with

Kernel panic: scsi: <fdomain> fdomain_16x0_queue() NOT REENTRANT!
In swapper task - not syncing

Both of us are using RH 6.0 with various 2.2 kernels.  Much more info can be
found in the following messages to linux-kernel (these are in chronological
order and do not inclued replies):

Chuck's original message
http://kernelnotes.org/lnxlists/linux-kernel/lk_9908_04/msg00296.html

My original message
http://kernelnotes.org/lnxlists/linux-kernel/lk_9908_04/msg01076.html

My next message (more info about my system)
http://kernelnotes.org/lnxlists/linux-kernel/lk_9909_01/msg00617.html

Chuck's latest message (lots of info about his system)
http://kernelnotes.org/lnxlists/linux-kernel/lk_9909_01/msg00912.html

Any advice or notes would be appreciated,
Thanks,
-Dean Townsley
<[EMAIL PROTECTED]>

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