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Subjectide_scsi problems in 2.4.20-pre7-ac3
I have been having problems with a Plextor CD-R connected to a PDC20268 
(Promise Ultra-100TX) using the UDMA-2 and the ide_scsi driver since the
driver first appeared. It's been improving, but as of 2.4.20-pre7-ac3,
I'm still having problems. The card is in a 33Mhz slot on a Micronics
W6LI board.

When I write to the drive (hdg, seen as scsi ID 0) with cdrecord, it will
write successfully for some time (usually 30 MB or more, sometimes even
completing a write), whereas in older kernels it would fail between 1-4

The only log message I get is
ide_scsi: scatter/gather table too small, padding with zeroes.

and about 10 seconds later the system hangs.

Related to this is that after this happens and I restart the machine, the
PDC20268 drivers will report timeouts resetting the card, and the only way
to regain control of the CD-R is to power the machine down.
(I will send this in a seperate message).


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