This is a reproducible OOPS for me.  I mount the drive, cd into the 
directory which it is mounted in, attempt to 'ls' the dir.  On the first  
attempt to 'ls' I get: 

paranoia kernel: scsi1: ERROR on channel 0, id 0, lun 0, CDB: Request Sense 00 00 00 40 00
paranoia kernel: Info fld=0x0, Current sd0b:00: sense key Medium Error
paranoia kernel:  I/O error: dev 0b:00, sector 96
paranoia kernel: scsi : aborting command due to timeout : pid 0, scsi1, channel 0, id 0, lun 0 Read (10) 00 00 00 00 18 00 00 01 00
paranoia kernel: hdd: timeout waiting for DMA
paranoia kernel: ide_dmaproc: chipset supported ide_dma_timeout func only: 14

After waiting a second or so for the bus to reset, another 'ls' OOPSes the 
kernel.  I've inline attached the output of the oops I've run thru our 
friend ksymoops below.

The cd-r is an HP CD-Writer Plus (atapi with ide-scsi module).  I can burn 
CDs no problem, listen to music thru it no problem.  This OOPS only occurs 
when I try to use the drive to mount an iso9660 filesystem (ie. a data cd)

Thanks in advance for any help. 
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/************************/
/*    J. Troy Piper     */
/*    <jtp@dok.org>     */
/* Ignotum per Ignotius */
/************************/