Cannot access retail DVDs with external drive

Ulrich Spoerlein uspoerlein at
Thu Jun 21 20:44:57 UTC 2007

Hi all,

the following drive, when attached via USB (or Firewire) fails to do
_anything_ with retail DVDs. I can read burned CDs just fine, however.

cd0 at umass-sim0 bus 0 target 0 lun 0
cd0: <PLEXTOR DVDR   PX-755A 1.06> Removable CD-ROM SCSI-0 device 
cd0: 40.000MB/s transfers
cd0: cd present [2042992 x 2048 byte records]

(cd0:umass-sim0:0:0:0): READ TOC/PMA/ATIP {MMC Proposed}. CDB: 43 0 0 0 0 0 1 0 c 0 
(cd0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
(cd0:umass-sim0:0:0:0): SCSI Status: Check Condition
(cd0:umass-sim0:0:0:0): ILLEGAL REQUEST asc:24,0
(cd0:umass-sim0:0:0:0): Invalid field in CDB
(cd0:umass-sim0:0:0:0): Unretryable error

This is with a recent kernel, and I'd like to know, if there are any
knobs I could/should try to debug this further.

Ulrich Spoerlein
"The trouble with the dictionary is you have to know how the word is
spelled before you can look it up to see how it is spelled."
-- Will Cuppy

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