FreeBSD vs Region Code DVDs

[Ulrich Spoerlein]

Hi all,

I'm having a hard time getting my external (USB, Firewire) Plextor
PX-755UF to read any retail DVDs at all. I can read any kind of CDs and
also DVD-Rs. But mastered DVDs are invisible to FreeBSD.

I can not even read a single sector from such a DVD with the external
drive, but it's working just fine with the internal one. It's really
driving me nuts.

umass0: <PLEXTOR DVDR   PX-755A, class 0/0, rev 2.00/4.35, addr 126>
umass0:  8070i (ATAPI) over Bulk-Only; quirks = 0x0000
umass0:1:0:-1: Attached to scbus1
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: Attempt to query device size failed: NOT READY, Medium not present - tray closed
cd1 at ata1 bus 0 target 0 lun 0
cd1: <_NEC DVD_RW ND-5500A 1.51> Removable CD-ROM SCSI-0 device 
cd1: 33.000MB/s transfers
cd1: Attempt to query device size failed: NOT READY, Medium not present

The NEC drive can read DVDs just fine (although it sucks). 

% recoverdisk /dev/cd1
        start    size           len state          done     remaining    % done
            0 1048576    7411912704     0             0    7411912704 0.0000000^C
(130)% recoverdisk /dev/cd0
recoverdisk: DIOCGMEDIASIZE failed: No such file or directory
(1)% dd if=/dev/cd0 bs=2048
0+0 records in
0+0 records out
0 bytes transferred in 0.000093 secs (0 bytes/sec)

If I attach the device via Firewire, it's just the same. Perhaps it
requires some sort of quirk? Where should I start looking for debug
output? Which test should I run. Any help would be greatly appreciated.

Bye,
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