FreeBSD vs Region Code DVDs

[Ulrich Spoerlein]

Sean C. Farley wrote:
> On Thu, 3 May 2007, Ulrich Spoerlein wrote:
> I had an issue with ripping some DVD's to my laptop before a trip I made
> (note:  no distribution occurred (for the lawyers :))).  I wanted to
> just use dd to do it, but dd would fail after a small amount of data was
> read.  If I first played a little of the DVD with mplayer, then dd would
> work afterwards.  It probably had something to do with mplayer
> whispering sweet nothings to the DVD player.

Wouldn't help in my case, as the disc cannot be accessed in anyway.

But ...

atausb(4) to the rescue!

I recompiled my kernel with atausb(4) to rule out problems inside CAM,
lo' and behold:

umass0: <PLEXTOR DVDR   PX-755A, class 0/0, rev 2.00/4.35, addr 121>
umass0:  8070i (ATAPI) over Bulk-Only; quirks = 0x0000
umass0:3:0:-1: Attached to scbus3
cd1 at umass-sim0 bus 0 target 0 lun 0
cd1: <PLEXTOR DVDR   PX-755A 1.06> Removable CD-ROM SCSI-0 device 
cd1: 40.000MB/s transfers
cd1: cd present [3614880 x 2048 byte records]

(no glabel tasting, no reading from the device possible)

umass0: at uhub3 port 1 (addr 121) disconnected
(cd1:umass-sim0:0:0:0): lost device
(cd1:umass-sim0:0:0:0): removing device entry
umass0: detached
atausb0: <PLEXTOR DVDR   PX-755A, class 0/0, rev 2.00/4.35, addr 121>
atausb0: using ATAPI over Bulk-Only
ata2: <USB lun 0> on atausb0
acd1: DEVICE_RESET unsupported
acd1: DVDR <DVDR PX-755A/1.06> at ata2-master USB2
acd1: FAILURE - INQUIRY ILLEGAL REQUEST asc=0x24 ascq=0x00 
cd1 at ata2 bus 0 target 0 lun 0
cd1: <PLEXTOR DVDR   PX-755A 1.06> Removable CD-ROM SCSI-0 device 
cd1: 3.300MB/s transfers
cd1: Attempt to query device size failed: NOT READY, Logical unit is inprocess of becoming ready
GEOM_LABEL: Label for provider acd1 is iso9660/FIREFLY_DISC2.
acd1: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 
acd1: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 
acd1: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 
acd1: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 
acd1: FAILURE - READ_TOC ILLEGAL REQUEST asc=0x24 ascq=0x00 

Might these ILLEGAL REQUESTs give a clue to what is going wrong when
trying to access this device with cd(4)? Why is it only reporting/using
3.3MB/s transfers? Why can I read and mount the DVD, but mplayer/xine
are still unable to play the DVD? (It works fine on the internal, ATA
attached, crappy NEC drive.)

Perhaps Scott can share some SCSI wisdom on this matter. I really need
to use this drive via Firewire, ie. cd(4), so atausb(4) is no permanent
solution.

Ulrich Spoerlein

PS: why is iostat(1) not working for acd(4) devices?
-- 
"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."
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