[Cdrdao-devel] Attempt to read Mode2 DVD fails

[David A. <dav...@pa...>]

Hello,

I posted this on the sourceforge Cdrdao forum but then realised, after 
looking at the number of replies for past messages, that it probably won't 
get much visibility there. So I re-post here in the hope that solving this 
problem might help others (I know of one other person already on 
forums.gentoo.org who has this same problem) as well as myself.

I am trying to use cdrdao to read and backup my (legitimate) Playstation2 
game DVDs in Linux (Gentoo, 2.6.11.6). I have tried two different DVD 
drives (a 3 year old Samsung and a brand new LG GSA-4163B) without 
success. The software seems unable to instruct the drive to reading the 
TOC as a mode2 disk. I'm no expert here at all, but it seems to me that 
the driver is reporting failed capabilities and reverting back to mode1, 
which then fails later. There is a trace of the output from cdrdao 
included at the end of this email.

I have tried cdrdao 1.1.9 and 1.2.0. I have tried the generic-mmc and the 
generic-mmc-raw drivers - both exhibit the same behaviour. I have tried 
all the options in the cdrdao README (e.g. --driver generic-mmc:0x3) with 
little success. I have even looked at the source code. Here is where it 
fails (as long as I don't have the :0x10000 option set - see below):

GenericMMC.cc:2038
--------------------------------
// read disk toc length
memset(cmd, 0, 10);
cmd[0] = 0x43; // READ TOC
cmd[2] = 2;
cmd[6] = sessionNr;
cmd[8] = 4;

if (sendCmd(cmd, 10, NULL, 0, reqData, 4) != 0) {
message(-2, "Cannot read disk toc.");
return NULL;
}
--------------------------------

A 'normal' DVD (e.g. the installation DVD that came with the drive) can be 
read fine (although it's mode 1). All of my PS2 disks fail (they are all 
mode 2 I think).

I did find that 'generic-mmc-raw:0x10000' gets rid of the first error 
("ERROR: Cannot read disk toc.") but it still reverts to MODE 1 and then 
fails in the same way (and obviously somewhere else in the code).

Most recently I tried using the drive with Nero in Windows to read PS2 
disks, and it works fine.

Is there anything else I can do to try and work out a fix? Can I somehow 
collect more information on what is happening to assist with finding a 
resolution?

Thanks in advance for any assistance.


--- TRACE ------------------------------

# cdrdao read-cd -v 4 --read-raw --device ATA:1,0,0 --driver 
generic-mmc-raw gamename.toc
Cdrdao version 1.2.0 - (C) Andreas Mueller <an...@da...>
SCSI interface library - (C) Joerg Schilling
Paranoia DAE library - (C) Monty

Check http://cdrdao.sourceforge.net/drives.html#dt for current driver 
tables.
Format converter enabled for extensions: mp3 ogg

Using libscg version 'schily-0.8'
Using libscg transport code version 'schily-scsi-linux-sg.c-1.83'

ATA:1,0,0: HL-DT-ST DVDRAM GSA-4163B Rev: A100
Using driver: Generic SCSI-3/MMC (raw writing) - Version 2.0 (options 
0x0000)

Reading toc and track data...
getTocGeneric: data len 20
ERROR: Cannot read disk toc.

Track Mode Flags Start Length
------------------------------------------------------------
1 DATA 4 00:00:00( 0) 360:20:52(1621552)
Leadout DATA 4 360:20:52(1621552)

Checking for PQ sub-channel reading support (data track)...
PQ sub-channel reading (data track) not supported.
Checking for raw P-W sub-channel reading support (data track)...
Raw P-W sub-channel reading (data track) is not supported.
Checking for cooked R-W sub-channel reading support (data track)...
Cooked R-W sub-channel reading (data track) is not supported.
ERROR: Cannot read sector of track.
WARNING: Cannot determine mode of data track 1 - asuming MODE1.
Copying data track 1 (MODE1_RAW): start 00:00:00, length 360:20:52 to 
"data.bin"...
/home/david/src/cdrdao-1.2.0/dao/cdrdao: Success. : scsi sendcmd: no error
CDB: BE 00 00 00 00 00 00 00 1A F8 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 05 00 00 00 00 10 BE F8 00 08 24 00 00 C0
Sense Key: 0x5 Illegal Request, Segment 0
Sense Code: 0x24 Qual 0x00 (invalid field in cdb) Fru 0x0
Sense flags: Blk 0 (not valid) error refers to command part, bit ptr 0 
(not valid) field ptr 0
resid: 61152
cmd finished after 0.001s timeout 20s
ERROR: Read error while copying data from track.


-- 
David.