Unfortunately, today I am really out of any luck and I came across another problem - this time with Key2Audio protection. So, here are my steps to confirm something is not right:
1. Rip the disc with ExactAudioCopy using physical Plextor DVD drive
2. Dump the disc with DiscImageCreator using physical Plextor DVD drive
3. load the image from step2 in virtual drive
4. Rip the disc with ExactAudioCopy using the virtual drive with DiscImageCreator image in it from step3
So, with all other discs ExactAudioCopy "TestCRC" Hashes match those from step1 and step4, i.e. ripping from the DiscImageCreator image in virtual drive is absolutely equivalent to ripping from the original physical media.
However, with my Key2Audio protected CD, ExactAudioCopy "TestCRC" Hashes from step1 and step4 are different. It's open question to me if ExactAudioCopy is correct or DiscImageCreator is correct, but it's the very first time I see difference between the the 2 applications and one of them must be wrong...
[EDIT] Decided to try with my Asus BW-16D1HT drive, this time:
* DiscImageCreator completely failed:
[INFO] This disc is Multi-Session. /ms is set.
Checking SubRtoW (Track) 18/18
Set OpCode: 0xbe, SubCode: 1(Raw)
Checking SubQ ctl (Track) 18/18
LBA[000001, 0x00001]: [F:ProcessReadCD][L:318]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-11-05 = MEDIUM_ERROR - L-EC UNCORRECTABLE ERROR
LBA[000001, 0x00001]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-11-05 = MEDIUM_ERROR - L-EC UNCORRECTABLE ERROR
End of readable sector
then it stop accessing the disc, creating for several minutes ".scmtmp" file, then more errors:
LBA[337562, 0x5269a]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337563, 0x5269b]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337564, 0x5269c]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337565, 0x5269d]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337566, 0x5269e]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337567, 0x5269f]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337568, 0x526a0]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337569, 0x526a1]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
ScsiStatus: 0x02 = CHECK_CONDITION
SenseData Key-Asc-Ascq: 03-02-00 = MEDIUM_ERROR - NO SEEK COMPLETE
LBA[337570, 0x526a2]: [F:ProcessReadCD][L:288]
Opcode: 0xbe
and at the end it reported something about "failed to analyze subchannel" - sorry but by accident I deleted the log, but bottom line is no any image was produced. I am even lost, which logs are beneficial to provide.
At the same time Asus BW-16D1HT with ExactAudioCopy produces the same Track hashes as Plextor with ExactAudioCopy. So, on this Key2Audio disc both Asus BW-16D1HT and Plextor PX-712A produce the exact same rips using ExactAudioCopy, i.e. the 2 drives are equivalent there.
[EDIT2] looking in hex-editor the differences, it seems some chunks of data are positioned at different addresses, for example on the attached screenshot what EAC put at 0x1ffffd0, DIC put at 0x2000000...
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