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| Posted by | Jan Willem |
| Posted on | 22/05/01 21:25 |
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Besides RAW there is another word that you will notice when you get intrested in backing up copy protected CD's; SubChannel Data. Here's an explanation:
SubChannel DataBesides the standard RAW methods like DAO and SAO-RAW (see What is RAW?) there is also RAW-96 and RAW-16 in which the numbers stand for the type of SubChannel Data that is supported.
SubChannel Data: The SubChannel Data is used to store extra information in. This can be part of a protection (a digital ID is stored) or simply to add extra info to a disc like CD-Text for audio discs. Some protections that use SubChannel Data are SecuROM, LibCrypt (PlayStation) and LaserLock.
SubChannel 16 or 96? This looks hard, but the only protection that uses 96 bytes of SubChannel Data is the LibCrypt protection that is used on PlayStation games. If you want to copy a PlayStation disc your writer has to support the reading and writing of 96 bytes of SubChannel Data. These writers are for example Plextor, Sony and ACER. For a complete list of writers that can read 96 bytes of SubChannel Data you should check the CloneCD Hardware Requirements.
If your burner supports the reading and writing of 96 bytes of SubChannel Data, it will also be able to read and write the 16 bytes version, however if your burner can only read and write the 16 bytes of SubChannel Data, it will not be able to read and write the 96 bytes version. So if you want to get a new writer and back-up PlayStation games this is something to keep in mind.
Conclusion:
SubChannel Data is used to store extra CD information. There are some protections that use this to store a digital ID in. If a game with this protection is started and the ID is not present, the back-up will not work.
There are two types of SubChannel Data: the 16 and the 96 bytes version. De 96 bytes version is only used for PlayStation games and is called the LibCrypt protection. The 16 bytes version is used with the SecuROM and LaserLock protection and besides that with karaoke discs and other discs that use CD-Text.
The latest copy protections use this data, and therefor you should get a drive that is capable of reading and writing them. If your drive is not able to handle them properly, your backups may not work, and you will need cracks.
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Posted by sushil (guest) on Tuesday 21 August 2007 08:52
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