CRC errors with dvd data backups while trying to copy to HD

[Inigo Montoya]

I have recently noticed that on some of my dvd data backups using Princo media and a Pioneer a104 dvd writer have crc errors. These are fairly new backups and don't have any scratches that would do this. I get a error that says Cannot Copy (file name) and then says it's because of a crc.
Why is it doing this?
Can I do anything to salvage these files?
Is there a crc checking program that would tell me which discs are corrupted?


Any suggestions would be very helpful as so far no one seems to know what the solutions are.

[Inigo Montoya]

Does somebody at least know of a program that would check for crc errors on discs, not just archives (found one that will do that).

By the way I think I posted too soon because after checking a third of my dvd backups manually I have only had one that has crc errors while trying to copy. And it is fairly scratched. I still don't see any scratches that should mess it up that much but who knows. At least the majority of my time hasn't been wasted!