Strange CD + DVD Question

[Jaf]

Hey all, I have a friend with who asked me a very weird question. He said "Is it possible to know if a cd or dvd has been copied." He meant this as in, is there anything that happens to the original disc, can somebody tell if an original disc has been used to aid in copying. For why he wants to know this I honestly do not know as he is been very secretive like he normally is (hhmm fishy). Anyway I told him that I don't think its possible at all to tell if an orignal disc has been used to make a copy, but he wanted me to ask around lol. Does anyone else think an original disc would show clues whether it has been used in the aiding of copying lol.

Cheers.

 

[SCHUMIinSA]

As far as I know one can't tell weather an original has been copied, but one can usually tell is a disk is the original or not. Original have special numbers, label etc. which can't be copied as they are physically on the disk.
One can tell the difference between an Original cd of NFS-UG2 for instance and a copy.