Strange problem

I tried to copy a Linux Mandrake 7.1 CD which i got from a PC magazine.

First attempt : Copied the CD with Nero and executed the setup.The result was an error message which said “Invalid Linux CD” or something like that.

Second attempt : Copied the CD with CloneCD.The result was the same as before.

Third attempt : Copied the CD with EasyCD 4.The result was finally a CD that worked :confused:

I’ve never had such problems with any other CD , but this one was really strange.I can’t really find any ideas to explain why something like that could happen :confused: