Ok, so I have this emac here and it has can burn CD's as well as DVD's. It doesn't seem to have any problem reading cds that are burnt or commercial cds but when you go to burn cds on it it will act like it's burning them but after it's done you have a new coaster. It doesn't matter if I burn with finder or Itunes the same thing happens, it just says that mac can't read the volume on the disc you inserted. I have a feeling that the burner is bad but could this be something corrupted in the OS? Should I do an archive and install? Would that fix this problem possibly?