Well I've been having some problems with my late 08 macbook pro's superdrive. I insert a dvd backup (made on a dual layer dvd) and sometimes it will read it and sometimes it'll spit it out after attemping to read it for 10-15 seconds. If it does read it, it'll probably take 10-15 seconds for it to recognize the disc and in the course of this time it'll play a 3 tone musical sound. The sound is clearly coming from the superdrive. If I insert the commercial dvd it'll read very quickly and no musical sound gets played. Now if I connect an external dvd drive, it'll read my dual layer discs no problem so this issue is clearly related to the superdrive and not the mac os x. Are the superdrives this bad? Or is there something wrong with mine? Also, will I have better luck with these discs if I burn them using the mac? And if so, will it matter if I burn them with the super drive or my external drive?