i've got a mid '09 whitebook, and whenever i am burning cd-rs in itunes (haven't tried just burning data discs) it seems like the speed is wayyy too high and it is extremely loud and makes the whole computer vibrate. the "preferred speed" on itunes is set to "maximum," but it's always been set to that and this sound isn't normal. it's been like this for a while, so i've just avoided burning cds as much as possible. but something just doesn't seem right about it. i mean, it still reads and writes, but i feel like i'm going to break it! this can't be normal can it? or does anyone else have this problem? thanks for your help.