I have few years old LG blu ray burning drive. It worked perfectly for most time, but recently I have problems to burn anything. Burning software is reporting a bad sectors (and similar talking, depends on software), then fail a burn process and ejectcs wasted blu ray disc. Today I had seven discs in a row which ended that way. Eight one was burned without any problem. So my question is, how to determine if drive is going haywire or if I somehow got a bad bundle of disc (but seven of ten in one package? Average three bad in every package in recent months? Not sure if that is possible). I was thinking about dust on lense, but that would create a problem in every single burn process, right? Plus the thing is reading perfectly. I am really not sure what to think about this.