After three years of having my dual G4/800, I replaced the SuperDrive with a new Pioneer DVR-109/A09 drive. I didn't realise that it was so bad and that stems from it being something new to me back in 2002. Recently, I was attempting to repair my hard drive using Tech Tool Pro 4 and the analysis took something like 16 hours. Well, it's not been 6 hours yet and TTP4 is creating the replacement volume structures now. I'm surprised how much time it spent using the drive. It's amazing that I had that sort of patience. Pioneer certainly makes good drives...at least, the ones that are good...are good. It's amazing to me that the whole system seems more responsive. It wouldn't seem probable that the optical drive would cause problems for the hard drives.