Just about to upgrade the hard disk on my tivo. I have the thomson model with two hd's inside (a 15gb and a 30gb) Which of these will be the drive that I will have to image? (the one that contains all the tivo software etc) I've downloaded the 10mb cd that is needed to do the image and have a set of instructions of how to do it all, but the instructions refer to a single drive model. Was thinking of having the 120gb and the 30gb drive in the machine, or possibly two 120gb drives (if i can find a good deal on drives somewhere) Any ideas on which is the best hard disk to buy? Does a 7,200 rpm drive spin too fast and get too hot? Also have noticed that the system fan stays on even in standby mode. Is this normal?