>Also be aware that the Apple disk controller is a factor in how >large a disk drive you can use. For example, the ASIC used in the >iMac disk controller limits ATAPI storage to a 128GB drive. This >was a factor when I upgraded my iMac a year ago. There were a few >200 GB drives on the market then, which I would have liked, but I >was limited to (what now seems a mind-bogglingly miserly) 128GB. Peter, You are right. I just had to replace my original HD on my G4 Dual and I replaced it with a 160gb Maxtor internal only to find that I could only use 128gb of the HD. I wasted several $ on this one. Trueman