>Will the hard drive that came in a Power Mac 6100/66 fit in a Duo 2300c? No powerbook will fit a 3.5" hard drive. 2300 takes 2.5" SCSI or IDE. In >a Duo Dock? Yes, and any 3.5" half height or 1/3 height SCSI hard drive will fit, as long as you have the sled and two cables to do it with. Paul