When I backed up my personal imac with a firewire 400 external hard drive it was talking about an hour per gig. I stopped and started it a few times and then it finished backing up 110gb in about 3 hours. Now my my fathers imac, his Time Machine is doing the same thing, granted he has a 500gb usb hd but at this rate it will take 2 days to back up. It is moving soooooo slow. Anyone else experiencing god awful initial backup times?