> > My question is: the FW400 drive is for backups only > > and it gets turned on at the end of the day when my > > work is done. Since it is not turned on or mounted on > > the desktop I presume that my FW800 drive will run at > > 800. > > I believe so, but it's easy enough to check. Try > copying files to it > via 400 and 800 - the difference in speed is fairly > obvious on my > FW800 drive when running at 800. I did some admittedly unscientific testing and got confusing results. I tried copying a 2.85g file to the FW800 drive and it consistently copied it in app. 65 seconds. I copied it several times. First with the second FW400 drive unplugged, again with the drive plugged in but not turned and once again with the FW400 drive plugged in, turned on, and mounted. Each time the speed was identical using only the G5 FW ports. I copied one more time to the FW800 drive but this time I used the 400 output and the file copied at 90 seconds. Not sure what to conclude here but there was no performance difference with both the FW800 and the FW400 mounted on the same FW bus. JP