As far as I can folow you are correct. a ide bus will work as slow as the slowest item being accessed on that bus , IE when I\'m burning a cd, I never access my zipdrive that is on the same cable, as it creates buffer under runs, I dont know if the drives are running at the same ata speed tho. my cdrw drive runs at ata 33 while my zip drive is stuck on pio 4