Since the connectors are different you will need an adapter. http://www.mac-pro.com/s.nl/sc.2/category.134/it.A/id.276/.f And, you don't want to mistake the 400 regular to 400 mini adapter for the 800 to 400 adapter. FWDepot Support wrote: > you can daisy chain from any firewire port > > when connecting from a firewire 400 device to a firewire 800 device, > the firewire 800 device will act as a firewire 400 device (in terms of > speed/performance) > > On Dec 30, 2004, at 9:13 AM, Dale Hoffman wrote: > >> I just bought two Firewire drives equipped with FW400 and FW800 >> ports. I don't have FW800 connections on any of my computers and was >> hoping to daisey chain these two drives.... >> >> DaleH >> _______________________________________________ >> FireWire mailing list >> FireWire at listserver.themacintoshguy.com >> http://listserver.themacintoshguy.com/mailman/listinfo/firewire >