Hi, I recently tried to mount a Seagate external HD via Firewire on my PowerBook G4 laptop. HD does not appear in Disk Utility via Firewire 400. However it does appear via USB. I've tried with two different HD's - same results. I've returned the HDs, but I'm wondering: think it's a problem with my Firewire? Anyone else have a problem with laptop Firewire? This is the first time I've tried using the Firewire port. The weird thing is that the "powering up" sound on the external HD gets played through my computer speaker set-up when the HD is connected via Firewire. So obviously there is a connection of some kind occuring. Any ideas? I'm considering trying an external HD by OWC. Maybe that will make a difference?