Anyone with an older mac, who is thinking of adding a hard drive and isn't aware... I have a G4 400 AGP and tried to add a new 120GB IBM hard drive. The new IBM's are ATA 6, which my G4 400 AGP will not recognize. Tom (tech) at OWC says that in order to add a new ATA 6 - I need to use a PCI Card Ultra ATA/133, which adds 2 more hard drives onto the G4. Lynn