And moved one of them to USB 2.0. This may not be an option but try this.
1. Ask in one of the Cnet Apple forums.
2. Ask a guru at an Apple store.
I need to connect a DVD burner AND an external Hard Drive dasiy chained to my Mac computer OS X 4.1 so that the DVD burn shows up on my desk top? No matter how I switch the firewire cable the Hard Drive shows up but the DVD burner does not.. it is powered on lights and opens the DVD drawer but will not show on my desktop