firewire used to have superior data transfer speed and protects
the data in complete buffers/ packets in the event of a power
failure prior to hardware power off. Just as the SCSI concept with
HDD in Apple computers, Firewire was a popular data transfer
concept with Apple computers too. Now that USB has reached a higher
speed and offers the convenience of plug-N-play, it is a form of
data transfer not to be missed espeically since it compliments a
self-powered cable.
Refering to your S9000 printer's quick start user guide page 2, the
USB cable calls for a Canon or other computer manufacturer cable
(not that strict, not even asking for specific cable packed with
tthe printer or any that has a capacitor in it) up to 2 meters in
length. So you may want to cross- reference this info withh
whatever hardware you have and are using with the printer
now.
If you still have problems and the printer's still covered under
warranty you may want to call up Canon Tech support?
