i have a older computer so i had to get a interface card (dv home pro by swann) to plug into motherboard (white) to plug fire wire into. the disk shows up on "system information" but not on "my computer". i know it needs to be formatted because the guy i bought it from used it on a mac. the "system info" shows it as a oxford ide "ieee 1394 sbp2 device" there are no jumpers on the external drive. help please!!!