I just added an Adaptec FireWire/IEEE1394 card to my Linux box.
At first, my network interface was disabled because it tried to use FireWire for en0. I was able to fix it easily by simply removing the ieee1394 ethernet module and everything worked fine after that. I connected a Mac formatted FireWire drive, mounted it with ‘mount -t hfsplus /dev/sda’ and it recognized the drive.