Comment 5 for bug 74426

I had the same problem with Feisty.
But I found a workaround:

As Superuser I typed:
   rmmod sbp2
   modprobe sbp2
This had no effect at all. Than I tried:
   rmmod ohci1394
   modprobe ohci1394
Suddenly my firewire disk was recognized and the gnome
volume manager happily created all the icons for every partition on
that disk. After umounting them I tried to unplug and
replug the disk: now everything worked normally.
Side note: On my previous notebook (a Dell Inspiron 8000
with P III, on which I was running Debian 3.1 sarge until the
display cable broke), firewire was never an issue. Mysterious.