Originally posted by Toccatexx:
but can I boot off the FW HD? can I boot off a partition on the FW HD to run Linux?
I'm not sure about Linux but you can definitely boot the Mac off of a FW HD. I've done it several times.
You can backup your OS X boot partition to a FW disk with
CCC and then boot from that (just don't forget to tell CCC to bless the partition).
Generally, you select the boot partition in System Preferences > Startup Disk or at boot time if you hold down the alt/opt key while booting. Selected partitions can be on SCSI, ATA, FW or USB busses or on the network via BootP. General rule of thumb: If the system you want to boot from shows up in the system pref panel to chose the boot partition, your Mac will boot from it.
Now Linux is another issue...