Just in case someone is finding this old post like i did.
the little b vs the big B makes a big difference when it comes to information data.
a little b stands for bits
a big B stands for Bytes
the firewire described above is in Megabits per second (Mb/sec)
the harddrives should be described in MegaBytes per second (MB/sec)
there are 8bits to each 1Byte
so a 400 Mb/sec firewire connection is in fact only 60MB/sec
not nearly the 150MB/sec that an SATA1 harddrive can transfer at.
The advice in the previous posts is very incorrect. A firewire connection is a big bottleneck for an SATA drive.