I have an external firewire case with an 80gb 7200rpm drive - my prob is I can run 20, 40 and 60gig 5400rpm drives no problem, but when I stick a 40, 60 or 80gb 7200rpm drive in the damn thing works sometimes if at all, I have tried numerous cables, other drives, operating systems, platforms etc but I still get the same problem.
Sounds to me that the power supply is not up to it. I would expect the
faster drives to be thirstier or maybe they are more demanding of their supply limits,
maybe the power is out of their spec.
Measure the +5 and +12 supplies while they are operating.
Good luck Ross
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