External drive not mounting with FW800

Hi,
I have a strange problem... I am trying to connect a SATA 3.5" drive (Seagate Barracuda) in a Vantec NexStar enclosure to a MacBook Pro (17"), and the drive will mount (either on the desktop or in Disk Utility) when connected with FW400 and with USB 2.0, but not with FW800 (the enclosure has all three). It will not mount on another 15" MacBook Pro either.
The strange thing is that I CAN connect the drive to my Mac Pro through FW800 with no problems, and also to both a 15" and a 17" PowerBook G4!
Does this sound like a driver problem? Like maybe the driver for the Vantec enclosure is not compatible with the MacBook Pro?
If anyone has a clue what the problem might be, let me know!
Thanks,
Nayeli

The problem turned out to be the FW 800 cables that came with the Vantec enclosure. For some reason they work with my Mac Pro, but not with either the 17" MacBook Pro or the 15" MacBook Pros I tried.

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If your external drive does not have an independent power supply, you may wish to consider a couple of lower-cost options before tossing the drive. Bus-powered drives have no external power source and must get all their power from the computer. They can exceed the computer's USB energy budget.
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If you don't have enough ports to use this, try the next cheapest option:
Newer Technology 7 Port Hi-Speed USB 2.0 Hub with Power Adapter for Mac & PC
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Roderick A. Santiano wrote:
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peacedotnik
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