I've had this G-Technology Triple interface 2.5 inch FW800 enclosure which came with a full height 12.5 mm Hitachi 500 gb drive. Sometime ago I noticed that this drive wouldn't work with bus power and needed an external power supply and having just bought the WD 640 GB low power drive I see the same is true also. It's hard for me to believe that the enclosure could be damaged in such a way that it would only work with an additional power adapter so just how reliable are the Unibody FW800 ports are providing bus power to external 2.5 low power hard drives? I'm wondering if that I'm seeing is a change over time in how well the FW ports provide bus power. Is anybody able to reliably bus power their G-Technology drive over firewire?