Could someone shed some light on this? I have a seagate goflex drive that is turning itself on and off under XP - it won't even stay on long enough to recognize the drive.

My first guess was a power problem - maybe it trying to draw more than the port can supply.
My second guess is something windows is doing - it seems to run until Windows finishes loading, and then the cycling starts. Yet it worked fine for a long time, and nothing else has changed.
There is nothing wrong with the drive, and other devices work fine in that port.
Very puzzling!