I've got a USB 2.0 hard drive enclosure which came with a cable with 2 plugs on it. I know that this is done so that it can draw more power if necessary.
If the hard drive can't draw enough power with just one of the plugs, does the second plug have to attach to the same computer? Or can I get my power by attaching the second plug directly to a wall-wart?
(Specifically, I am planning to attach this drive to a Raspberry Pi, where power and USB space is limited)