I've got a 3 TB WD MyBook Live, which should consume about 5 W in standby and about 10 W in "running" mode, according to what I've found on the web. However, my device consumes nearly 10 W in standby and 14 to 17 W otherwise. Is it possible to reduce the power consumption? What wattage do your devices have?
I'm a bit disappointed, even my PC (ASRock ION 3D) needs less power :-/