"F. George McDuffee" wrote in
message ...

you might also find this useful
http://tinyurl.com/l3p5ftk
Unka' George

5V-only laptop IDE drives can draw up to an Amp while USB2 ports are
limited to 500mA. I've found that my SATA laptop drives usually draw
less than the 900mA limit of a USB3 port. My 2TB WD My Passport Ultra
portable external drive idles at only 0.22A. I've recorded 1.7A peak
to a Crucial M500 SSD.

-jsw