On Monday 02 May 2011 23:17:05 Mark Knecht wrote: > OK, so I guess obviously the USB port must supply some amount power or > even a simple flash drive wouldn't work as the memory in it has to > require some sort of +/- supplies to function at all. > In terms of my external USB hard drive, I have 3 like the following > link except mine are 500GB. > http://www.amazon.com/Buffalo-Technology-DriveStation-External-HD-CX500U2/d > p/B002IYDEMW > This drive ships with an external wall wart power supply and doesn't > function without it on any machine I've plugged it into. Yep, that device will not work when used only on usb-power. The 3.5" disks need 12V, which the usb doesn't provide. What I have here and what works with one connector on my laptops and needs two on my desktops is a case for a 2.5" disk. (The disk I got from my brothers old laptop.) Have fun, Arnold
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