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Subject: Re: [gentoo-amd64] Drivers For USB HDD
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On Mon, May 7, 2012 at 10:00 AM, Mark Knecht <markknecht@gmail.com> wrote:
> here are 3 or now I
> think 4 different USB specs - EHCI, OHCI, UHCI, and then whatever USB
> 3.0 is using

XHCI

Furthermore, USB 3.0 has 9-pin ports and cables (for type-A) versus
the 4-pin of USB 1/2. The USB 3.0 sockets are backward-compatible with
older USB devices and cables, but older USB cables are not
forward-compatible with USB 3.0.