On Tue, Aug 14, 2007 at 10:23:27AM -0400, Alan Stern wrote:
> > The other external disk (also claimed to be full speed) seems to achieve
> > transfer speeds of 20-30 KB which seems OK.
>
> If 400 KB/s is bad, how come 20-30 KB/s is OK?
He probably means 20-30 M byte/sec.
Some motherboards, when USB 2.0 was still kind of new, have a few
USB 2.0 (high speed, 480 Mbps) ports, and some usb 1.1 (full speeed,
12Mbps)
To prevent confusion among consumers, the USB comittee decided that
these USB 1.1 ports should also be called USB 2.0 ports, as they
conform to the slower speed part of the USB 2.0 spec. I prefer to
call them USB 1.1 ports.
The fact that not "EHCI" but "UHCI" is driving one of your ports
is a strong hint that it is a "max 12Mbps port".
Try a different connector on your computer.
Roger.
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