Slooooow USB key speeds

[Linuxguy123]

On Wed, 2009-01-28 at 18:32 -0600, Michael Cronenworth wrote:
> Rick Stevens wrote:
> > A lot of machines have several USB controllers--some USB 1.1 and some
> > USB 2.0.  If you happen to plug the key into one of the 1.1 ports, it'll
> > be quite a bit slower than the 2.0 ports.
> >
> > Plug the key into one of your ports, then do "lsusb".  In that listing,
> > you'll see lines with "Device: 001".  Those are the "hubs" and they'll
> > tell you if it's a V1.1 or V2.0 bus.
> >
> > You should also see your key.  If it's on a V1.1 bus, try moving it to
> > another port to get it on a V2.0 bus.  For example, here's one of mine:
> >
> > [root at bigdog ~]# lsusb
> > Bus 001 Device 002: ID 2040:6513 Hauppauge WinTV HVR-980
> > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> > Bus 002 Device 002: ID 413c:3200 Dell Computer Corp. MouseBus 001 
> > Device 001:
> > Bus 002 Device 003: ID 413c:2105 Dell Computer Corp.
> > Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> >
> > Note that that device "Bus 001 Device 001" is a 2.0 hub, "Bus 002 
> > Device 001" is a 1.1 hub.  You'll also notice that my USB TV tuner 
> > card is on
> > bus 001 (the 2.0 bus), and my keyboard and mouse are on bus 002 (the 1.1
> > bus).
> >
> > Also note that all three devices are plugged into the back of my
> > machine.  The two USB ports next to the PCI bus slots are the 1.1 ports,
> > while the ports next to my sound card jacks are the 2.0 ports.  The two
> > ports on the front panel (connected to the mobo by a cable) also seem
> > to be 2.0 ports (bus 001).
> 
> Your lsusb output is not telling you what you think. Any new computer, 
> and especially the P5Q-E the OP is using, have all 2.0 ports. The 
> mixture days are over.
> 
> OP, I have a P5Q Deluxe running several USB flash drives at full 2.0 
> speeds. I'd make sure your BIOS USB setting is set to "HiSpeed" and not 
> "FullSpeed." Isn't that wording wonderful?

He already said that the copy was fast under Windows.  Therefore the
BIOS has little to do with this situation.

I too have experienced very slow USB transferspeeds when using a Compact
Flash memory card reader.  I think this situation warrants further
investigation. 


>