speed problem

[vijirin]

hi all,
I tried to take a dd image of 1 gb usb pen drive in redhat EL4 it took abt 2 mts, i tried the same in debian also, installed in the same machine. it also took abt 2 mts.. but when i tried to take the dd image in knoppix it took nearly about 16mts... Why is this??? is it because dma is not enabled in knoppix... then how could i enbale this for usb devices. when i give the cheatcode knoppix dma it enables the dma for harddisk only.

How could i increase the speed.??????????

plz help

Viji.R

[OErjan]

my guess is that your USB chipset is not working as USB2 but as USB1.1.
tre the command below in a konsole.
sudo modprobe ehci

[vijirin]

when i type the command i am getting the following error

'FATAL: Module ehci not found."

plz help

[vijirin]

ok when i gave
modprobe ehci-hcd
it worked
thanx a lot

regards viji