What's the matter?

I am a newbie for QNX. Now I wonder how to access USB Flash to read files in QNX 6.3 .
I have read the helpviewer again and again and tried many times with follow commanding:
io-usb -duhci
waitfor /dev/io-usb/io-usb
It looks very well after these.
now input this:
devb -umass &
it reports no mass device.
what’s the matter? anyone can tell me?



when I input this command:
mount /dev/io-usb/io-usb

it shows " mount: Can’t mount / (type qnx4)
mount: Possible reason: No such device or address".

I suspect that mount will need to be used on the resulting /dev/hdX after a successful starting of devb-umass. That is unless it has an automount option in which case mount won’t be needed at all.

Try something like this:
io-usb -dehci -dohci -duhci
devb-umass cam verbose,pnp umass path=/dev/io-usb blk auto=partition