> Do I need to write a device driver for such a device or can I mount it and
> simply use the "open" "read" "write" command to send commands back and
> forth? If yes how do I find where the it is mounted (/dev/??)?


You detail is a little thin but.... Possibly/probably, have you looked 
at the drivers/usb/storage directory? You may find drivers already for 
it. If you've got the API documentation then life is a little easier. 
Checkout /proc/bus/usb/devices and see if you've got a unknown device 
attached - Ie. see if the USB bus thinks it's plugged in.

> My machine didn't have USB ports so I bought a 2-port PCI card. Is there
> anything different in the way the system configure or maps USB if there is a
> PCI card verses a USB built on the board? It shows up as a Hub right now.

Not that I'm aware of. I assume the kernel is recognising the PCI card 
and loading the appropriate USB drivers?


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