Commands to access unbuffered device on Linux ARM board.

Hello friends,

Does anybody have idea of how to access unbuffered device in Linux ARM board. I have successfully accessed buffered memory device (pen drive) on that board. When I try to access that device processor identifies the device but didn’t give any path for that unbuffered device as it gives for Pen drive (for ex. sda1).

How can I access that device? I am totally new to hardware side programming. I am also new to Linux ARM.

Please give me clue so that I can finish it my task as soon as possible.

waiting for your reply.

Thanks in advance.