how to mount a pen driver?

[simply change <adaptit@gmail.com>]

hi! dear all,

i have a debian sarge kernel 2.6.6-1.386 box. now i want to mount my
usb pen driver.
i tried following commands,

mount -t vfat /dev/sda1 /mnt/pen

whats the pen driver device name under /dev/ folder on debian sarge?

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