if it and ide drive and does not have an os on it. you need to use windows disk management.
www.youtube.com/watchP8H77-I BIOS 0809?v=wzXoqZTxl_Q
do it if is smaller then 2g as fat32 drive.
if it going to have an os you need to boot off the windows 7 cd and let it make the partion on the os drive.
with an ide drive master (drive c
has to be on ide port 0 not 1. if it a sata drive make sure you have the drive on an intel port and the bios set to achi mode.