find logical drives in Extended Partition.
if not there, means that the drive must have been installed with linux before,
make any one primary drive, make it active
then format is with normal process.
again enter fdisk
and delete in order:
Logical drives in extended partition
exit, restart PC, and again enter Fdisk
and do what ever u want
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"