format disk drive

[Dabin Wang]

I first installed Windows98, and then Redhat Linux 7.

Now it is different for me delete the partition for linux and recover 
the space to FAT32.
When I use Linux CD to boot at rescue mode, I can not have any option 
for partition of disk.

When I login as su (root), I can not find fdisk.

Now I want reformat the entire drive (and reinstal window XP). Any one 
know how to do it?

Thanks

Dave