|If you really want to use real dos:-|
a) It is firdt worth checking out the dos command FDISK.
This can be used to remove old and/or setup new partions on your hdd.
I always enable LBA and use fat32 rather than ntfs
b) Then the dos command FORMAT is used.
FORMAT C: /U /C
for help, either enter
If help info greater than one screen, |MORE provides paging. e.g.
HELP FORMAT |MORE
Good luck - Keep us posted.