Delete will work but that is not really wiping just smudging.
You want to use tools for your host...

Just write zeros on it.. Then its real clean.

I have decided to create a new 2GB hard disk from scratch.
bximage
then
imgmount x x:\dos.img -size 512,63,16,4093

The mounting was successful,but
I couldn't copy files into it, why was that? (Unable to format it)
Thanks
Jack

Fdisk and format. There is a guide in the guides section.

You know this thread would have gone differently if you had written you want to wipe a mounted hard drive image....

Okay, thanks, just forgot there is fdisk.exe, let's close this thread...

Isn't Imgmake superior to bximage precisely because it does not require all this extra formatting?
Patch: Imgmake - creates floppy or harddisk images