PC disk wipe software

[Mark]

>I thought I'd ask here, since its related to a lot of the stuff people
>have written for the PC platform in these parts. I need to securely
>wipe a bunch of data from an MS-DOS hard drive, so that it can't be
>recovered. Are there any readily available utilities for this? Will
>any of them selectively erase only data that isn't allocated to
>existing files?

Archive data off to tape, low level format drive using the bios hd utils,
reformat drive, restore data. I find the non graphical AMI bios very useful
for this.

Doing anything else fails to remove the old data on partially used but valid
blocks.

Cheers,
Mark