Wipe utility

By Wipe utility I mean http://mindprod.com/jgloss/wipe.html

I am trying to find a decent one. I tried the popular 12 ghosts and
it turned out to be almost a Trojan.

I am looking for one that will zero free space or set it to a constant
so that image backup will compress optimally. Ideally it would also
zero out file tails (aka cluster tips), and unused directory entries.

I suppose I could write one in Java that just keeps growing and
zeroing a file until it runs out of space, but that would interfere
with other apps.
--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com
.