How much wiping do you do? :)

[irongeek at irongeek.com (Adrian Crenshaw)]

I sent a simular question to Scott Moulton, but I figured I'd ask in this
gorup as well. I always wondered if wiping with more than just all zeros was
necessary, then I saw this:

http://16systems.com/zero.php
and this
http://www.anti-forensics.com/disk-wiping-one-pass-is-enough

So, is it totally useless to wipe a drive more that once? What would it take
to get the data off of a drive wiped once with all zeros?

Also as a side note, Scott sent me a link to this tool awhile back that uses
some on board stuff of modern drives to wipe even sectors marked as bad by
the internal drive logic:

http://crystalmark.info/download/index-e.html

One more side note: Anyone know how I can wipe my slack space with an
arbitrary set of bits? I though it would be funny to but the lemonparty jpg
all over my slack space for investigators to find :)

Thanks much,
Adrian
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