Wojciech Puchar wrote:

> > > than zero.
> >
> > But then several bits would always be zero, and not overwritten
> > alternatingly with zeroes and ones.
> >
> > If you want anything other than ones and zeroes, I'd rather recommend
> > /dev/random.
> /dev/urandom
> 
> using /dev/random will take millenium to wipe whole disk

Considering performance: there's hardly a faster method than a
screwdriver scratching the rotating disk. It looks really nice and you can
make funny noises. Though it does not smell very well. ;-)

-- 
rm -rf *
Don't try this at $HOME !