> The goal of this program is not to stop any freak with special
> controller or oscilloscope - 3 times with random data might be
> enough here - but to raise time needed to restore data or
> make it too expensive for government authorities (at least
> if you're not involved in serious crime).

IMHO if one needs more than 3 times with random data, then
he just should use something like cgd and do not allow
unencrypted data to touch magnetic media at all.