How to Erase a Hard Disk so data is not recoverable....

1. Use the Hard drive for target practice, misses do not count!!

2. Take apart the hard drive and trash the platters

3. Drop the hard drive off a 10 story building on to cement pavement road
(Do not hit cars or people...that does not count!)

4. (My Favorite!) Use a TV de-gousing Ring (commerical grade!)
and de-gouse or de-maginetise the hard drive.