East-Tec Disk Sanitizer

[Dale Beams]

*Q:* /Which wipe method should I use?/

*A:* If your disks are likely to be investigated with hardware recovery 
tools, you should use one of the following wipe methods: "U.S. 
Department of Defense Sanitizing (DOD 5220.22-M)" or "Gutmann's maximum 
security sanitize method". These methods are very secure, they can stop 
both software and hardware recovery tools, but they are very slow.

http://www.east-tec.com/dsksanit/faq.htm