DBAN
"Darik's Boot and Nuke ("DBAN") is a self-contained boot floppy that securely wipes the hard disks of most computers. DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction." More...

Vladville Articles
"I firmly believe that a problem should be solved exactly once and I hope that by documenting my solution I can save you some time and my own in the future when I forget how I did things in the first place." More...