Re: [Trisquel-users] Free Software to Securely Erase a Hard Drive

[andrew]

If it is for HDD disposal a friend who works in the software end of  
electronics design for military and security customers uses a BBQ and doesn't  
stand downwind of it while it's cooking. YMMV but drive firmware is so  
sophisticated these days it's hard to be certain of software tools unless you  
started out with full disk encryption.