The Urban Legend of Multipass Hard Disk Overwrite

It is "known" that to securely delete the data from the disk you need to write the data over the deleted blocks several times (different sources say from 3 to 35 times). But is this true?


The Urban Legend of Multipass Hard Disk Overwrite article will tell you what the state of things is as of now (well, of '2011).


The overall conclusion, I think, is "if you are paranoid, physical destruction of the disks is recommended".