[netsharc]

Don't HDD's come with encryption per default nowadays? I.e. the 1's and 0's on the platter go through a layer of decryption that happens on the logic board of disk, before it travels through the SATA cable. And vice-versa when writing.

There's an ATA command to protect the encryption key with a password (and you'll be asked on boot for the password), but if the password isn't set, there's still an encryption key. Just make that irretrievable and the information is theoretically irretrievable.

But yeah, funny how superstitions still control the world and people still say "The HDD needs to be shredded so we're absolutely sure!"