Ubuntu ata secure erase
BIOS ATA Erase Drive
Use the drives inbuilt BIOS function to securely erase it.
- Need BIOS setting IDE mode set to AHCI to hot plug
Example - Erase secondary drive /dev/sdb
HOT PLUG the target drive once Ubuntu is loaded so it isn't 'frozen'
1234 is the password but can be anything, don't use NULL !
sudo hdparm --security-set-pass 1234 /dev/sdb sudo hdparm --security-erase 1234 /dev/sdb
then shutdown/reboot or unplug it - password will have been removed at end of erase.