root@PartedMagic:~# hdparm --user-master m --security-unlock jelszo /dev/sda
security_password="jelszo"
/dev/sda:
Issuing SECURITY_UNLOCK command, password="jelszo", user=master
SECURITY_UNLOCK: Input/output error
root@PartedMagic:~# hdparm --user-master m --security-unlock jelszo /dev/sda
security_password="jelszo"
/dev/sda:
Issuing SECURITY_UNLOCK command, password="jelszo", user=master
SECURITY_UNLOCK: Input/output error