This is what HP says about DriveLock
DriveLock hard drive protection
DriveLock does not require the user to remember another password. DriveLock integrates with poweron
password, and if both are the same, the user is required to enter only a single password in order
to unlock the system as well as the hard drive.
The DriveLock password is stored inside the hard drive itself, and cannot be read; it can only be
authenticated against. In practical terms, this means that an unauthorized user does not have any
means to read the DriveLock password stored on a hard drive. In order to unlock the hard drive, the
correct password has to be entered.
A hard drive protected with a drive lock password stays protected even if removed from one system
and inserted into another.
DriveLock can be enabled in BIOS setup by selecting DriveLock Passwords from the Security menu.
This will prompt the user to create a master password and a user password before enabling
Most people just replace the disk with another hard disk.