The 'Disk Encryption' function provides a randomly generated encryption key used to
encrypt all data stored on the hard disk. This key generated by each printer is unique
to that specific printer.
With 'Printing Lockout' a disk may also be locked with a user PIN. This prevents any
submitted jobs from printing. All held jobs are stored on the hard disk until it is
unlocked. 'Disk Encryption' should be used with this setting.