Use a hard disk to buffer print jobs collate large jobs or to store forms fonts or macros.Features- These key functions are enabled when an optional hard disk is installed:Job Building Printer lockout storage used by Application Solutions such as FormsMerge Job Buffering (print spooling) email spooling font and macro storage User-based billing Job Park (through a power-off and power-on cycle) hard disk-related administration (Disk wiping Disk encryption Disk diagnostics).- 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.