The SAVPARAMS phase records feedback in the file
    AGEN$FEEDBACK.DAT, which can be used in subsequent AUTOGEN
    phases. If you specify NOFEEDBACK as the execution-mode
    parameter, the information collected is not used.

    The SAVPARAMS phase is valid as a start phase and end phase.
    SAVPARAMS requires the SYSPRV and CMKRNL privileges.

                                   NOTE

       You can specify the SAVE_FEEDBACK option during an
       interactive orderly shutdown with SYS$SYSTEM:SHUTDOWN.COM.
       Entering this option in response to the prompt "Shutdown
       options:" records feedback collected since the system was
       last booted. Using the SAVE_FEEDBACK option creates a new
       version of SYS$SYSTEM:AGEN$FEEDBACK.DAT. Run AUTOGEN from
       the GETDATA phase after the system reboots to use this new
       version of the feedback.