file-spec

    The file specification of a system parameter file from which
    data is to be retrieved. You can use the SYSGEN command WRITE to
    create the parameter file. The default file type is .PAR.

    In place of a file specification, you can specify one of the
    following keywords:

 CURRENT

    Specifies that source information is to be retrieved from the
    current system parameter file on disk.

    On Alpha systems, the system parameter file is
    SYS$SYSTEM:ALPHAVMSSYS.PAR.

    On Integrity servers, the system parameter file is
    SYS$SYSTEM:IA64VMSSYS.PAR.

 ACTIVE

    Specifies that source information is to be retrieved from the
    active system in memory.

 DEFAULT

    Specifies that source information is to be retrieved from the
    default list. The USE DEFAULT command initializes the SYSGEN
    work area with parameter values that are built into SYSGEN;
    these values allow the operating system to boot on any standard
    configuration.

    To avoid starting all layered products on a system that is not
    tuned for them, possibly causing the system to hang, set the
    STARTUP_P1 system parameter as follows:

    SYSGEN> SET STARTUP_P1 "MIN"