Library /sys$common/syshlp/sysmanhelp.hlb SHUTDOWN, NODE, Qualifiers, /DISABLE_AUTOSTART  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies the number of minutes before shutdown when autostart
    queues running on the node are marked stop pending and are
    subject to failover to another node.

    Using this qualifier gives you control over when the autostart
    failover process begins. By default, the value equals that of the
    /MINUTES_TO_SHUTDOWN qualifier.

    Determine the appropriate number of minutes for your
    configuration by weighing a smoother transition against
    completing a maximum number of jobs before shutdown. The larger
    the value, the smoother the transition will be. The smaller the
    value, the more jobs will execute on the node.