(Alpha and Integrity servers) The system suppresses mount
    verification start and end messages for fibre channel disk
    devices if mount verification completes on the first attempt
    and if mount verification does not occur too often. MVSUPMSG_NUM
    and this parameter establish this limit.

    The system issues a mount verification message after a sequence
    of MVSUPMSG_NUM mount verifications have gone unannounced on a
    specific fibre channel disk device within a span of MVSUPMSG_
    INTVL seconds.

    If this parameter is zero, all mount verification messages are
    announced.

    MVSUPMSG_INTVL is a DYNAMIC parameter.