(Alpha only) MC_SERVICES_P2 specifies whether to load the
    PMDRIVER (PMA0) MEMORY CHANNEL cluster port driver.

    PMDRIVER is a driver that serves as the MEMORY CHANNEL cluster
    port driver. It works together with MCDRIVER (the MEMORY CHANNEL
    device driver and driver interface) to provide MEMORY CHANNEL
    clustering. If PMDRIVER is not loaded, cluster connections are
    not made over the MEMORY CHANNEL interconnect.

    The default value is 1, which causes PMDRIVER to be loaded when
    you boot the system. When you run CLUSTER_CONFIG.COM and select
    the MEMORY CHANNEL option, PMDRIVER is loaded automatically when
    you reboot the system.

    VSI recommends that this value not be changed. This parameter
    value must be the same on all nodes connected by MEMORY CHANNEL.