this phase includes the tasks that the service processor performs during steady-state execution of the operating system.

    1 environmental monitoring

    the service processor monitors voltages, temperatures, and fan speeds (on some servers).

    2 responding to system processor commands

    the service processor responds to any command issued by the system processor.

    3 run-time surveillance (not supported on partitioned systems)

    if the device driver is installed and surveillance enabled, the service processor monitors the system heartbeat. if the heartbeat times out, the service processor places an outgoing call. this is different from the bring-up phase scenario, where the specified number of reboot attempts are made before placing an outgoing call.

    4 hmc surveillance

    on an hmc-managed system, the service processor monitors the communication link between the managed system and the hmc. if the service processor detects that this communication link has been broken, it will post an error to the operating system running on the managed system.