Service Processor Operational Phases; Pre-Standby Phase; Standby Phase - IBM RS/6000 44P 270 Service Manual

Service Processor Operational Phases

This section provides a high-level flow of the phases of the service processor.

Pre-Standby Phase

This phase is entered when the server is connected to a power source. The server may
or may not be fully powered on. This phase is exited when the power-on self-tests
(POST) and configuration tasks are completed.
The pre-standby phase components are:
v Service processor initialization - Performs any necessary hardware and software
initializations.
v Service processor POST - Conducts power-on self-tests on its various work and
code areas.
v Service processor unattended start mode checks - To assist fault recovery. If
unattended start mode is set, the service processor automatically reboots the server.
The service processor does not wait for user input or power-on command, but moves
through the phase and into the bring-up phase. Access SMS menus or service
processor menus to reset the unattended start mode.

Standby Phase

The standby phase can be reached in either of two ways:
v With the server off and power connected (the normal path), recognized by OK in the
LCD display.
v OR
v With the server on after an operating system fault, recognized by STBY or an 8-digit
code in the LCD display.
In the standby phase, the service processor takes care of some automatic duties and is
available for menu operation. The service processor remains in the standby phase until
a power-on request is detected.
The standby phase components are as follows:
v Modem configuration
Chapter 7. Using the Service Processor
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