IBM 6H0, Service Manual

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Service Processor Operational Phases
This section provides a high-level flow of the phases of the service processor.
SP Power Applied
Pre-Standby Phase
Standby Phase SP Menus Available
Bring-Up Phase SMS Menus Available
Run-time Phase Operating System Login Prompt Available
Pre-Standby Phase
This phase is entered when the server is first connected to a power source. This phase
is exited when the power-on self-test (POST) and configuration tasks are completed.
The pre-standby phase components are:
v Service processor initialization - the service processor performs any necessary
hardware and firmware initializations.
v
Service processor POST - the service processor conducts power-on self-tests on its
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 a power-on command, but
moves through the phase and into the bring-up phase. Access the system
management services (SMS) menus or the service processor menus to reset the
unattended start mode.
Standby Phase
The standby phase can be reached in either of the following ways:
v
With the server off and power connected (the normal path), recognized by
OK
in the
LCD display.
OR
v With the server on after an operating system fault, recognized by an 8-digit code in
the LCD display.
In the standby phase, the service processor takes care of some automatic duties and
its menus are available. The service processor remains in the standby phase until a
power-on request is detected.
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Service Guide