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Resetting the Service Processor
If required, the system is restarted by resetting the service processor. If the system is powered up,
resetting the service processor will cause the system to shut down. When the service processor is reset, it
goes through its power-up sequence, including self-tests. Successful completion of the reset sequence is
indicated by OK on the HMC display.
Before resetting the service processor, if the managed system is powered up and running, shut down all
partitions, or the full system partition. This action causes the system to shutdown and the system power is
turned off.
To reset the service processor when the managed system is powered off, perform either of the following:
If the service processor is responding to input from the HMC, select Service Processor Setup Menu
v
from the main menu, then select Reset Service Processor. This can only be done by a privileged user.
v
Remove, then reapply, power using the HMC.
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 (POSTs) and configuration tasks are
completed.
The pre-standby phase components are:
v Service Processor Initialization - Service processor performs any necessary hardware and software
initialization.
v Service Processor POST - Service processor 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 the
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 virtual operator
panel.
OR
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Eserver pSeries 655 User's Guide
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
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