IBM H Series Installation And Service Manual page 382

Follow-up to a Failed Boot Attempt
The Service Processor will initiate a power-on sequence upon detection of a
failed boot attempt.
Service Processor Reboot/Restart Recovery
Reboot describes bringing the system hardware back up from scratch, for example,
from a system reset or power on. The boot process ends when control passes to the
operating system process.
Restart describes activating the operating system after the system hardware reinitial-
ized. Restart must follow a successful reboot.
Failure During Boot Process:
system power-on or upon reboot after a system failure, the Service Processor (SP)
monitors the boot progress (via surveillance). If progress stops, the Service
Processor can reinitiate the boot process (reboot) if enabled to do so. The Service
Processor can re-attempt this process according to an entry on the Reboot/Restart
Policy Setup Menu.
Failure During Normal System Operation:
and control transferers to the operating system (OS), the Service Processor can
monitor operating system activity (see the SERVICE PROCESSOR SETUP MENU
item Set Surveillance Parameters). If OS activity stops, the Service Processor can
initiate a reboot/restart process based on the settings in the Service Processor
Reboot/Restart Policy Setup Menu and the OS automatic restart settings (see OS
documentation).
If the operating system is AIX, the menu item under SMIT for setting the restart
policy is Automatically Reboot After Crash (True/False), and the default is False.
When the setting is True, and if the SP parameter, Use OS-Defined Restart Policy, is
Yes (the default), the Service Processor takes over for AIX to reboot/restart after a
Check Stop or Surveillance failure.
Service Processor Reboot/Restart Policy Controls:
automatic restart policy (see operating system documentation) indicates the OS
response to a system crash. The SP can be instructed to refer to that policy, or not,
by the Use OS-Defined Restart Policy menu item.
If the operating system has no automatic restart policy, or if it is disabled, then the
Service Processor restart policy can be controlled from the Service Processor Menus
by using the Enable Supplemental Restart Policy selection.
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RS/6000 Enterprise Server Model H Series Installation and Service Guide
During the boot process, either initially after
When the boot process completes
The operating system's