IBM xSeries 260, User Manual

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Follow-up to a Failed Boot Attempt
The Service Processor initiates 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
reinitialized. Restart must follow a successful reboot.
Failure During Boot Process:
During the boot process, either initially after
system power-on or upon reboot after a system failure, the Service Processor
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:
When the boot process completes
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 Service Processor 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:
The operating system's
automatic restart policy (see operating system documentation) indicates the OS
response to a system crash. The Service Processor 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.
Appendix C. Service Processor Information
C-29