Service Processor Reboot/Restart Recovery

Reboot

describes bringing the system hardware back up; 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 is
reinitialized. Restart must follow a successful reboot.
Boot (IPL) Speed
When the server enters reboot recovery, slow IPL is automatically started, which
gives the POST an opportunity to locate and report any problems that may otherwise
be untested.
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. 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 the number of retries
selected in the Reboot/Restart Policy Setup Menu.
Failure During Normal System Operation
When the boot process completes and control transfers to the operating system
(OS), the service processor can monitor operating system activity (see the Set
Surveillance Parameters option in the SERVICE PROCESSOR SETUP MENU). If
OS activity stops due to a hardware- or software-induced failure, 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 the operating system documentation).
If you are using the AIX operating system, the menu item under SMIT for setting the
restart policy is Automatically Reboot After Crash (True/False). The default is False.
When the setting is True, and if the service processor parameter "Use OS-Defined
Restart Policy" is Yes (the default), Service Processor takes over for AIX to
reboot/restart after a hardware or surveillance failure.
64 RS/6000 Enterprise Server Model H80 Series User's Guide