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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 invoked. This is to
give the POST an opportunity to locate and report any problems that may otherwise be
untested. For more information on IPL speed, refer to "Values for IPL Types and
Speeds" on page 206.
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 Service Processor
Setup Menu item Set Surveillance Parameters). 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 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), Service Processor takes over for AIX to reboot/restart after a
hardware or surveillance failure.
Chapter 3. Service Processor Menus
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