IBM H80 Series manual Service Processor Reboot/Restart Recovery, Boot, Speed, System

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.

Restartdescribes 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