Service Processor Reboot/Restart RecoveryReboot describes bringing the system hardware back up; for example, from a systemreset or power-on. The boot process ends when control passes to the operating systemprocess.Restart describes activating the operating system after the system hardware isreinitialized. Restart must follow a successful reboot.Boot (IPL) SpeedWhen the server enters reboot recovery, slow IPL is automatically started, which givesthe POST an opportunity to locate and report any problems that may otherwise beuntested.Failure During Boot ProcessDuring the boot process, either initially after system power-on or upon reboot after asystem failure, the Service Processor monitors the boot progress. If progress stops, theService Processor can reinitiate the boot process (reboot) if enabled to do so. TheService Processor can re-attempt this process according to the number of retriesselected in the Reboot/Restart Policy Setup Menu.Failure During Normal System OperationWhen the boot process completes and control transfers to the operating system (OS),the service processor can monitor operating system activity (see the Set SurveillanceParameters option in the SERVICE PROCESSOR SETUP MENU). If OS activity stopsdue to a hardware-or software-induced failure, the service processor can initiate areboot/restart process based on the settings in the Service Processor Reboot/RestartPolicy Setup Menu and the OS automatic restart settings (see the operating systemdocumentation).If you are using the AIX operating system, the menu item under SMIT for setting therestart 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-DefinedRestart Policy″ is Yes (the default), Service Processor takes over for AIX toreboot/restart after a hardware or surveillance failure.Service Processor Reboot/Restart Policy ControlsThe operating system’s automatic restart policy (see operating system documentation)indicates the operating system response to a system crash. The service processor canbe instructed to refer to that policy by the Use OS-Defined Restart Policy setup menu.Processor Boot-Time Deconfiguration (CPU Repeat-Gard)Processor boot time deconfiguration allows for the removal of processors from thesystem configuration at boot time. The objective is to minimize system failure or dataintegrity exposure due to a faulty processor.This function uses processor hardware Built-In Self-Test (BIST) and firmware Power-OnSelf-Test (POST) to discover and isolate processor hardware failures during boot time.Chapter 3. Using the Service Processor 63
