It also uses the hardware error detection logic in the processor to capture run-timerecoverable and irrecoverable error indications. The firmware uses the error signaturesin the hardware to analyze and isolate the error to a specific processor.The processors that are deconfigured remain off-line for subsequent reboots until thefaulty processor hardware is replaced.This function allows users to manually deconfigure or re-enable a previouslydeconfigured processor through the Service Processor menu. The user can also enableor disable this function through the Service Processor.Processor Run-Time Deconfiguration (CPU-Gard)Processor run-time deconfiguration allows for the dynamic removal of CPUs from thesystem configuration. The objective is to minimize system failures or data integrityexposures due to a faulty processor. The processor to be removed is the one that hasexperienced repeated run-time recoverable internal errors (over a predefined threshold).The function uses the hardware error detection logic in the processor to capturerun-time recoverable error indications. The firmware uses the error signatures in thehardware to analyze and isolate the error to a specific CPU. The firmware alsomaintains error-threshold information.When an internal recoverable error for a processor reaches a predefined threshold, thefirmware notifies the AIX operating system. The AIX operating system migrates allsoftware processes and interrupts to another processor and puts the faulty processor instop state.CPUs that are deconfigured at run time remain off-line for subsequent reboots throughthe CPU Boot Time Deconfiguration function, until the faulty CPU hardware is replaced.The user can also enable or disable this function through the AIX system managementfunction.Memory Boot-Time Deconfiguration (Memory Repeat-Gard)Memory boot time deconfiguration allows for the removal of a memory segment orDIMM from the system configuration at boot time. The objective is to minimize systemfailures or data integrity exposure due to faulty memory hardware. The hardwareresource(s) to be removed are the ones that experienced the following failures:v A boot-time test failure.v Run-time recoverable errors over threshold prior to the current boot phase.v Run-time irrecoverable errors prior to the current boot phase.This function uses firmware Power-On Self-Test (POST) to discover and isolate memoryhardware failures during boot time. It also uses the hardware error detection logic in thememory controller to capture run-time recoverable and irrecoverable error indications.The firmware uses the error signatures in the hardware to analyze and isolate the errorto the specific memory segment or DIMM.64 User’s Guide
