Replacement of Failed Processors

In Online Activation Mode

If an active processor fails with a Low Priority Machine Check (LPMC), in your iCOD system, its processor capacity is replaced instantly by an inactive processor, if any are available on the system/partition. The failing processor is marked for deconfiguration during the next system reboot.

If an active processor fails with a High Priority Machine Check (HPMC), then upon reboot, the failed processor is deconfigured and its processor capacity is instantly replaced by an inactive processor, if any are available on the system/partition.

	NOTE: In both of the above scenarios the failed processor should be replaced in a timely manner using your normal hardware support process.

Failed Monarch Processors

Monarch processors (see Title not available for a definition) that are failing with a LPMC are not instantly replaced. When a monarch processor experiences a LPMC, the LPMC monitor marks the processor for deconfiguration; however, the LPMC monitor is not be able to deactivate the processor, unless the system is re-booted. Deactivation of a monarch processor is not possible because it is the controlling processor of the operating system (CPU 0). Therefore, an iCOD processor cannot replace a (failing) monarch processor.

If your iCOD system has only one active processor, it is considered a monarch processor, and it cannot be replaced online. A reboot of the system is required to replace the failing monarch processor.

If there are multiple active processors in your iCOD system, one of them is designated as the monarch processor, and the other (non-monarch) processors can be replaced online. If the monarch processor fails, it cannot be replaced without a reboot.

In Offline Activation Mode

An inactive processor, if available in the system/partition, needs to be manually configured before the processor capacity of the failed processor can be replaced.