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Configuring and Deconfiguring Processors or Memory
All failures that crash the system with a machine check or check stop, even if intermittent, are reported as
a diagnostic callout for service repair. To prevent the recurrence of intermittent problems and improve the
availability of the system until a scheduled maintenance window, processors and memory DIMMs with a
failure history are marked "bad" to prevent their being configured on subsequent boots. This function is
called repeat gard.
A processor or memory DIMM is marked "bad" under the following circumstances:
v A processor or memory DIMM fails built-in self-test (BIST) or power-on self-test (POST) testing during
boot (as determined by the service processor).
v A processor or memory DIMM causes a machine check or check stop during runtime, and the failure
can be isolated specifically to that processor or memory DIMM (as determined by the processor runtime
diagnostics in the service processor).
v A processor or memory DIMM reaches a threshold of recovered failures that results in a predictive
callout (as determined by the processor run-time diagnostics in the service processor).
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pSeries 610 Model 6C3 and Model 6E3 User's Guide
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