2488H V5: Memory Initialization Fault and Isolated Rank at DIMM141 J215

Source system and symptom

The customer reports less OS-visible memory than physically installed on a four-socket 2488H V5. The captured identity information is:

SEL excerpt

The source did not find a useful corresponding memory alarm in SEL. That does not invalidate memory faults recorded in other diagnostic logs, nor prove the entire SEL contains no unrelated alerts.

FDM and maintenance evidence

FDM records first/second corrected-error rate warnings and a major Error_Storm fault at DIMM141 J215, with memory-bucket thresholds exceeded.

The maintenance log records repeated CE overflow, FailDimmInfo and rank number 1. A later initialization excerpt records the error code:

Case conclusion and service location

The source explains that BIOS checks memory during reboot and isolates an affected rank when initialization fails, reducing usable memory. It associates 0x301C with this case’s DIMM141 J215 initialization error and recommends replacing that module. The log excerpts span different dates; retain that chronology rather than presenting them as a single simultaneous event.

Correlate the actual machine’s complete logs and supported physical slot map before replacement. Recheck OS/BIOS usable capacity and fault evidence after the approved service workflow. The source provides no completed post-repair test result, so the screenshots are not evidence of a verified repair.