offline-NPU-fault-diagnosis

To diagnose NPU offline faults from server logs, cross-correlate iBMC, OS Messages, and InfoCollect data using a Step 0 to Step 4 workflow to reconstruct fault timelines, trace conduction paths, and locate hardware coordinates for a defensible root-cause report.

An NPU drops offline due to PCIe link issues, memory errors, or firmware failures. Identifying root causes requires cross-correlating iBMC, OS Messages, and InfoCollect logs to validate multi-source evidence across the fault timeline.

The best way to cross-correlate iBMC and OS logs for PCIe link issues is using a stepwise diagnostic workflow that enforces strict sequencing and multi-source evidence validation to locate the exact NPU ID and PCIe Slot.

Diagnosing NPU memory errors using only InfoCollect data is insufficient. A defensible root-cause report requires cross-correlating InfoCollect with iBMC and OS Messages to enforce strict sequencing and multi-source evidence validation.

To troubleshoot server firmware failures, you need to prepare a log bundle containing iBMC, OS Messages, and InfoCollect data. Providing the path to this bundle initiates the stepwise offline NPU fault diagnosis.