Intel® ME SMBus Link Error: SmLink1, MUX Address 0xFF in System Event Logs for Intel® Server D50DNP Product Family

You may see the following error logged in the System Event Log (SEL) on an Intel® Server D50DNP system:
Intel ME has detected SMBus link error. Sensor Bus: SmLink1, MUX Address: 0xFF.

The Intel® ME detects an SMBus link error, recorded in the SEL as a critical event with details: Sensor Bus: SmLink1, MUX Address: 0xFF, in Intel® Server D50DNP multinode systems.

This event is informational and does not affect functionality or performance.

If only the SMLink1 assertion is observed, it indicates a temporary unavailability of SMLink1, considered a warning with no impact, requiring no action.

If additional events like SMART/CLST occur simultaneously, or if the SMLink1 timeout persists unusually long, further debugging is necessary.