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Why Does the eSPI Reg Access Sensor Report “Unknown” in the Sensor Readings Screen of the Integrated BMC Web Console?

Content Type: Troubleshooting   |   Article ID: 000088833   |   Last Reviewed: 03/11/2026

Environment

Operating System

OS Independent family

Description

eSPI Reg Access sensor is reported as unknown in Sensor Readings screen of Integrated BMC Web Console on Intel® Server Board S2600BP family.

Resolution

To make the sensor function, the BIOS, BMC firmware, and Field Replaceable Unit/Sensor Data Record (FRUSDR) must match with the appropriate Intel® Server Board S2600BP Family BIOS and Firmware Update Package.

  1. Check the versions of BIOS, BMC firmware, and FRUSDR installed on the Intel server system.
  2. Compare them with the appropriate Intel® Server Board S2600BP Family BIOS and Firmware Update Package.
  3. If any version of BIOS, BMC firmware or FRUSDR mismatch is found, update the system with latest Intel® Server Board S2600BP Family BIOS and Firmware Update Package.

Additional information

The sensor eSPI Reg Access for feature Integrated BMC eSPI register access restriction was added starting in S2600BP FRUSDR 1.42.

Related Products

This article applies to 21 products.

Discontinued Products

Intel® Compute Module HNS2600BPQ Intel® Compute Module HNS2600BPS Intel® Compute Module HNS2600BPQ24R Intel® Compute Module HNS2600BPBLC24 Intel® Compute Module HNS2600BPSR Intel® Server Board S2600BPQ Intel® Compute Module HNS2600BPS24 Intel® Compute Module HNS2600BPS24R Intel® Server Board S2600BPBR Intel® Compute Module HNS2600BPBLC Intel® Compute Module HNS2600BPQ24 Intel® Compute Module HNS2600BPB24 Intel® Compute Module HNS2600BPB24R Intel® Compute Module HNS2600BPB Intel® Compute Module HNS2600BPBLC24R Intel® Server Board S2600BPQR Intel® Compute Module HNS2600BPBLCR Intel® Server Board S2600BPS Intel® Server Board S2600BPB Intel® Server Board S2600BPSR Intel® Compute Module HNS2600BPQR