How do I determine which DIMM has triggered the fault LED on a UCS B-Series Blade Server?

Introduction

This document describes how to use the DIAG SW switch on a Cisco UCS B-Series Blade Server in order to determine which DIMM has triggered the front panel fault LED.

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Q. How do I determine which DIMM has triggered the fault LED on a UCS B-Series Blade Server?

A. Complete these steps in order to use the DIAG SW switch to determine which DIMM has triggered the front panel fault LED on a UCS B-Series Blade Server:

1. View the fault indicator LED on the front panel of the server in order to verify a fault exists on the system.

   

2. View the logs. This example shows a DIMM issue:

   Server 1/6:
   Array 1:
   DIMM Location Presence Overall Status Type Capacity (MB) Clock
   ---- ---------- ---------------- ------------------------ ------------ ------------- -----
   1 DIMM_A1 Equipped Operable Other 8192 1067
   2 DIMM_A2 Equipped Operable Other 8192 1067
   3 DIMM_B1 Equipped Operable Other 8192 1067
   4 DIMM_B2 Equipped Operable Other 8192 1067
   5 Equipped Operable Undisc Unknown Unknown
   6 DIMM_C2 Equipped Operable Other 8192 1067
   7 DIMM_D1 Equipped Operable Other 8192 1067
   8 DIMM_D2 Equipped Operable Other 8192 1067
   9 DIMM_E1 Equipped Operable Other 8192 1067
   10 DIMM_E2 Equipped Operable Other 8192 1067
   11 DIMM_F1 Equipped Operable Other 8192 1067
   12 DIMM_F2 Equipped Operable Other 8192 1067

3. Remove the server and cover.

4. Locate the DIAG SW switch on the motherboard.

   Note: The DIAG SW switches might be different between servers.

5. Press the DIAG SW button.

   

6. Locate the faulty DIMM.

   The faulty DIMM is identified with a red LED.

   

Related Information

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