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FusionServer Pro Rack Server iBMC Alarm Handling 31

This document describes iBMC alarms in terms of the meaning, impact on the system, possible causes, and handling suggestions.

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ALM-0x0000001B CPU IERR Error (CPU, Critical Alarm)

ALM-0x0000001B CPU IERR Error (CPU, Critical Alarm)


Alarm message:

CPU arg1 has an uncorrectable error (SN: arg2, BN: arg3).

From iBMC V316, the CPU and disk alarms will also include the SN and BOM code and the mainboard and memory alarms will also include the BOM code.

This alarm is generated when an uncorrectable error is detected on the CPU.

Alarm object: CPU


Alarm ID Alarm Severity Auto Clear





Name Meaning


Socket No. of the CPU.


CPU serial number.


BOM code.

Impact on the System

The server OS may stop responding or restart.

Possible Causes

  • The CPU is faulty.
  • The mainboard is faulty.


  1. Switch the CPU with a functioning CPU to identify the faulty CPU. Replace the faulty CPU, and then check whether the alarm is cleared.

    • If yes, no further action is required.

    • If no, go to 2

  2. Replace the mainboard. Then, check whether the alarm is cleared.

    • If yes, no further action is required.

    • If no, go to 3.

  3. Contact Huawei technical support.
Updated: 2019-11-19

Document ID: EDOC1000054724

Views: 394150

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