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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-0x01000019 DIMM VPP1 Undervoltage (Memory, Major Alarm)

ALM-0x01000019 DIMM VPP1 Undervoltage (Memory, Major Alarm)


Alarm message:

CPU arg1 DIMM VPP 1 voltage (arg3 V) is lower than the undervoltage threshold (arg2 V) (BN: arg4).

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 the VPP1 voltage of the DIMM connected to the specified CPU is lower than the undervoltage major threshold.

Alarm object: memory


Alarm ID Alarm Severity Auto Clear





Name Meaning


Socket No. of the CPU.


Current reading of the sensor.


Alarm threshold.


BOM code.

Impact on the System

The server cannot be started or may run improperly.

Possible Causes

The mainboard is faulty.


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

    • If yes, no further action is required.

    • If no, go to 2.

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

Document ID: EDOC1000054724

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