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Huawei Rack Server iBMC Alarm Handling 28

This document describes iBMC alarms in terms of the meaning, impact on the system, possible causes, and handling suggestions.
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ALM-0x0142FFFF Below Lower Major Threshold (CPUN DDR VDDQ/CPUN DDR VDDQ2)

ALM-0x0142FFFF Below Lower Major Threshold (CPUN DDR VDDQ/CPUN DDR VDDQ2)

Description

Alarm message:

Below lower major threshold

This alarm is generated when the voltage of the CPUN DDR VDDQ on the mainboard is lower than the major alarm lower threshold.

Sensor triggering the alarm:

  • CPUN DDR VDDQ
  • CPUN DDR VDDQ2

Attribute

Alarm ID Alarm Severity Auto Clear

0x0142FFFF

Major

Yes

Parameters

Name Meaning
N

Serial number of the CPU.

Impact on the System

The server system cannot work properly.

Possible Causes

  • The DIMM is faulty.

  • The mainboard is faulty.

  • The CPU is faulty.

Procedure

  1. Remove the DIMMs connected to the CPU one by one and check whether the alarm is cleared.

    For details about the DIMM layout, see the server user guide.

    Use the Huawei Server Compatibility Checker to obtain information about the mapping between CPUs and DIMMs.

    • If yes, go to 2.

    • If no, go to 3.

  2. Replace the faulty DIMM. Then, check whether the alarm is cleared.

    For details about how to replace the DIMM, see the server user guide.

    • If yes, no further action is required.

    • If no, go to 4.

  3. Replace the mainboard. Check whether the alarm is cleared.

    • If yes, no further action is required.

    • If no, go to 4.

  4. Replace the CPU. Then, check whether the alarm is cleared.

    • If yes, no further action is required.

    • If no, go to 5.

  5. Contact Huawei technical support.
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Updated: 2019-06-04

Document ID: EDOC1000054724

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