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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-0x2800FFFF Sensor Access Degraded or Unavailable (Mngmnt Health, RearDiskN Temp)

ALM-0x2800FFFF Sensor Access Degraded or Unavailable (Mngmnt Health, RearDiskN Temp)

Description

Alarm message:

Sensor access degraded or unavailable, Sensor is RearDiskN Temp.

This alarm is generated when the server failed to obtain data from the RearDiskN Temp sensor.

Sensor triggering the alarm: Mngmnt Health

Attribute

Alarm ID Alarm Severity Auto Clear

0x2800FFFF

Minor

Yes

Parameters

Name Meaning
RearDiskN Temp

Temperature sensor of the backplane of rear hard disks.

N indicates the serial number of the rear hard disk backplane.

Impact on the System

The detection point temperature of the specified rear hard disk backplane cannot be properly monitored, and an alarm cannot be reported in a timely manner when the temperature is not within the normal range.

Possible Causes

  • The iBMC is not functioning.

  • The cable connecting the mainboard and the component holding the sensor is faulty.

  • The component holding the sensor is faulty.

  • The mainboard is faulty.

The location of the RearDiskN Temp sensor varies depending on the server model. For details, see the user guide of the server you use.

The RH2288H V3 server is used as an example to describe how to clear the alarm. The RearDisk1 Temp is located on rear hard disk backplane 1, and the RearDisk2 Temp sensor is on rear hard disk backplane 2 of the RH2288H V3 server. Figure 3-3 shows the location of the rear hard disk backplanes.
Figure 3-3 Location of rear hard disk backplanes on the RH2288H V3

Procedure

  1. Log in to the iBMC WebUI or CLI.

    For details, see the iBMC user guide of the server.

  2. Restart the iBMC.

    • To restart the iBMC on the WebUI, click Restart iBMC on the Upgrade Firmware page.
    • To restart the iBMC on the CLI, run the ipmcset -d reset command.

  3. After the iBMC starts, check whether the alarm is cleared.

    • If yes, no further action is required.

    • If no, go to 4.

  4. Power off the server, remove and reconnect the power cables, and power on the server. Check whether the alarm is cleared.

    • If yes, no further action is required.

    • If no, go to 5.

  5. Remove and reconnect the cable between the component holding the sensor and the mainboard. Then, check whether the alarm is cleared.

    For details about the location of the sensor, see the sensor list in the server user guide.

    In this example, remove and reconnect the signal cable between the mainboard and the rear hard disk backplane, and the signal cable between the front and rear hard disk backplanes. For details, see "Internal Cabling" in the user guide.

    • If yes, no further action is required.

    • If no, go to 6.

  6. Replace the cable between the component hosting the sensor and the mainboard. Then, check whether the alarm is cleared.

    • If yes, no further action is required.

    • If no, go to 7.

  7. Replace the component holding the sensor. Then, check whether the alarm is cleared.

    For details, see "Replacing Parts" in the server user guide.

    In this example, replace the rear hard disk backplane.

    • If yes, no further action is required.

    • If no, go to 8.

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

    For details about how to replace the mainboard, see "Replacing Parts" in the server user guide.

    • If yes, no further action is required.

    • If no, go to 9.

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

Document ID: EDOC1000054724

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