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OceanStor 9000 V100R001C30 Parts Replacement 14

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Replacing an NVDIMM Module

Replacing an NVDIMM Module

This section explains how to replace an NVDIMM module for a P12.

Impact on the System

The P12 must be powered off before replacement of an NVDIMM module. Therefore, the services running on the P12 will be affected. Perform this operation with caution.

Prerequisites

  • A new NVDIMM module is available.
    NOTE:

    The NVDIMM memory to be installed must be unused new devices.

  • The NVDIMM module is in the rear of the main control board enclosure. You need to remove the main control board enclosure top cover and air hood first.

Precaution

  • Use KVM to log in to the OS as user root (default password is Root@storage), then run poweroff to poweroff the node and wait for the shutdown to complete. Wait for the KVM screen to have no output, indicates that the shutdown has been completed. If the replacing operation is performed before shutdown the node, part of users' data could be damaged.
  • Only professional technical engineers are allowed to replace the NVDIMM module.
  • Each P12 has two power supplies. Make sure both supplies are disconnected.
  • When replacing an NVDIMM, you also need to replace its ultracapacitor.
  • Before the replacement, complete the cable connection between the NVDIMM module and its ultracapacitor.
  • The NVDIMM module fits in only one direction. Do not force a NVDIMM module into the socket to avoid damaging the NVDIMM module and the socket.
  • Before replacing an NVDIMM, record the system memory capacity for check and comparison after the replacement.
  • The red box in Figure 2-46 shows the NVDIMM module slot on the mainboard.
    Figure 2-46  Location of NVDIMM module

Tools and Materials

  • Phillips screwdriver
  • ESD gloves
  • ESD wrist strap
  • ESD bag
  • Labels

Procedure

  1. Use KVM to log in to the OS as user root (default password is Root@storage), then run poweroff to poweroff the node and wait for the shutdown to complete.

    Wait for the KVM screen to have no output, indicates that the shutdown has been completed.

  2. Wear the ESD wrist strap and ESD gloves. For details, see Put on an ESD wrist strap in Replacing a Main Control Board Enclosure.
  3. Label the cables on the P12 and disconnect the P12 from the power sockets and other devices.
  4. Pull out the main control board enclosure.

    1. Press the buttons on the inner sides of the two handles on the back of the enclosure, as shown in step 1 in Figure 2-47.
    2. Open the handles completely, as shown in step 2 in Figure 2-47.
    3. The main control board enclosure will be slowly pulled out when you open the handles, as shown in step 3 in Figure 2-47. Pull out the main control board enclosure and place it on an ESD platform.
    Figure 2-47  Removing the main control board enclosure from a P12

  5. Remove the cover of the main control board enclosure.

    1. Loosen the screw that fastens the cover of the main control board enclosure counterclockwise, as shown in step 1 in Figure 2-48.
    2. Remove the cover of the main control board enclosure backward, as shown in step 2 in Figure 2-48.
    Figure 2-48  Removing the cover of the main control board enclosure of a P12

  6. Take out the ultracapacitor and air deflector.
    1. Open the battery box on the air deflector, as shown in step 1 in Figure 2-49.
    2. Take out the ultracapacitor in the battery case, as shown in step 2 in Figure 2-49.
    3. Separate the ultracapacitor and air deflector along the cable rail of the air deflector, as shown in step 3 in Figure 2-49.
    4. Take out the air deflector upward, as shown in step 4 in Figure 2-49.

      Figure 2-49  Take out the ultracapacitor and air deflector

  7. Open the clips to loose the NVDIMM module.
  8. Pull out the NVDIMM module upward.
  9. Put the removed NVDIMM module into an ESD bag.
  10. Take the NVDIMM module to be installed out of the ESD bag.
  11. Complete the cable connection between the NVDIMM module and its ultracapacitor.
  12. Align the NVDIMM module with the slot and insert the memory module into the slot.
  13. Close the clips to lock the NVDIMM module.
  14. Install the air hood.
  15. Secure the ultracapacitor.
    1. Secure the cable of the ultracapacitor along the air deflector's rail, as shown in step 1 in Figure 2-50.
    2. Put the ultracapacitor into the air deflector's battery case and secure it, as shown in step 2 in Figure 2-50.
    3. Put on the battery case cover, as shown in step 3 in Figure 2-50.

      Figure 2-50  Secure the ultracapacitor

  16. Install the cover of the main control board enclosure.

    1. Push the cover of the main control board enclosure into place, as shown in step 1 in Figure 2-51.
    2. Fasten the screw on the cover clockwise, as shown in step 2 in Figure 2-51.
    Figure 2-51  Installing the cover of the main control board enclosure of a P12

  17. Install the main control board enclosure.

    1. Hold the main control board enclosure and slide it into the cabinet, as shown in step 1 in Figure 2-52.
    2. Lift the two handles on the back of the main control board enclosure upward to push the main control board enclosure into place, as shown in step 2 in Figure 2-52. Close the two handles.
    Figure 2-52  Installing the main control board enclosure for a P12

    After hardware installation, if there are operations need to be performed using BIOS, for the initial startup, clear NVDIMM data using the BIOS. Otherwise, the operating system may fail to be started. Before connecting the power cable and powering on the storage node, connect the KVM cable, and then adjust the display content of the KVM to the port connected to the storage node.

  18. Connect the P12 with the power supply and other devices. Ensure that the cables are connected properly, and then power on the device.
  19. Clear NVDIMM data.
    1. During the system startup process, press Esc when the Press Esc for boot options message is displayed, choose SCU, input the BIOS password to enter the BIOS screen.

      Figure 2-53  Pressing Esc

      Figure 2-54  Choosing SCU

    2. Choose Security > Clear NvDimm Flash.

      Figure 2-55  Choosing Clear NvDimm Flash

    3. In the Clear NvDimm Flash? dialog box, select Yes and press Enter.

      Figure 2-56  Starting to clear NVDIMM data

    4. Wait 20 seconds. Check whether the displayed dialog box states "Clear NvDimm flash success. Please reboot system!"

      • If yes, go to 19.e.
      • If no, contact technical support.
      Figure 2-57  Clearing NVDIMM data

    5. Press Enter and then F10. In the dialog box that is displayed, select Yes to save the configuration and restart the storage node.

      Figure 2-58  Saving the configuration and restarting the storage node

  20. During the system startup, enter the BIOS to check the system memory capacity.

    During the system startup, when the information as shown in Figure 2-59 is displayed, press Esc, choose SCU when the window display as shown in Figure 2-60, input the BIOS password to enter the BIOS screen, then check the system memory capacity, as shown in Figure 2-61.
    Figure 2-59  Press Esc

    Figure 2-60  Choose SCU

    Figure 2-61  Check the system memory capacity

    NOTE:
    The capacity that is displayed in Total Memory is the sum of the NVDIMM memory capacity and common memory capacity.
    • If the memory capacity equals to the actual capacity, the installation is successful.
    • If the system memory capacity is smaller than the actual capacity, the memory module may be incorrectly installed. Remove and reinstall the memory module.

  21. Log in to DeviceManager to check if any alarm about NVDIMM exists.
  22. Run the script to check the status of the storage node.

    cd /opt/huawei/deploy/script

    ./envcheck.py

    Normal result is as follows:
    [2014-11-05 16:45:02,491][INFO    ][module:envcheck, line:0620] 
    ********************************************************************************
    Check Item: SNAS Environment Check Summary
    Check Pass:True
    Check Cmd :
    Check Info:
    kernel version: OK
    nvdimm driver: OK
    TOE driver: OK
    HardRaid status: OK
    Firewall status: OK
    Command Output:
    ********************************************************************************
    

  23. Check whether the network ports of the storage node are named A0-0, A0-1, B3-0, and B3-1.
    1. Run ifconfig -a on the KVM to check whether the network ports of the storage node are named A0-0, A0-1, B3-0, and B3-1.

      • If yes, go to 24.
      • If no, go to 23.b.

    2. Run reboot to restart the storage node to identify the new network adapter.
  24. Check the status of the storage node on the DeviceManager.
    1. Start the browser on the maintenance terminal and log in to the DeviceManager.
    2. In the Alarms area on the home page, check whether a new alarm is reported.

      • If yes, handle the alarm according to the alarm help.
      • If no, go to 24.c.

    3. Click Device View to go to the device view.
    4. In Nodes, check the status of the node that is newly added to the cluster.

      • Health Status: Normal
      • Running Status: Online

Follow-up Procedure

After replacing the NVDIMM module, label the removed NVDIMM module for subsequent handling.

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Updated: 2018-10-27

Document ID: EDOC1000075654

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