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Parts Replacement 12

OceanStor 18500 V3 and 18800 V3 Mission Critical Storage System V300R003

This document describes the procedure for replacing the parts of storage system in terms of safety operations, preparations, and precautions.
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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 a Controller (Button Cells Included)

Replacing a Controller (Button Cells Included)

This section describes how to replace a controller. If a button cell is faulty, replace the controller to which the button cell belongs.

Impact on the System

  • During the replacement of a controller, if there are more than one controller, all services on the to-be-replaced controller are switched to the peer-end controller, with a 5s to 10s storage I/O suspension. The service switchover duration increases if the service load is heavy.
  • During the replacement of a controller, system performance and reliability are compromised. Therefore, you are advised to replace a controller during off-peak hours.

Prerequisites

  • If the version of the controller to be replaced is from V300R003C00SPC100 to V300R003C00SPH103 (excluding V300R003C00SPH103), upgrade the system to V300R003C00SPH103 or a later version before replacing the controller.
  • If the version of the controller to be replaced is from V300R003C10SPC100 to V300R003C10SPH105 (excluding V300R003C10SPH105), upgrade the system to V300R003C10SPH105 or a later version before replacing the controller.
  • If the version of the controller to be replaced is from V300R003C20SPC200 to V300R003C20SPH203 (excluding V300R003C20SPH203), upgrade the system to V300R003C20SPH203 or a later version before replacing the controller.
  • A replacement controller is ready.
  • The controller that you want to replace has been located.
    NOTE:
    You can locate a component in either of the following ways:
    • Log in to DeviceManager, and go to the System page. On the System page, check the device view and locate the position of the component to be replaced. If the component has a location indicator, turn on the indicator. (For details about how to turn on a location indicator, see the online help of DeviceManager.)
    • Use the alarm indicator of the component to locate its component.
  • Each controller is equipped with three fan modules. Before replacing a controller, ensure that the fan modules of the other controllers work properly.
  • Before the replacement, restore the password of account ibc_os_hs for each controller to the default one.
    NOTE:
    Since spare controllers have their own default passwords. In such a case, controllers with the same password can communicate with each other. For details about how to change the password of account ibc_os_hs, see the Installation Guide.
  • After a user manually replaces the public/private key pairs of ibc_os_hs, the public/private key pairs of all other functional controllers must be initialized before controller replacement.
    NOTE:
    To check whether ibc_os_hs public/private key pairs are the default ones, see the check message of the FRU tool. To initialize the public/private key pairs, log in to the serial port of the engine with the user account _super_admin (the default password is Admin@revive) and run the initibckey command.
  • If the storage system in the current version allows SSH port IDs to be configured, the SSH port ID of each controller in the storage system must be 22 by default.
    NOTE:
    Run show system server_port server_name=SSH to check whether the SSH port ID is 22. If the port ID is not 22, run change system server_port server_name=SSH port_num=22 to change it to 22.
  • If the controller to be replaced is in minisystem state (After log in to the CLI of the controller, Storage: minisystem> is displayed), run the showbootmode command to check whether the boot mode of the storage system is normal.
    • If the command output is boot -> boot_osp, the boot mode is normal. Find the fault reason and rectify the fault before replacing the controller.
    • If the command output is boot -> boot_rescue, the boot mode is abnormal. Run the resumebootmode command to restore the boot mode to normal before replacing the controller.

Precaution

  • Remove and insert a controller with even force. Excessive force may damage the appearance or connectors of the controller.
  • Remove only one controller at a time.
  • A controller must be replaced within ten minutes. Otherwise, the system heat dissipation is compromised.
  • An engine's controller and assistant cooling unit (ACU) have the same appearance, but can be distinguished according to the silkscreen in the lower left corner of the front panel. CTM refers to a controller and ACU refers to an assistant cooling unit.
  • If a single controller fails, use the SmartKit to replace it when the other controller is working properly. If the entire controller enclosure has been powered off, power on the functioning controller before replacing the faulty one.
  • If both controllers of a controller enclosure fail, contact Huawei technical support engineers for assistance.
  • Standard spare parts must be used to replace controllers. Do not use non-spare parts to prevent service damage. In the event of special requirements, contact technical support engineers.

Tools and Materials

  • ESD wrist strap
  • ESD bag
  • Labels

Procedure

  1. Check system status before replacement.
    1. Perform a system status inspection.

      Start Toolkit. On the homepage, choose MyTools > Storage > Parts Replacement > Inspection. The Inspection Wizard step 5-1:Welcome page is displayed after you go to the Inspection page. On the wizard, select Routine inspection and perform the inspection as instructed by the wizard.

      For details, you can click .

      NOTE:

      If some items fail the inspection, rectify the faults by performing the recommended actions in the inspection reports. Ensure that all other parts except the parts to be replaced are working correctly.

    2. Perform a pre-replacement inspection.

      On the homepage, choose MyTools > Storage > Parts Replacement > FRU Replacement. On the FRU Replacement page, select the part that you want to replace and perform the pre-replacement inspection as prompted. For details, see Using Toolkit for Parts Replacement (Recommended).

      NOTE:

      If the FRU tool fails to identify a controller fault because the controller is faulty or absent, skip this step and perform steps 2 to 8 to replace the faulty controller manually.

      You can proceed to next step only when all items pass the pre-replacement check and the replacement page is displayed. If any item fails, rectify the fault by taking recommended actions in the inspection reports.

  2. Wear an ESD wrist strap.
  3. Press the latch on the controller to release the handles and pull out the controller, as shown in Figure 4-1.

    Figure 4-1  Removing a controller

  4. Take the replacement controller out of its ESD bag.
  5. Remove the three fan modules from the original controller and install them on the replacement controller.
    1. Press the latch on the panel, open the panel, and pull out the three fan modules one by one, as shown in Figure 4-2.

      Figure 4-2  Removing fan modules

    2. Insert the three fan modules into the replacement controller and close the panel, as shown in Figure 4-3.

      Figure 4-3  Installing fan modules

  6. Place the removed controller into an ESD bag.
  7. Fully open the handles of the replacement controller, insert the controller into the empty slot until it clicks into place, and close the handles, as shown in Figure 4-4.

    Figure 4-4  Installing a controller

  8. Wait about thirty minutes (a maximum of sixty minutes) and check the status of the Power and Alarm indicators on the controller to determine whether the controller is successfully installed, as shown in Figure 4-5.

    NOTE:

    When the firmware version of the newly installed controller is inconsistent with that of the replaced controller, firmware will be synchronized between controllers and the synchronization will take about 60 minutes. If the new controller fails to be powered on in 60 minutes, contact Huawei technical support engineers. Do not remove the controller or power off the storage system.

    • If the Power indicator is steady on and the Alarm indicator is off, the controller is successfully installed.
    • If the Power indicator is off or the Alarm indicator is steady on, the newly installed controller is faulty, the controller slot is faulty, or the controller is incorrectly installed.
    Figure 4-5  Indicators on a controller

    1

    Power indicator on a controller

    2

    Alarm indicator on a controller

  9. Confirm the replacement.
    1. Perform a post-replacement inspection.

      After the replacement, on the Toolkit page, click Replaced. Perform the post-replacement inspection as prompted.

      NOTE:

      If the FRU tool fails to identify a controller fault because the controller is faulty or absent, skip this step, go to 9.b and 9.c.

    2. Check the system status after the replacement.

      Check the system status again on the Inspection page after the replacement. If any inspection item fails, rectify the fault based on the suggestions.

    3. Check services on a host for any storage-related error.

Follow-up Procedure

After a controller is replaced, label it to facilitate subsequent operations.

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Updated: 2019-05-15

Document ID: EDOC1000084105

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