Hi,

Please follow the following guide lines for step-by-step instruction to replace the BBU:

https://support.huawei.com/enterprise/en/doc/EDOC1100049151/e18e300d/replacing-a-bbu-for-dorado3000-v3-applicable-to-v300r002c10-and-later

Hello,

Please find below the solution.

Replacing a BBU (for Dorado3000 V3, Applicable to V300R002C10 and Later)

This section describes how to replace a BBU.

Impact on the System

• Replacing a BBU affects data security.

• During the replacement, if all other BBUs fail, the system is no longer BBU-protected. To enhance data security, the system forcibly implements LUN write protection, and the system performance is compromised.

Prerequisites

• The spare part is on hand.

• Configuration data has been backed up.

• The BBU that you want to replace has been located.

• You can locate a component in either of the following ways:

  • Locating a component based on alarms in DeviceManager: On the Alarms and Events page of DeviceManager, view the help information and determine the ID of the component to be replaced. Then locate the component at your site based on its ID.

  • Locating a component based on the status of its Running/Alarm indicator: For details about the indicators on different components, see Running/Alarm Indicators on Power Modules, BBUs, and Fan Modules.

• The two BBUs are installed in two power modules. Therefore, remove the power modules before removing the BBUs.

• When a BBU is being replaced, the power module where the other BBU resides is working properly.

Precautions

• Remove and insert a BBU with even force. Excessive force may damage the appearance or connectors of the BBU.

• Remove only one BBU at a time.

• A BBU must be replaced within three minutes. Otherwise, the system heat dissipation is compromised.

Tools and Materials

• ESD wrist strap

• ESD bag

• Labels

Procedure

1. Perform a pre-replacement check.

   
   

   Check whether there is a redundant BBU and whether the Running/Alarm indicator of the BBU is steady green, as shown in Figure 5-70. For details about the indicators on different components, see Running/Alarm Indicators on a Dorado3000 V3 Controller Enclosure (Applicable to V300R002C10 and Later).Figure 5-70 Running/Alarm indicator on a BBU
   

   You can perform replacement only when a redundant BBU exists and the redundant BBU is working properly.

   
   

   
   

2. Wear an ESD wrist strap.

3. Press the latch on the BBU to release the handle and pull out the BBU, as shown in Figure 5-71.

   
   

   Figure 5-71 Removing a BBU
   

   
   

   
   

4. Press the latch on the BBU and pull the BBU out of the removed power module, as shown in Figure 5-72.

   
   

   Figure 5-72 Removing a BBU
   

   
   

5. Place the removed BBU into an ESD bag.

6. Take the spare part out of its ESD bag.

7. Insert the spare part into the empty slot until it clicks into place, as shown in Figure 5-73.

   
   

   Figure 5-73 Installing a BBU
   

   
   

   
   

8. Open the handle of the spare part, insert the spare part into the empty slot, and close the handle, as shown in Figure 5-74.

   
   

   Figure 5-74 Installing a power module
   

   
   

   
   

9. Wait about two minutes and check the status of the Running/Alarm indicator on the BBU to determine whether the BBU has been successfully installed. Figure 5-75 shows the location of the Running/Alarm indicator.

   
   

   Figure 5-75 Running/Alarm indicator on a BBU
   

   
   

   
   

• If the indicator is steady green or blinking green, the BBU has been successfully installed.

• If the indicator is steady red or off, the newly installed BBU is faulty, the BBU slot is faulty, or the BBU is incorrectly installed.

Confirm the replacement.

After the preceding procedure is complete, check services on the host for storage-related errors. If any storage-related error is reported, contact Huawei technical support.

Follow-up Procedure

After the BBU is replaced, label it to facilitate subsequent operations.

Thanks!