Replacing an Expansion Module (for a High-Density Disk Enclosure)

Impact on the System

During the replacement of an expansion module, the system switches services from ports on this module to ports on the other expansion module in the same disk enclosure. Only one expansion module is working, causing the system reliability to degrade. You are advised to replace an expansion module during off-peak hours.

Prerequisites

• A spare part is on hand.
• The expansion module 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 "Indicator Introduction" of each component in the Product Description specific to your product model and version.

• You have confirmed that the cables of the expansion module to be replaced are properly connected using Huawei Storage Product Networking Assistant (https://support.huawei.com/onlinetoolsweb/sna/#/home).
• The cable connection positions have been labeled on the spare part.
• The cables have been disconnected from the expansion module that you want to replace.

Before removing a SAS cable, gently push the connector of the cable inward. Then pull the plastic ring on the connector outward until the cable is completely removed from the expansion module.

Precautions

• Remove and insert an expansion module with even force. Excessive force may damage the appearance or connectors of the expansion module.
• Shorten the duration of replacing an expansion module as short as possible.

Tools and Materials

• ESD wrist strap
• ESD bag
• Labels

Procedure

1. Check status before replacement.
   1. Check system status.

      Start SmartKit and choose Home > Storage > Routine Maintenance > Health Check. On the Health Check page, perform inspection as instructed. For details, see Checking System Status.

      If any 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 properly.

   2. Check the status of the parts to be replaced.

      Start SmartKit and choose Home > Storage > Parts Replacement > More > Parts Replacement (CRU). On the CRU replacement page, complete the check before the replacement as prompted. For details, see Replacing a CRU.

   You can proceed to next steps only when all items pass the pre-replacement check and the replacement page is displayed. If any item fails, rectify the fault as prompted.

2. Wear an ESD wrist strap.
3. Press buckles on the expansion module, open the latches, and pull out the expansion module, as shown in Figure 7-157.
   Figure 7-157 Removing an expansion module
   

4. Place the removed expansion module into an ESD bag.
5. Take the spare part out of its ESD bag.
6. Open latches on the spare part, insert the spare part, and close the latches, as shown in Figure 7-158.

   When installing the expansion module, apply even force and close the ejector levers on both sides of the expansion module.

   Figure 7-158 Installing an expansion module
   

7. Connect cables of the expansion module.
8. Wait approximately two minutes and check the status of Power and Alarm indicators on the expansion module to determine whether the expansion module has been successfully installed. Figure 7-159 shows the locations of Power and Alarm indicators on the expansion module.
   • If the Power indicator is steady on and the Alarm indicator is off, the expansion module has been successfully installed.
   • If the Power indicator is off or the Alarm indicator is steady on, the newly installed expansion module is faulty, the slot for the expansion module is faulty, or the expansion module is incorrectly installed.
   Figure 7-159 Indicators on an expansion module
   

   1

   Power indicator

   2

   Alarm indicator

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

      After the parts replacement, return to the SmartKit page and click Replaced. Then complete the parts check after the replacement as prompted.

   2. Check system status.

      Choose Home > Storage > Routine Maintenance > Health Check to check the system status again. If any inspection item fails, rectify the fault based on the suggestions in the inspection report.

   3. After the preceding procedure is complete, check services on the host for storage-related errors.

Follow-up Procedure

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