Replacing an Expansion Module (for a SAS 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

• The 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 of the expansion module are labeled on the cables.
• 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 of the expansion module or cause faults.
• An expansion module must be replaced within five minutes. Otherwise, the system heat dissipation is compromised.

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. Perform a pre-replacement check.

      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 latches on the expansion module to release the handles and pull out the expansion module, as shown in Figure 7-150.
   Figure 7-150 Removing an expansion module
   

4. Put the removed expansion module into an ESD bag.
5. Take the spare part out of its ESD bag.
6. Open the handles of the spare part, insert the spare part into the empty slot, and close the handles, as shown in Figure 7-151.
   Figure 7-151 Installing the expansion module
   

7. Connect the cables as labeled.
8. Wait about two minutes and check the status of the Power and Alarm indicators on the expansion module to determine whether the expansion module has been successfully installed. Figure 7-152 shows the locations of the Power and Alarm indicators.
   • 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 expansion module slot is faulty, or the expansion module is incorrectly installed.
   Figure 7-152 Indicators on an expansion module
   

   1

   Alarm indicator of the expansion module

   2

   Power indicator of the expansion module

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 check after the replacement as prompted.

   2. Check the system status after the replacement.

      Return to the home page, choose Home > Storage > Routine Maintenance > Health Check, and 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. If any storage-related error is reported, contact Huawei technical support.

Follow-up Procedure

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