Replacing an MPO-4*DLC Optical Fiber (for 8 Gbit/s Fibre Channel Interface Module (Eight Ports)/16 Gbit/s Fibre Channel Interface Module (Eight Ports))

Impact on the System

During the replacement of an MPO-4*DLC optical fiber, the system switches services from the fibers (four array ports) to other ports on this controller or on the peer controller. If available links are unable to bear the current service load, host latency increases and the system performance degrades. If there are no redundant links, services carried by the optical fiber will be interrupted.

Prerequisites

• A spare part is on hand.
• The optical fiber that you want to replace has been located.

Precautions

• Use even force when you remove or insert an optical fiber. Excessive force may damage the appearance or connector of the optical fiber.
• Do not frequently remove and insert a cable. Wait at least 15 seconds between removal and insertion.
• There are four links on the optical fiber. If you want to replace the 8 Gbit/s Fibre Channel interface module (eight ports)/16 Gbit/s Fibre Channel interface module (eight ports), ensure that all working links have backup links. You are advised to disable the ports of the switch that connect to the 8 Gbit/s Fibre Channel interface module (eight ports)/16 Gbit/s Fibre Channel interface module (eight ports) and switch the services on these ports to backup links to avoid interruption during the replacement.

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 redundant paths to the host.

      For details, see Checking the Multipathing Status in the Performance Monitoring Guide.

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

      Start SmartKit and choose Home > Storage > Parts Replacement > Parts Replacement. On the Parts Replacement page, click FRU Replacement. Then complete the check before the replacement as prompted. For details, see Replacing an FRU.

   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. Grip the green part of the optical fiber, remove the MPO end of the optical fiber from the optical module, and cover the optical fiber with a dustproof cap, as shown in Figure 7-71.

   Do not look into the optical port without eye protection. The laser beam on the optical interface board or from the fiber may cause injuries to eyes.

   Figure 7-71 Removing the MPO end of the optical fiber
   

4. Remove the DLC ends of the optical fiber from the ODF distribution box and cover the optical fiber with a dustproof cap, as shown in Figure 7-72.

   Do not look into the optical port without eye protection. The laser beam on the optical interface board or from the fiber may cause injuries to eyes.

   Figure 7-72 Removing the DLC ends of the optical fiber
   

5. Take the spare part out of its ESD bag.
6. Take the dustproof cap off the MPO end of the optical fiber. Point the white dot of the optical fiber downward and insert it directly to the optical module. Grip the black connector and push it forward until you hear the click or feel the vibration, as shown in Figure 7-73.

   Do not look into the optical port without eye protection. The laser beam on the optical interface board or from the fiber may cause injuries to eyes.

   Figure 7-73 Installing the MPO end of the optical fiber
   

7. Take the dustproof caps off the DLC ends of the optical fiber and insert the optical fiber into the ODF distribution box, as shown in Figure 7-74.

   Do not look into the optical port without eye protection. The laser beam on the optical interface board or from the fiber may cause injuries to eyes.

   Figure 7-74 Installing the DLC ends of the optical fiber
   

8. View the Port indicator, and determine whether the installation is successful.
   • If the indicator is steady green or blue, the optical module has been successfully installed.
   • If the indicator is steady red or off, the newly installed MPO-4*DLC optical fiber is faulty, or incorrectly installed.

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.

      On the Parts Replacement page, click Inspection to check the system status again. If any item fails inspection, 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 optical fiber is replaced, label it to facilitate subsequent operations.