Replacing a Metadata Disk Module (OceanStor Pacific 9520 14- or 16-Slot)

Impact on the System

If the system has heavy service loads, the replacement will increase the service response time. Therefore, perform the replacement during off-peak hours.

Prerequisites

• The replacement disk module (spare part) has been prepared.
• The faulty disk module has been located.

Precautions

• When replacing a metadata disk, wait at least 30 seconds after it is removed before you insert a new one.
• A node can remain in maintenance mode for 45 minutes. After that, you need to manually switch the node to the maintenance mode again.
• To prevent replacement failures, ensure that the replacement metadata disk is free from obvious foreign objects, collision, and scratches.
• To prevent replacement failures, ensure that the metadata disk slot is free from foreign objects or obvious damage before installing the metadata disk.
• To prevent system faults, do not replace disk modules with ones that have been used before.
• To prevent system faults, use the BOM code of the faulty disk module to apply for a replacement disk module.
• Remove metadata disks in sequence. Remove one metadata disk completely before removing another.
• Insert metadata disks in sequence. Insert one metadata disk completely before inserting another.

Tools and Materials

• ESD gloves
• ESD wrist strap
• ESD bag
• Labels

Procedure

1. Remove the front panel cover.

   Press the release button on the right of the front panel cover, tilt the front panel cover by 20° to 30° forward, and move the front panel cover rightward to separate it from the groove on the left of the system subrack. Then, remove the front panel cover. See (1), (2), and (3) in Figure 1.

   Figure 1 Removing a front panel cover
   

2. Press the release button on the front disk drawer. The handle automatically ejects. Use both hands to pull out the front disk drawer until you hear a click. See (1) and (2) in Figure 2.
   

   • The duration from the time when the disk drawer is pulled out to the time when the disk drawer is reset cannot exceed three minutes. Otherwise, the system will be faulty.
   • If the replacement is not complete within 3 minutes, reset the disk drawer and wait for at least 10 minutes to ensure that the node temperature is normal. Then open the disk drawer again.
   Figure 2 Unlocking a front disk drawer
   

3. Remove the disk module.
   

   When removing disk modules, correctly record the slots where disk modules reside.

   1. Press the release button on the rear cover of the disk module, lift the rear cover, and push the disk module backwards. See Figure 3.
      Figure 3 Unlocking a disk module
      
   2. Lift the disk module slightly by using the auxiliary handle, and then lift the disk module out. See Figure 4.
      Figure 4 Removing a disk module
      

4. Put the removed metadata disk into an ESD bag.
5. Take the replacement metadata disk out of its ESD bag.
6. Install the disk module.
   

   Ensure that disk modules are inserted into the same slots before and after the replacement. Otherwise, services may be affected.

   1. Place the disk module downwards into the drawer. See Figure 5.
      Figure 5 Installing a disk module
      
   2. Push the disk module forward until it cannot move, and then reset the rear cover of the disk to lock it. Ensure that the disk module is securely installed. See Figure 6.
      Figure 6 Locking a disk module
      

7. Check the installation.

   After inserting the disk module, wait 5 seconds and then check the disk module running indicator to determine whether the disk module has been successfully installed.

   If the disk module running indicator is steady green, the disk module is successfully installed. In this case, go to the next step. Otherwise, the disk module fails to be installed and you need to perform the following operations to restore the installation:

   1. Check whether the disk module has been firmly inserted. If not, wait 30 seconds and reinsert it.
   2. If the disk module still fails to be installed after you reinsert it, the link of the disk slot may be faulty. In this case, contact technical support.

8. Push the disk drawer back into the system subrack.
   1. Press and hold the release buttons on both sides of the disk drawer and push them in the arrow direction to push the disk drawer back into the system subrack. See (1) and (2) in Figure 7.
      

      • Do not press the front end of the release buttons with your fingers. Otherwise, the release buttons may be damaged.
      • When resetting the disk drawer, ensure that its handles are open.
      • After pushing the disk drawer 1 cm into the system subrack, release the release buttons to prevent hands from being clamped.
      Figure 7 Resetting a disk drawer
      
   2. After the disk drawer is completely inserted into the system subrack, pull the handles to their original positions. See (3) in Figure 7.

9. Install the front panel cover.
   Align the latch on the left of the front panel cover with the groove on the left of the system subrack, and push the right of the front panel cover forward until you hear a click. Ensure that the front panel cover is fully secured to the system subrack. See (1) and (2) in Figure 8.

   Figure 8 Installing a front panel cover
   

Follow-up Procedure

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