Replacing a Cache SSD Card (2 U/4 U TaiShan V1)

Impact on the System

• If SSD cards are faulty, the system performance decreases by 30% to 35% but data consistency is not affected.
• During the replacement of SSD cards, the data durability decreases during data reconstruction. After the reconstruction is complete, the data durability recovers.
• Before replacing an SSD card on a storage node, you must power off the node. This affects the services running on the node.

Precautions

A node can remain in maintenance mode for 45 minutes. After that, you need to manually switch the node to the maintenance mode again.

Prerequisites

• A spare SSD card is ready.
• The SSD card to be replaced has been located.
• The storage pool to which the SSD card to be replaced belongs is normal, and no data reconstruction task is running.

Tools and Materials

• Flat-head screwdrivers
• Phillips screwdrivers
• ESD gloves
• ESD wrist straps
• ESD bags
• Labels

Procedure

1. Disconnect all power cables and signal cables.
2. Remove the node.
   1. Loosen the captive screws on the panel using a Phillips screwdriver. See (1) in Figure 1. Slowly pull out the storage node along the guide rails. See (2) in Figure 1.
      Figure 1 Pulling out a storage node
      
   2. Lever the latches on both sides upwards, hold the bottom of the storage node, and remove the node in the arrow direction. See Figure 2.
      Figure 2 Removing a storage node from holding rails
      
   3. Put the removed storage node on an ESD table.

3. Remove the chassis cover.
   1. Loosen the handle screw of the chassis cover using a flat-head screwdriver. See Figure 3.
      Figure 3 Removing a chassis cover
      
   2. Pull out the handle to push the chassis cover backwards. See (2) in Figure 3.
   3. Lift the chassis cover. See (3) in Figure 3.

4. Remove the riser card.

   Loosen the screw on the riser card and lift the riser card. See Figure 4.

   Figure 4 Removing a riser card
   

5. Remove the PCIe card from the riser card.
   1. Rotate the PCIe card latch to open it. See (1) in Figure 5.
      Figure 5 Removing a PCIe card from a riser card
      
   2. Pull out the PCIe card. See (2) in Figure 5.

6. Put the removed SSD card into an ESD bag.
7. Take the spare SSD card out of its ESD bag.
8. Install the PCIe card on the riser card.
   1. Insert the PCIe card into the PCIe slot. See (1) in Figure 6.
      Figure 6 Installing a PCIe card on a riser card
      
   2. Close the latch on the PCIe slot. See (2) in Figure 6.

9. Install the riser card.

   Place the riser card and tighten the screw. See Figure 7.

   

   If there is no screw at (2), use both hands to press the riser card downwards with even force to ensure that the riser card is securely installed.

   Figure 7 Installing a riser card
   

10. Install the chassis cover.
    1. Place the chassis cover horizontally, align it with the fixing slots on both side panels of the chassis, and close the handle. See (1) and (2) in Figure 8.
       Figure 8 Installing a chassis cover
       
    2. Tighten the screw using a flat-head screwdriver to secure the handle. See (3) in Figure 8.

11. Put the storage node into the cabinet.
    1. Pull out the inner rails as far as they will go. See Figure 9.
       Figure 9 Pulling out an inner rail
       
    2. Align the positioning pins on the storage node with the holes on the inner rails, push the node forward until you hear a sound, and ensure that the latches eject and completely block the pins to affix the storage node to the inner rails. See Figure 10.
       Figure 10 Installing a storage node
       
    3. Press the release buttons on both sides and push the storage node into the cabinet along the holding rails. See (1) and (2) in Figure 11.
       Figure 11 Pushing a storage node into a cabinet along holding rails
       
    4. Tighten the captive screws on the mounting ears to secure the storage node. See Figure 12.
       Figure 12 Securing a storage node
       

Follow-up Procedure

Label the replaced SSD card to facilitate subsequent operations.