Replacing a System Disk Module (OceanStor A310)

Impact on the System

• If RAID 1 has been configured for system disk modules, replacing one system disk module will not affect system running. If RAID 1 is not configured for the system disk modules, replacing one system disk module will cause system errors.
• Before replacing a system disk module on a node, you must power off the node. This affects the services running on the node.

Prerequisites

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

• The faulty system disk module has been located.

Precautions

• Do not remove the two system disk modules on a device at the same time. Otherwise, the device will not work properly.
• To prevent system faults, do not replace system disk modules with ones that have been used before.
• To prevent replacement failures, ensure that replacement disk modules are free from obvious foreign objects, collision, and scratches.
• To prevent replacement failures, ensure that the disk slots are free from foreign objects or obvious damage before installing disk modules.
• To prevent system faults, use the BOM code of the faulty disk module to apply for a replacement disk module.
• To prevent damaging system disk modules or connectors, remove and install disk modules with even force.
• When replacing a system disk module, hold down the node power button. After the backup power data is flushed to disks and the node running indicator is off, remove the faulty node.
• After a system disk module on a device is replaced, data will be reconstructed on the replacement system disk module. Do not remove and insert the other system disk module on the device during data reconstruction. Otherwise, the device will not work properly.

During the replacement of system disk modules, complete the following operations within ten minutes: Remove the node, remove and insert system disk modules, and install the node back into the system subrack. Otherwise, the heat dissipation of the storage device will be affected and the system will be faulty.

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. Remove the faulty node.
   

   The time from node removal to installation and restoration cannot exceed ten minutes. Otherwise, the system will be faulty due to overtemperature.

   1. Press the release button on the node. The ejector levers of the node automatically eject. Fully raise the ejector levers. See (1) in Figure 2.
      Figure 2 Removing a node
      
   2. Hold the ejector levers and slowly pull the node out of the system subrack. See (2) in Figure 2.

3. Remove the node cover.
   1. Press the release button on the cover and push the cover outwards. See (1) and (2) in Figure 3.
      Figure 3 Removing a node cover
      
   2. When the cover is completely loose, slowly remove it from the node.

4. Remove the faulty disk module.
   Press the latch that secures the disk module, tilt the disk module upwards by 20° to 30°, and remove the disk module. See (1) and (2) in Figure 4.

   Figure 4 Removing a disk module
   

5. Put the removed disk module into an ESD bag.
6. Take the replacement disk module out of its ESD bag.
7. Install the replacement disk module.
   1. Tilt the disk module by 20° to 30° and insert it into the slot.
   2. Press the latch of the disk module and the disk module at the same time until the disk module is secured by the latch. See (1) and (2) in Figure 5.
      Figure 5 Installing a disk module
      

8. Install the node cover.
   Place the cover latch into the node slot, and align the cover with the node. Press the release button on the cover, and push the cover inwards. See (1) and (2) in Figure 6.

   Figure 6 Installing a node cover
   

   Push the cover into the node completely. See Figure 7.

   Figure 7 Node
   

9. Install the faulty node.
   1. Press the release button on the node. The ejector levers eject automatically. Hold the ejector levers to maximize the angle, and push the node into the system subrack along the guide rails. See (1) and (2) in Figure 8.
      Figure 8 Installing a node
      
   2. After pushing the node into the system subrack, reset the ejector levers until they click into place. This ensures that the node is completely locked into the system subrack. See (3) in Figure 8.
   3. Press the power button on the node to power on the node.

10. 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 secured to the system subrack. See (1) and (2) in Figure 9.

    Figure 9 Installing a front panel cover
    

Follow-up Procedure

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