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CH225 V3 Compute Node V100R001 User Guide 07

This document describes the appearance, functions, and structure of the CH225 V3 storage expansion compute node (CH225 V3 for short), and methods of installing, removing, and configuring the CH225 V3.
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Installing a CPU

Installing a CPU

This section describes the precautions and procedure for installing a CPU to a CH225 V3.


  • Only personnel authorized by Huawei and Huawei technical support are allowed to install CPUs on Huawei servers.
  • Do not wear ESD gloves during CPU replacement. The gloves may catch on the pins on the bottom of the CPU and damage it.

Install a CPU if:

  • A faulty CPU needs to be replaced.
  • A CPU of a newer model needs to be used.

Figure 8-36 shows the numbering and positions of the CPUs.

Figure 8-36 Numbering and positions of CPUs




Data preparation is not required for this operation.


  • ESD wrist strap.
  • M3 Phillips screwdriver.


Spare CPU.


  1. Take the spare CPU out of its ESD bag.
  2. Before installing CPUs, ensure that CPU sockets do not have bent pins and are free from foreign objects.

    If a CPU socket has bent pins or foreign objects, stop installing the CPU and contact Huawei technical support.

  3. Before installing a CPU or heat sink, use tissue to clean up the oil, remaining thermal compound, or foreign objects on their surfaces.
  4. Wear finger cots and latch the CPU into one side of the CPU installation tool. Ensure that the triangle marks (polarities) on the CPU, CPU socket cover, and CPU socket face the same direction. Figure 8-37 shows the triangle marks (polarities). Figure 8-38 shows the operation procedure.

    Figure 8-37 Triangle marks (polarities)
    Figure 8-38 Latching a CPU into one side of a CPU installation tool

  5. Pull out the other side of the CPU installation tool and squeeze the tool downward to latch the CPU. See Figure 8-39.

    Figure 8-39 Pulling out the other side of a CPU installation tool

  6. Latch the CPU into the other side of the CPU installation tool. See Figure 8-40.

    Figure 8-40 Latching a CPU into the other side of a CPU installation tool

  7. Ensure that the CPU are properly latched into the two sides of the CPU installation tool. See Figure 8-41.

    Figure 8-41 CPU installation tool with the CPU inside

  8. Determine the area on the CPU for contacting the heat sink, and paste 0.4 ml of thermal compound on the area.


    The thermal compound injector has volume marks.

    You can paste thermal compound using any of the six methods shown in Figure 8-42. Dual-line, five-point, and S-shape, and cross pasting methods are recommended.

    Figure 8-42 Pasting methods

  9. Use a clean card to smear the thermal compound over the entire center of the CPU and ensure that the CPU installation tool is free of thermal compound.

    The thermal compound layer is as thick as a common piece of paper. Figure 8-43 shows the smeared thermal grease layer. Ensure that the thermal compound is evenly and fully painted.

    Figure 8-43 Smeared thermal compound layer

  10. Squeeze two sides of the CPU installation tool and raise the tool with the CPU inside. See Figure 8-44.

    Figure 8-44 Raising a CPU installation tool with a CPU inside

    • To prevent damage to the CPU, CPU socket, or mainboard, ensure that the securing rod on the CPU socket is fully open before you install the CPU in the socket.
    • When you close the securing rod, do not exert excessive force or touch any components and gild pins on the CPU.
    • Do not move the CPU if it is not correctly placed to avoid any twisted pins. Lift the CPU until it is out of the socket, and then place it in the socket properly.

    Hold the CPU horizontally, align it with the CPU socket, and place the CPU vertically downwards into the socket. See step (1) in Figure 8-45.

    Align the triangle mark on the CPU with the triangle mark on the CPU socket to ensure that the CPU is properly installed. Figure 8-46 shows a CPU that is incorrectly placed.

    Figure 8-45 Installing a CPU
    Figure 8-46 Wrong way to place a CPU

  11. Close the cover that secures the CPU. See step (2) in Figure 8-45.
  12. Lower the securing rod near the or label. See step (3) in Figure 8-45.
  13. Lower the securing rod near the or label. See step (4) in Figure 8-45.
  14. Align the screws on the heat sink with the fastening studs on the CPU base, and place the heat sink on the CPU. See step (1) in Figure 8-47.

    Figure 8-47 Installing the heat sink

  15. Use a Phillips screwdriver to tighten one pair of diagonally opposite screws on the heat sink halfway and then tighten the other pair of screws. See step (2) in Figure 8-47.
  16. Verification Method.

    1. Power on the compute node.
    2. In the address bar of Internet Explorer, enter https://IP address of the iBMC management network port.
    3. On the iBMC login page, enter the user name and password.
      • User Name : Enter the default user name root.
      • Password : Enter the default password Huawei12#$.
    4. In the Domain drop-down list box, choose This iBMC, and click Log In.
    5. Choose Information > System Info > Processors.
    6. Check the CPU information to ensure that the replacement is successful.

Updated: 2019-07-10

Document ID: EDOC1000095351

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