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OceanStor 9000 V5 7.0 Parts Replacement 05

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Replacing a CPU

Replacing a CPU

A CPU provides powerful data processing capabilities and integrates the memory controller and the Peripheral Component Interconnect Express (PCIe) controller.

Impact on the System

  • Before replacing a CPU, you must power off the storage node. This will adversely affect the services running on the node. Exercise caution when performing this operation.
  • When you replace a CPU, wear an electrostatic discharge (ESD) wrist strap instead of ESD gloves. The gloves may catch on pins on the CPU socket and damage it.

Prerequisites

  • The replacement CPU is ready.
  • The faulty CPU has been located.
  • You have recorded the cable mapping of the device, securely stopped the services, executed a shut-down command in the operating system to power off the storage node, and disconnected the node from power sockets and peripheral devices.

Tools and Materials

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

Procedure

  1. Wear an ESD wrist strap.
  2. Use the KVM to log in to the operating system of the node, enter user name root and its password (default: Root@storage), and run poweroff command to power off the node.

    Wait until the KVM has no output. The power-off is complete.

  3. Remove all power cables and external signal cables.
  4. Remove the storage node from the enclosure.
    1. Loosen the captive screws on the storage node panel using a screwdriver, as shown in step 1 in Figure 3-95.

      Figure 3-95  Pulling out a storage node

    2. Pull out the storage node along the guide rails away from the cabinet, as shown in step 2 in Figure 3-95.
    3. Lever the latches on both sides upwards and remove the storage node in the direction of the arrow by holding the storage node bottom, as shown in Figure 3-96.

      Figure 3-96  Removing the storage node from the holding rails

  5. Remove the enclosure cover.
    1. Use a flat-head screwdriver to loosen the latch that secures the ejector lever of the enclosure cover, as shown in step 1 in Figure 3-97.
    2. Open the ejector lever to push the enclosure cover backwards, as shown in step 2 in Figure 3-97.

      Figure 3-97  Removing an enclosure cover

  6. Lift the air duct according to the signs on the air duct, as shown in Figure 3-98.

    Figure 3-98  Removing the air duct

  7. Determine the position of the CPU to be removed, as shown in Figure 3-99.

    Figure 3-99  CPU position

  8. Remove the heat sink.
    1. Use a Phillips screwdriver to loosen the four screws on the heat sink (the two pairs of screws that correspond to 2 on the heat sink label), as shown in step 1 in Figure 3-100. Then loosen the two screws in the diagonal direction on the heat sink (the pair of screws that correspond to 1 on the heat sink label), as shown in step 2 in Figure 3-100.

      Figure 3-100  Removing a heat sink

    2. Lift the heat sink and place it upside down on the desk.
  9. Remove the carrier with a CPU inside.
    1. Insert a flat-head screwdriver into the release slot of the CPU carrier and twist the screwdriver to raise one edge of the carrier, as shown in step 1 in Figure 3-101.

      Figure 3-101  Removing a carrier with a CPU inside

    2. Pinch the CPU carrier on the other edge, as shown in step 2 in Figure 3-101. Remove the CPU carrier with the CPU inside from the heat sink in the arrow direction, as shown in step 3 in Figure 3-101.
  10. Pull out the CPU.
    1. Bend the carrier edge with a triangular hole in the arrow direction to release the CPU from the carrier, as shown inFigure 3-102.

      NOTE:
      When removing the CPU, hold the CPU and CPU carrier to prevent them from falling.
      Figure 3-102  Removing a CPU (1)

    2. Hold both sides of the CPU to lift it upwards, as shown in Figure 3-103.

      Figure 3-103  Removing a CPU (2)

  11. Put the removed CPU into an ESD bag.

    The CPU socket cannot be exposed and must be covered by a CPU or a protective cover during transportation and storage.

  12. Optional: If a new CPU is not installed immediately, install a CPU socket cover. The CPU socket cover is properly installed when you hear a click, as shown in Figure 3-104.

    Figure 3-104  Installing a CPU socket cover

  13. Take the replacement CPU out of its ESD bag.
  14. Install the CPU.

    • Do not horizontally move the CPU if it is not properly placed to avoid twisting any pins. Lift the CPU until it is out of the socket, and then place it in the socket properly.
    • Before installing a CPU, use a clean, alcohol-moistened cloth to remove excess oil or foreign matter from the surface of the CPU, heat sink, and CPU carrier.

    1. Align the notch in the center of one CPU edge with the protrusion on the CPU carrier and secure it, as shown in Figure 3-105.

      Ensure that the CPU corner marked with a triangle is in the corner of the carrier with a triangular hole.

      Figure 3-105  Installing one edge of a CPU

    2. Bend the other edge of the CPU carrier in the direction of the arrow, as shown in Figure 3-106.

      Figure 3-106  Installing the other edge of a CPU

    3. Release the CPU carrier so that the other edge of the CPU clips into place. Check that the CPU is securely installed and level with the carrier. Press down to secure any raised parts.
  15. Determine the area on the CPU that will be in contact with the heat sink, and use a clean blade or card to evenly paste 0.4 ml of thermal compound on the area.

    NOTE:

    The thermal compound injector has volume marks.

    Six methods for pasting thermal compound are shown in Figure 3-107. Dual-line, five-point, S-shaped, and cross pasting methods are recommended.
    Figure 3-107  Pasting methods

    The thermal compound layer is as thick as a piece of common paper. Figure 3-108 shows the smeared thermal compound layer. Ensure that the thermal compound is evenly and fully painted.

    Figure 3-108  Smeared thermal compound layer

  16. Install the CPU carrier on the heat sink and ensure that all retaining clips have been inserted, as shown in Figure 3-109.

    Ensure that the CPU corner marked with a triangle is in the notched corner of the heat sink.

    Figure 3-109  Installing a CPU carrier

  17. Place the heat sink on a work surface and check that the CPU carrier is securely installed. Press down to secure any raised parts, as shown in Figure 3-110.

    Figure 3-110  Checking the retaining clips

  18. Optional: Remove the CPU protective cover, as shown in Figure 3-111.

    Figure 3-111  Removing a CPU protective cover

  19. Shine a light at various angles onto the CPU bonding pad and the CPU socket and check for bent pins, foreign matter, and bonding pad damage.

    If a CPU socket has bent pins or contains foreign matter, or the bonding pad is damaged, stop the installation and contact Huawei technical support.

  20. Install a heat sink.
    1. Align the two diagonal holes of the heat sink with the retaining clips on the CPU socket and gently position the heat sink in place.

      Do not touch the CPU components and socket pins.

    2. Tighten the two screws in the diagonal direction on the heat sink (the pair of screws that correspond to 1 on the heat sink label), as shown in step 1 in Figure 3-112. Then tighten the four screws on the heat sink (the two pairs of screws that correspond to 2 on the heat sink label), as shown in step 2 in Figure 3-112.

      Figure 3-112  Installing a heat sink

  21. Align the positioning pins on the air duct with the fixing holes on the mainboard by following the instructions on the enclosure, and vertically place the air duct downwards, as shown in Figure 3-113.

    Figure 3-113  Installing an air duct

  22. Install the enclosure cover.
    1. Place the enclosure cover horizontally, align it with the fixing slots on both side panels of the enclosure, and close the ejector lever, as shown in steps 1 and 2 in Figure 3-114.
    2. Use a flat-head screwdriver to tighten the latch in order to secure the ejector lever of the enclosure cover, as shown in step 3 in Figure 3-114.

      Figure 3-114  Installing an enclosure cover

  23. Put the storage node into the cabinet.
    1. Pull out the inner rails as far as they will go, as shown in Figure 3-115.

      Figure 3-115  Pulling out an inner rail

    2. Align the screws on the storage node with the notches on the inner guide rails, push the storage node inwards until you hear a sound, and ensure that the latches eject and completely block the screws to affix the storage node to the inner guide rails, as shown in Figure 3-116.

      Figure 3-116  Installing a storage node

    3. Press the release buttons on both sides and push the storage node into the cabinet along the holding rails, as shown in steps 1 and 2 in Figure 3-117.

      Figure 3-117  Pushing the server into the cabinet along the holding rails

    4. Optional: Tighten the captive screws on the mounting ears to secure the storage node, as shown in Figure 3-118.

      Figure 3-118  Securing the storage node

  24. Connect the storage node to the power sockets and peripheral devices according to the cable connection labels. Then power on the storage node.
  25. Log in to the storage node using the KVM.
  26. Clear NVDIMM data.
    1. When the screen shown in Figure 3-119 is displayed during the system startup, press Delete.

      Figure 3-119  BIOS startup page

      NOTE:
      If a dialog box that informs you of entering the password is displayed, enter the BIOS password (default: Admin@9000).

    2. Choose Security > Clear NvDimm Flash and press Enter, as shown in Figure 3-120.

      Figure 3-120  Choosing Clear NvDimm Flash

    3. In the Clear NvDimm Flash dialog box, select Yes and press Enter, as shown in Figure 3-121.

      Figure 3-121  Starting to clear NVDIMM data

    4. If the Clear NvDimm flash success! message is displayed, data in the NVDIMM is cleared, as shown in Figure 3-122.

      Figure 3-122  NVDIMM data cleared

    5. Press Enter and then F10. In the dialog box that is displayed, select Yes and press Enter to save the configuration and restart the storage node, as shown in Figure 3-123.

      Figure 3-123  Saving the configuration and restarting the storage node

  27. During the system startup, the basic input/output system (BIOS) interface is displayed. Check the CPU information.
    1. If information similar to the following is displayed, press Delete repeatedly. The BIOS interface is displayed, as shown in Figure 3-124.

      Figure 3-124  BIOS startup page
      NOTE:

      If a dialog box that informs you of entering the password is displayed, enter the BIOS password (default: Admin@9000).

    2. The BIOS interface is displayed. View the CPU information and check whether the CPU is successfully installed, as shown in Figure 3-125.

      Figure 3-125  Viewing the CPU information
      NOTE:
      • If the displayed CPU information matches the actual CPU information, the CPU is successfully installed. Start the device.
      • If the CPU information is not displayed or is different from the actual CPU information, the CPU may not be properly installed. In this case, install the CPU again.

  28. Inspect the system using SmartKit. Choose Home > Storage > Routine Maintenance > More > Inspection to check the system status. For details, see the OceanStor 9000 V5 Routine Maintenance.

    • If all inspection items are successful: The inspection is successful.
    • If some inspection items fail the inspection: The inspection is failed. Rectify the faults by taking recommended actions in the inspection reports. You need to reperform inspection after rectifying. If the inspection is still failed, contact Huawei technical support.

Follow-up Procedure

After replacing the CPU, label the replaced CPU to facilitate subsequent operations.

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Updated: 2019-07-25

Document ID: EDOC1100067965

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