Removing and replacing a midplane assembly: SAN Volume Controller 2145-SV2 and 2145-SA2

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A trained service provider can use this procedure to replace a faulty midplane with a new one received from stock. Ensure that your midplane assembly is replaced only by a trained service provider.

About this task

DANGER
When working on or around the system, observe the following precautions:

Electrical voltage and current from power, telephone, and communication cables are hazardous. To avoid a shock hazard:

  • If IBM® supplied a power cord(s), connect power to this unit only with the IBM provided power cord. Do not use the IBM provided power cord for any other product.
  • Do not open or service any power supply assembly.
  • Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
  • The product might be equipped with multiple power cords. To remove all hazardous voltages, disconnect all power cords.
  • Connect all power cords to a properly wired and grounded electrical outlet. Ensure that the outlet supplies proper voltage and phase rotation according to the system rating plate.
  • Connect any equipment that will be attached to this product to properly wired outlets.
  • When possible, use one hand only to connect or disconnect signal cables.
  • Never turn on any equipment when there is evidence of fire, water, or structural damage.
  • Disconnect the attached power cords, telecommunications systems, networks, and modems before you open the device covers, unless instructed otherwise in the installation and configuration procedures.
  • Connect and disconnect cables as described in the following procedures when installing, moving, or opening covers on this product or attached devices.
    To disconnect:
    1. Turn off everything (unless instructed otherwise).
    2. Remove the power cords from the outlets.
    3. Remove the signal cables from the connectors.
    4. Remove all cables from the devices.
    To connect:
    1. Turn off everything (unless instructed otherwise).
    2. Attach all cables to the devices.
    3. Attach the signal cables to the connectors.
    4. Attach the power cords to the outlets.
    5. Turn on the devices.
  • Sharp edges, corners and joints might be present in and around the system. Use care when handling equipment to avoid cuts, scrapes and pinching. (D005)
Attention:
  • The node midplane assembly must be replaced only by a trained service provider. Complete this procedure only if instructed to do so by a service action or the IBM Support center.
  • Replacing the midplane assembly of a node involves shutting down the node. If the node is in a correctly configured I/O group, the second node in the I/O group continues to operate and handle I/O for the I/O group.
  • When you replace hardware components in the back of the node, ensure that you do not inadvertently disturb or remove cables that you are not instructed to remove.
  • Ensure that you are aware of procedures for handling static-sensitive devices before you remove the node.

Procedure

  1. Log in to the service assistant on the node canister in the node. In the Node Details panel, select the Location tab. Note the following values for the node in Table 1. This information might be needed later.
    Table 1. Recording node information
    Item Value
    WWNN 1  
    WWNN 2  
    Machine type and model  
    Serial number  
  2. If the node is still active, stop host I/O, FlashCopy®, Global Mirror, or Metro Mirror activities on all the volumes that depend on the node.

    This step applies to all I/O group volumes that are managed by this node. It also applies to any volumes in other I/O groups that depend on the drives in the affected I/O group.

  3. Complete Procedure: Powering off the node canister: 2145-SV2 and 2145-SA2 for the node canister that requires the midplane assembly replacement.

Removing the midplane assembly

  1. Disconnect both power cables from the rear of the node.
  2. Write down the port and cable connections before you disconnect all cables from the ports rear of the node. Use Table 2 and Table 3 to record the information for the node canister.
    Note: Depending on your system configuration, some PCIe adapter ports and Ethernet ports might not be connected.
    Table 2. Summary of node canister PCIe slots and port connections
    PCIe slot 1 PCIe slot 2 PCIe slot3
    Port 1 Port 2 Port 3 Port 4 Port 1 Port 2 Port 3 Port 4 Port 1 Port 2 Port 3 Port 4
                           
                           
    Table 3. Summary of node canister Ethernet ports
    Port 1 Port 2 Port 3 Port 4
           
           
  3. Remove the two power supplies from the node, as described in Removing and replacing a power supply unit: 2145-SV2 and 2145-SA2.
  4. Remove the two power interposers from the node, as described in Removing and replacing a power interposer: 2145-SV2 and 2145-SA2.
  5. Remove the node canister from the node, as described in Removing and replacing the node canister in the node: 2145-SV2 and 2145-SA2.
  6. Remove the fascia from the node, as described in Removing and replacing the fascia: 2145-SV2 and 2145-SA2.
  7. Remove the three EMC shields from the node, as described in Removing and replacing an EMC shield: SAN Volume Controller 2145-SV2 and 2145-SA2.
  8. Remove the four M5 screws from the front of the node to free the node from the rack.
    Figure 1. Location of the screws on the front of the node
    Location of the screws on the front of the node
  9. Carefully slide the node from the rack.
  10. Place the node on a work surface, so that the underside of the node faces upward, and the node front is facing toward you.
  11. Remove the nine screws from under the front of the node (see Figure 2).
    Figure 2. Location of the screws on the underside of the node
    Location of the screws on the bottom of the node
  12. Turn the node over so that the top of the node is facing upward, and the front is facing towards you.
  13. Remove the five screws from the top of the node.
  14. Remove the four screws on the right side that secure the midplane assembly to the node.
  15. Remove the four screws on the left side that secure the midplane assembly to the node.
  16. Remove the midplane assembly from the chassis by rotating up the midplane assembly to about 45°. Then, withdraw the midplane assembly from the front of the node.
    Figure 3 shows the front of the node with the midplane assembly removed; the screw locations are also shown.
    Figure 3. Midplane assembly removed from the node
    node after the midplane assembly was removed.

Replacing the midplane assembly

  1. Unpack the replacement midplane assembly. Locate the pack of replacement screws that comes in the package. The package includes 24 screws, but only 22 screws (shown in Figure 4) are used to secure the node chassis.
    Figure 4. Midplane assembly screws
    node after the midplane assembly was removed.
  2. Hold the midplane assembly the correct way up; ensure the drive bays face toward you.
  3. Insert the midplane assembly into the front of the node at 45° angle. Then, rotate it down into the front of the node so that the screw holes in the midplane assembly align with the screw holes in the node.
  4. Secure the midplane assembly to the node chassis on the right and left sides by using four screws each side to replace the screws that were removed in steps 17 and 18.
  5. Secure the top of the node chassis with five screws to replace those that were removed in step 16.
  6. Turn over the bottom of the node to face upward; then, insert nine screws on the bottom of the node to replace those that were removed in step 14.
  7. Reinstall the node in the rack cabinet, securing it with the screws that were removed at step 11.
  8. Reinstall the three EMC shields onto the node, as described in Removing and replacing an EMC shield: SAN Volume Controller 2145-SV2 and 2145-SA2.
  9. Replace the fascia onto the node, as described in Removing and replacing the fascia: 2145-SV2 and 2145-SA2.
  10. Reinstall the node canister, as described in Removing and replacing the node canister in the node: 2145-SV2 and 2145-SA2.
  11. Reinstall the power interposers, as described in Removing and replacing a power interposer: 2145-SV2 and 2145-SA2.
  12. Reinstall the two power supplies, as described in Removing and replacing a power supply unit: 2145-SV2 and 2145-SA2.
  13. Reconnect the data cables to the same connectors at the rear of the node. Use the data that you collected in step 5.
  14. Reconnect power to the node.

    The node canister restarts. The yellow fault LED indicators are on because the new node was not set with the identity of the old node. The node canister logs node error 504 to report that it is in the wrong location. In the system Event log, the error code is 1192.

  15. Use an ssh client to log in as the superuser to the service IP address of the node canister. Then, access the service assistant CLI.
  16. Enter the satask chvpd -replacemidplane command.

    If the command is successful, the node canister modifies the VPD data. You are disconnected from the CLI as the node canister reboots.

    If the satask chvpd -replacemidplane command fails, complete the following steps:

    1. Connect to the Service Assistant Tool of the node canister. Go to http://service_ip/service or connect to the technician port of the node canister.
    2. In the Service Assistant tool, use the Configure node panel.
    3. Select to use the node copy of the data that you recorded in step 1 (WWNN 1, WWNN 2, machine type and model, and serial number).

      If the node copy for any of the values is not available, select the Specify option for each missing value. Then, enter the value that you recorded at step 1 .

    4. After you specify all values in the node Information panel, click Modify.

      The node canister restarts. When the restart finishes, the system comes online.

      Important:
      • Do not reset the system ID.
      • After the replacement midplane is modified, it cannot be used as a replacement part for a different node. Do not return a modified midplane assembly to FRU stock.
  17. Wait for the green status LED to light and indicate that the node canister is active in the system.

Note: Customers can complete the following tasks after the new midplane is installed and the node is operating again.

  1. Use the management GUI to check the status of all volumes and physical storage to ensure that the system is operating normally.
  2. Go to Monitoring > Events to check the Event Log for other events or errors.
  3. Restart the host application and any FlashCopy, Global Mirror, or Metro Mirror activities that were stopped.