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4.3.1 Precautions for replacement


4.3.1 Precautions for replacement
This section describes the precautions for replacement.
Precautions for motherboard unit replacement
  1. Do not replace the motherboard unit and the PSU backplane at the same time. If you replace the motherboard unit and the PSU backplane at the same time, the system may fail to operate correctly. Replace the motherboard unit or the PSU backplane, and then execute the showhardconf or showstatus command to verify that the replaced Field Replaceable Unit (FRU) is fully operational. Then, replace the other FRU.
  2. Do not mount and use any of the following microSD cards in the motherboard unit in another chassis:
    - the one currently mounted in the SPARC M10-1, or

    - one that was once used as a maintenance part

    This is because these microSD cards store device identification information.
  3. The CPU and XSCF on the motherboard unit cannot be replaced individually. Replace the motherboard unit.
  4. When replacing the motherboard unit, the memory should be removed from the old unit and remounted on the new unit. Always mount the memory modules in the same locations as they were mounted on the old motherboard unit.
  5. Before replacing the motherboard unit, execute the dumpconfig command to save the system setting information. When the motherboard unit is replaced, the CPU Activation setting information and CPU Activation key may be deleted. To restore the CPU Activation setting information and CPU Activation key that have been saved with the dumpconfig command, execute the restoreconfig command. For details, see "10.10 Saving/Restoring XSCF Settings Information" in the Fujitsu SPARC M12 and Fujitsu M10/SPARC M10 System Operation and Administration Guide.
  6. Set the system time.
    After replacement of the motherboard unit has been completed, set the system time. For details, see "Notes on Maintenance of a CPU Memory Unit, Motherboard Unit, XSCF Unit, PSU Backplane, or Crossbar Backplane Unit" in the Fujitsu M10/SPARC M10 Systems Product Notes for the latest XCP version.
  7. Check the XCP version.
    If you replace the motherboard unit and switch the microSD card, the CMU firmware versions displayed for the current and reserve XCPs by the version command do not match when you check the XCP firmware version after executing the testsb command. This does not affect system operation. If you start the system when the current and reserve XCPs have been switched, the CMU firmware stored on the microSD card is automatically applied.
  8. The type of motherboard unit varies depending on the number of CPU clocks.
  9. If you replace the microSD card along with the motherboard unit, dispose of the microSD card mounted on the old motherboard unit by appropriate means such as cutting it with cutting pliers. The old microSD card stores the user information, IP address, and other information set in the XSCF firmware.
Precautions for memory replacement
  1. When you replace a memory module, make sure that you install the new module in the same position as the original one.
Precautions for PSU backplane replacement
  1. If you replace the motherboard unit and the PSU backplane at the same time, the system may fail to operate correctly. Replace the motherboard unit or the PSU backplane, and then execute the showhardconf or showstatus command to verify that the replaced Field Replaceable Unit (FRU) is fully operational. Then, replace the other FRU.
  2. Do not mount and use any of the following PSU backplanes in another chassis:
    - the one currently mounted in the SPARC M10-1, or

    - one that was once used as a maintenance part

    This is because these PSU backplanes store device identification information.
  3. Set the system time.
    After replacement of the PSU backplane has been completed, set the system time. For details, see "Notes on Maintenance of a CPU Memory Unit, Motherboard Unit, XSCF Unit, PSU Backplane, or Crossbar Backplane Unit" in the Fujitsu M10/SPARC M10 Systems Product Notes for the latest XCP version.
Precautions for power supply unit replacement
Caution - Do not forcibly push the power supply unit into its slot. Using excessive force may damage the FRU and chassis.
  1. There are two power supply units. Thus, the system can continue operating even if one of the units fails. Do not, however, operate the system for an extended period while one unit has failed.
  2. When replacing multiple power supply units, replace one unit at a time. If redundancy of the power supply units cannot be secured, perform maintenance with the inactive/cold (system stopped) method.
  3. The type of power supply unit varies depending on the number of CPU clocks.
Precautions for fan unit replacement
  1. When you replace multiple fan units, do so one by one. If redundancy of the fan units cannot be secured, perform maintenance using the inactive/cold (system stopped) method.
  2. The fan units have a redundant configuration. Thus, the system can continue operating even if one of the fan units fails. Do not, however, operate the system for an extended period with one failed unit. Replace any failed fan unit immediately.
Precautions for PCIe card replacement
  1. Before replacing the PCIe card, stop the system and remove the PCIe riser from the motherboard unit.
Precautions for HDD backplane/operation panel replacement
Caution - When removing the HDD backplane and the operation panel, be careful not to damage electronic components such as connectors.