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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 CPU memory unit, PSU backplane unit, and memory replacement
Caution - The weight of the CPU memory unit is 17 kg (37.4 lb). If the mounting location in the rack is 24U or higher, the maintenance work must be done by two people. If you attempt to perform the maintenance work alone, you may injure yourself or cause damage to the chassis.
  1. Do not replace the CPU memory unit lower at the same time as the PSU backplane unit. If the CPU memory unit lower and the PSU backplane unit are replaced at the same time, the system may fail to operate normally. Replace either of the CPU memory unit lower and PSU backplane unit, and confirm that the replacement part operates normally by executing the showhardconf or showstatus command. Then, replace the other FRU.
  2. Do not mount and use any of the following microSD cards in the CPU memory unit lower in another chassis:
    - the one currently mounted in the SPARC M10-4/M10-4S, or

    - one that was once used as a maintenance part

    This is because these microSD cards store device identification information.
  3. Do not mount and use any of the following PSU backplane units in another chassis:
    - the one currently mounted in the SPARC M10-4/M10-4S, or

    - one that was once used as a maintenance part

    This is because these PSU backplane units store device identification information.
  4. The XSCF mounted in the CPU memory unit lower is not a FRU (field replaceable unit). When replacing the CPU memory unit lower, do not switch the XSCF units.
  5. When remounting memory during the replacement of the CPU memory unit or memory, be sure to remount the memory in it's original location before the replacement.
  6. To use the hardware RAID function, after replacing the CPU memory unit lower, you need to reactivate the hardware RAID volume. For details, see "14.2.11  Re-enabling a Hardware RAID Volume" in the Fujitsu SPARC M12 and Fujitsu M10/SPARC M10 System Operation and Administration Guide.
  7. Before replacing the CPU memory unit lower, execute the dumpconfig command to save the system setting information. If you replace the CPU memory unit lower, the CPU Activation setting information and CPU Activation key may be erased. To return the CPU Activation setting information and CPU Activation key to their original states, execute the restoreconfig command to restore the CPU Activation setting information and CPU Activation key saved beforehand using the dumpconfig 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.
  8. If you switch the microSD card when replacing the CPU memory unit lower, the maintenance time is shorter since the XSCF setting information is inherited. A check of the XCP firmware version after diagnosis of the system board may find that the CMU firmware versions do not match between the current XCP and reserve XCP. However, 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.
  9. If you replace the microSD card along with the CPU memory unit lower, dispose of the microSD card mounted on the old CPU memory unit lower 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.
  10. The type of CPU memory unit varies depending on the number of CPU clocks.
Precautions for power supply unit and fan unit replacement
Caution - Do not force the power supply unit or fan unit into its slot. Using excessive force may damage the FRU and chassis.
  1. The power supply units and cooling fans have redundant configurations. The system can operate even if one power supply unit or one cooling fan in a fan unit experiences a failure. However, avoid operating the system with a faulty power supply unit or a faulty cooling fan in one of the fan units for an extended period. Replace the unit containing the faulty power supply or faulty fan.
  2. When replacing multiple power supply units or fan units, replace one unit at a time. If redundancy of the power supply units or fan units cannot be secured, perform maintenance with the system stopped.
  3. The type of power supply unit or fan unit varies depending on the number of CPU clocks.
Precautions for PCIe card replacement
  1. For active maintenance using PHP, a multipath setting is necessary depending on the use of the PCIe cards.
  2. For active maintenance using PHP, confirm that the card supports PHP as described in "Appendix A  Cards That Support PCI Hot Plug and Dynamic Reconfiguration" in the Fujitsu M10/SPARC M10 Systems PCI Card Installation Guide. For active replacement combined with dynamic SR-IOV and the dynamic reconfiguration function for the PCIe end point, confirm the supported card as described in "Appendix B  Cards That Support SR-IOV" and "Appendix D  Cards That Support the Dynamic Reassignment Function for the PCIe End Point Device (PCIe Card)" in the same manual.
Precautions for operation panel replacement
  1. To replace the operation panel, remove the PSU backplane from the chassis.
  2. To replace the operation panel, set the BB-ID of the replacement operation panel to the same value as that before replacement.