Fujitsu M10-4 Service Manual page 73

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.
Do not mount and use any of the following microSD cards in the CPU memory
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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.
Do not mount and use any of the following PSU backplane units in another
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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.
The XSCF mounted in the CPU memory unit lower is not a FRU (field replaceable
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unit). When replacing the CPU memory unit lower, do not switch the XSCF units.
When remounting memory during the replacement of the CPU memory unit or
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memory, be sure to remount the memory in it's original location before the
replacement.
To use the hardware RAID function, after replacing the CPU memory unit lower,
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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.
Before replacing the CPU memory unit lower, execute the dumpconfig command
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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.
If you switch the microSD card when replacing the CPU memory unit lower, the
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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.
If you replace the microSD card along with the CPU memory unit lower, dispose
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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.
The type of CPU memory unit varies depending on the number of CPU clocks.
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Chapter 4 Preparation and Precautions for Maintenance 59