Precautions For Installation; Precautions For Removal - Fujitsu M10-4 Service Manual

keys that have been saved with the dumpconfig command, execute the restoreconfig
command.
If you replace the CPU memory unit lower and switch the microSD card, the CMU
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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.
7.2.4

Precautions for installation

Note the following points when you expand a CPU memory unit upper:
If PCIe cables are not connected to the CPU memory unit lower, you need to add
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four PCIe cables.
If PCIe cables are connected to the CPU memory unit lower, you need to add only
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one PCIe cable.
The 2-CPU configuration of the SPARC M10-4/M10-4S has four root complexes,
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and the 4-CPU configuration can have four, seven or eight root complexes. If you
change a 2-CPU configuration into a 4-CPU configuration by adding a CPU
memory unit upper on site, Fujitsu recommends a configuration with four root
complexes. This configuration inherits the configuration and mounting rules of
the I/O bus of the 2-CPU configuration. Adopting a configuration with seven or
eight root complexes increases the maximum number of mounted PCIe cards.
However, since the I/O bus is reconfigured, the physical partition needs to be
reconfigured.
A root complex consists of an I/O controller on a processor, PCI switches, and PCI
devices under the I/O controller.
For SPARC M10-4/M10-4S with two CPUs installed, if a CPU memory unit upper
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is installed for expansion to add two CPUs when the I/O bus reconfiguration is
"enabled," it will change the device paths of the I/O devices that have been used.
Before adding the memory unit, execute the setpparmode command by specifying
"false" for ioreconfigure with the -m function=mode option to "disable" the I/O bus
reconfiguration function.
7.2.5

Precautions for removal

Note the following points when you reduce a CPU memory unit upper:
Remove the shortest PCIe cable that connects the CPU memory unit upper and
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CPU memory unit lower. However, you do not need to remove the three PCIe
cables that are connected to the CPU memory unit lower.
If a CPU memory unit upper is removed to remove two CPUs, it will eliminate the
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root complexes for the two CPUs in use up to then, making some PCIe slots
unavailable. To make the PCIe slots available, execute the setpparmode command
by specifying "true" or "nextboot" for ioreconfigure with the -m function=mode
option to "enable" the I/O bus reconfiguration function. Since the I/O bus is
Fujitsu M10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual ･ February 2014
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