7.2.3 Precautions for replacement
Notethe following points when you replace a CPU memory unit:
■Donot replace a CPU memory unit at the same time as the PSU backplane unit. If
youreplace both a CPU memory unit and the PSU backplane unit at the same
time,the system will fail to operate normally. Replace the CPU memory unit or
PSU backplane unit, and then confirm that the newly installed part operates
normallyby executing the showhardconf or showstatus command. Then, replace
theoth er Field Replaceable Units (FRUs).
■Whenreplacing the CPU memory unit, memory modules should be removed
from the old unit and remounted in the new one. Mount the new unit in the same
position as the old unit.
■Theweig ht of the CPU memory unit is 17 kg (37.4 lb). Maintenance must be done
bytwo peopleif the C PU memory unit is mounted at the 24 or higher U of the
rack.If you attempt to perform the maintenance work alone, you may injure
yourselfor cause damage to the chassis.
■Forboth the CPU memory unit upper and CPU memory unit lower, there are
eighttypes based on the combinations of CPU type and the number of memory
slots.Each type of CPU memory unit, both upper and lower, can be used in
combination with one another.
■Beforereplacing the CPU memory unit lower, execute the dumpconfig command
tosave the system setting information. When the CPU memory unit lower is
replaced,the C PU Activation setting information and CPU Activation keys may
bedeleted. To resto re the CPU Activation setting information and CPU Activation
keysthat have beensaved withthe dumpconfig c ommand, execute the restoreconfig
command.
■TheXCP firmware version must be the same before and after replacement of the
CPUmemory unit lower. For checking the version, see "4.2.2 Confirmingthe
software and firmware configurations."
7.2.4 Precautions for installation
Notethe following points when you expand a CPU memory unit upper:
■You need to add four PCIe cables when connecting the CPU memory unit upper
tothe CPU memory unit lower.
■The2-CPU configuration of the SPARC M10-4/M10-4S has four root complexes,
andthe 4-CPU configuration can have four, seven or eight root complexes. If you
changea 2-CPU configuration into a 4-CPU configuration by adding CPU
memoryunits on site, Fujitsu recommends a configuration with four root
complexes.This configuration inherits the configuration and mounting rules of
theI/O buso f the 2-CPU configuration. Adopting a configuration with seven or
eightr oot complexes increases the maximum number of mounted PCIe cards.
However, since the I/O bus is reconfigured, the physical partition needs to be
reconfigured.
Chapter7 Maintainingthe CPU Memory Units 87