Fujitsu M10-4 - Page 62

unit, or memory:
■
Do not replace the CPU memory unit lower at the same time as the PSU backplane
unit. If you replace both the CPU memory unit lower and the PSU backplane unit
at the same time, the system may fail to operate normally. Either of the XSCF unit
mounted in the CPU
memory unit lower or the PSU backplane unit must remain
mounted, since they store device identification information. 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.
■
When remounting memory in the work of replacing the CPU memory unit or
memory, be sure remount the memory in same location as that before replacement.
■
The weight of the CPU memory unit is 17 kg (37.4 lb). If the mounting location in
the rack is 24U or higher, be sure that two people perform the work. If you
attempt to perform the maintenance work alone, you may injure yourself or cause
damage to the chassis.
■
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 M10/SPARC M10 Systems
System Operation and Administration Guide.
■
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 Setting
Information" in the Fujitsu M10/SPARC M10 Systems System Operation and
Administration Guide.
■
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.
Note the following points when replacing a power supply unit or fan unit:
■
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.
■
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.
■
Do not force the power supply unit or fan unit into its slot. Using excessive force
may damage the FRU and chassis.
■
The type of power supply unit or fan unit varies depending on the number of
Fujitsu M10-4/Fujitsu M10-4S/SPARC M10-4/SPARC M10-4S Service Manual
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November 201448