Fujitsu SPARC M10-4 Service Manual page 345

Note -
18.6 Restoring the System
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18.6.1 Active/Hot maintenance
Connect the power cords to the power supply unit requiring maintenance.
Confirm that the LED (green) of the power supply unit is on.
Return to the operation of the XSCF firmware replacefru command to confirm
that the power supply unit has been incorporated into the system.
Execute the showstatus command to confirm that the power supply unit is
operating normally after the maintenance.
XSCF> showstatus
Execute the showhardconf command to check the hardware configuration
and the status of each component.
XSCF> showhardconf
Close the rack door.
18.6.2 System-stopped maintenance
Connect all the power cords to the power supply unit of the crossbar box
requiring maintenance.
Chapter 18 Maintaining the Power Supply Units of the Crossbar Box 321