Windows Setup and Operation 3-33CHECK THE DUPLICATING OPERATION OFMODULESThis section describes how to check if the system runs properly after system installation orreinstallation. CPU/IO module has a processor function part and IO function part. Each partis monitored and managed by the module. In this section, the processor function part isreferred to as CPU module and IO function part PCI module.Evaluate Startup and Stop of PCI ModulesThis section describes how to confirm the continuous system operation by failover after stopping theprimary PCI module.1. Check which is the primary PCI module.The PCI module with the POWER switch illuminated is the primary module.2. Check whether the PCI modules are duplicated.To check if the PCI modules are duplicated, see the CPU/IO modules’ status LEDs.[ Indications of the status LEDs when PCI modules are duplicated]LED Primary Secondary1 CPU/IO module status LED1 - -2 CPU/IO module status LED2 Green Green3 DISK ACCESS LED Green blinking Green blinking* The numbers in the table correspond to the numbers in the above figure.The DISK ACCESS LED (3) lights when the hard disk drive is accessed.