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4. Insert the new power supply assemblies.
5. Power on the power supply assemblies.
6. Verify the power supply assemblies' OK and FAIL status LEDs.
Time and items required
Installing or removing and replacing a power supply assembly should require less than five minutes to
complete.
The following items are required to replace a power supply assembly:
• New power supply assembly (must have the same airflow direction as the power supply assembly being
replaced)
Recording power supply assembly critical information
You can use the following commands to record the power supply assembly configuration and operations
information:
• chassisshow
• fanshow
• psshow
• historyshow
• tempshow
• sensorshow
Refer to theFabric OS Command Reference for output examples and descriptions.
Removing a power supply assembly
Complete the following steps to remove a faulty power supply assembly.
1. To leave the device in service while removing a power supply assembly, verify that the other power
supply assembly (the one not being replaced) has been powered on for at least four seconds and has a
steady green LED.
58 IBM Storage Networking SAN128B-7: SAN128B-7 Installation, Service, and User Guide
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