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Environment Monitoring and Control

To list current environmental status, temperatures, voltages, and fan status for the system, use the showenvironment -v command from the LOM shell on the SC. Fan 3 is the only fan that comes on when the system is in Standby mode. If Fan 3 indicates a fault, Fan 1 is the designated recovery fan. While in Standby mode, Fan 1 is stopped if Fan 3 recovers.

Pay particular attention to main Fan 6 and main Fan 7 because their failure can impact system availability. When installing the fan tray, make sure that the fan tray connector is fully engaged before you apply power to the system.

In a one system board configuration, the system board should be installed as SB0 because the system has a higher probability of surviving a main system fan failure. You can resolve the failure with no impact to system availability by using the hot-swap procedure.

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