- Network Parameters
- Critical OpenBoot PROM Configuration Parameters
- Time and Date
- Host Watchdog, Rocker Switch, and Secure Mode Settings
- Password Management
- Firmware Upgrades
- Error Logging
- Error Analysis
- LED Status and Alarms
- Environment Monitoring and Control
- Console Navigation
- Power Failure and Recovery Behavior
- Precautions for Using the SCC
- System Controller Configuration Backups
- Power Connections for Redundancy and Grounding
- Rackmounting and Improving Serviceability
- About the Author
- Ordering Sun Documents
- Accessing Sun Documentation Online
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.