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14 SPARC Enterprise T5120 and T5220 Servers Overview Guide • July 2009
Related Information
■ SPARC Enterprise T5120 and T5220 Servers Product Notes
■ SPARC Enterprise T5120 and T5220 Servers Administration Guide
■ SPARC Enterprise T5120 and T5220 Servers Service Manual
Environmental Monitoring
The SPARC Enterprise T5120 and T5220 servers feature an environmental monitoring
subsystem that protects the server and its components against:
■ Extreme temperatures
■ Lack of adequate airflow through the system
■ Power supply failures
■ Hardware faults
Temperature sensors are located throughout the system to monitor the ambient
temperature of the system and internal components. The software and hardware
ensure that the temperatures within the enclosure do not exceed predetermined safe
operation ranges. If the temperature observed by a sensor falls below a
low-temperature threshold or rises above a high-temperature threshold, the
monitoring subsystem software lights the amber Service Required LEDs on the front
and back panels. If the temperature condition persists and reaches a critical
threshold, the system initiates a graceful system shutdown. In the event of a failure
of the service processor, backup sensors protect the system from serious damage, by
initiating a forced hardware shutdown. The Service Required LEDs remain lit after
an automatic system shutdown to aid in problem diagnosis.
The power subsystem is monitored in a similar fashion by monitoring power
supplies and reporting any fault in the front and rear panel LEDs.
Related Information
■ SPARC Enterprise T5120 and T5220 Servers Product Notes
■ SPARC Enterprise T5120 and T5220 Servers Administration Guide
■ Integrated Lights Out Manager (ILOM) software documentation
■ Integrated Lights Out Manager (ILOM) 3.0 Supplement for SPARC Enterprise T5120
and T5220 Servers
■ SPARC Enterprise T5120 and T5220 Servers Service Manual