Power Supply Redundancy; Environmental Monitoring - Sun Microsystems Sun Fire V215 Getting Started Manual

Power Supply Redundancy

Depending on the configuration, the Sun Fire V215 and V245 servers feature two
hot-swappable power supplies, enabling the system to continue operating should
one of the power supplies fail or if one power source fails.

Environmental Monitoring

The Sun Fire 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 indicators on the front and
back panel. 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.
All error and warning messages are sent to the service processor system console and
logged in the ALOM console log file. Service Required indicators 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 indicators.
If a power supply problem is detected, an error message is sent to the service
processor system console and logged in the ALOM console log file. Additionally,
status indicators located on each power supply light to indicate failures. The system
Service Required indicator lights to indicate a system fault.
22 Sun Fire V215 and V245 Servers Getting Started Guide • September 2006