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Chapter 3: Monitoring
3.3.1 Default Threshold Values
NOTE:
The threshold values listed below are used to trigger a warning event and sound
the alarm. A different value set is reserved for triggering the cooling fans to
operate at a high rotation speed. The fan speed value set is not user-configurable.
Table 3-8 shows the default threshold values for the subsystem. If any of these values
are surpassed the alarm will sound:
Upper Threshold Lower Threshold
+3.3V
+3.6V +2.9V
+5V
+5.5V +4.5V
+12V
+13.2V +10.8V
CPU Temperature
90ºC 5ºC
Board Temperature
80ºC 5ºC
Enclosure Ambient
Temperature
40ºC 0ºC
Table 3-8: Default Threshold Values
The controller self-monitoring thresholds in Table 3-8 are the default threshold
values. To change these pre-set values, please refer to the Generic Operation
Manual that came with your system. The values set for the subsystem’s ambient
temperature are pre-configured before shipping and cannot be changed.
3.3.2 Failed Devices
The audible alarm will be triggered if any of the following devices fail:
• Cooling fan modules
• PSU modules
• BBU modules
• Hard drives
• Components on the RAID controller
NOTE:
If the temperature exceeds a preset threshold, the BBU charger circuits will stop
charging. You will then receive a message that says “Thermal Shutdown/Enter
Sleep Mode.” When the temperature falls back within normal range, the battery
will resume charging.
3-9
Audible Alarm