Specifications

Chapter 3 Subsystem Monitoring
3.3.1 Default Threshold Values
Table 3-9 shows the default threshold values for the subsystem. If any of these values are
surpassed, the alarm will sound:
Parameter Upper Threshold Lower Threshold
+3.3V +3.6V +2.9V
+5V +5.5V +4.5V
+12V +13.2V +10.8V
Enclosure Ambient 40ºC 0ºC
CPU Temperature 90ºC 5ºC
Board Temperature 80ºC 5ºC
Table 3-9: Default Threshold Values
The thresholds in Table 3-9 are the default threshold values. To see how to change these
values, please refer to the Generic Operation Manual that came with your system.
3.3.2 Failed Devices
If any of the following devices fail, the audible alarm will be triggered:
 RAID controller module
 Cooling modules
 PSU modules
 BBU modules
 Hard drives
 Temperature sensors
3.4. I
2
C Monitoring
The PSUs, cooling modules, temperature sensors, and disk drive failure outputs are
monitored through an I
2
C serial bus. If any of these modules fails, you will be notified
through the various methods described above.
I2C Monitoring 3-9