When the system is fully configured, temperatures reported by the temperature sensors on the
LPUs, SFUs, and MPUs serve as the basis for fan speed adjustment. Table 1-115 lists general
principles.
Table 1-115 Fan Speed Adjustment Principles
Noise and Dissipation Standards
-5°C -
+27°C
(23°F -
80.6°F)
When fans rotate at a constantly low speed and the fans
meet heat dissipation requirements of a fully configured
system.
27°C -
40°C
(80.6°F -
104°F)
The fan speed is adjusted smoothly in linear mode,
without a sharp increase in noises.
Fans rotate at high speed to meet heat dissipation
requirements.
1.9.5.3 Fan Module
The fan modules, each containing one fan, are located side by side at the air exhaust vent. If a
single fan fails, the system can still work normally at an ambient temperature of 40°C (104°F)
for a short period of time.
Overview
Table 1-116 Fan attributes
Table 1-117 Mapping products and versions
Earliest Software Version
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