Table of Contents
Advertisement
Figure 31. Fan speeds and temperature thresholds on the B08S
The low and high temperature thresholds enable the device to determine at which
speed the fans should operate. In general, the fans operate as follows:
v If the temperature of all thermal planes is between the low and high thresholds
v If the temperature of any thermal plane exceeds the high threshold specified for
v If the temperature of any thermal plane falls below the low threshold for a fan
If the temperature of any thermal plane exceeds the high temperature threshold for
any of the fan speeds, the software sends a message to the system log.
Table 20 outlines the default low and high temperature thresholds for each fan
speed, as well as the operating level and noise level of the fans at each fan speed.
Table 20. Fan speed, temperature thresholds and fan noise levels on the B08S
Fan Speed
Description
4
High
3
Medium
High temperature threshold
(shutdown temperature)
Low temperature threshold
HIGH
High temperature threshold
Low temperature threshold
MEDIUM
High temperature threshold
Low temperature threshold
MEDIUM-LOW
High temperature threshold
LOW
for a fan speed, the fan continues to operate at that fan speed.
a fan speed, the fan speed increases to the next higher speed. If the temperature
of any thermal plane exceeds the high threshold for the high speed and remains
above the threshold for five minutes, the system automatically shuts down to
prevent damage.
speed, the fan decreases its speed to the next lower speed. If the temperature of
any thermal plane falls below the high threshold for the low speed, the fan
operates at the low speed.
Low Temperature
Threshold
50° C
49° C
Fan Operating
High Temperature
Level (% of
Threshold
Capacity)
80° C
100
59° C
50
Chapter 5. Managing the Chassis and Modules
Fan Noise
Level
78 dB
66 dB
65
Advertisement
Table of Contents
