System Management
7210 SAS M, X Basic System Configuration Guide Page 157
Component Redundancy
7210 SAS-Series component redundancy is critical to reduce MTTR for the system and primarily
consists of the following features:
• Redundant power supply — A power module can be removed without impact on traffic.
• Fan module — The fan module contains three fans. Failure of one or more fans does not
impact traffic.
• Hot swap — The power supply and fan module supports hot swapping.
Temperature Threshold Alarm and Fan Speed for 7210 SAS-M and 7210 SAS-X
In the 7210 SAS M and X devices, if the chassis temperature crosses a threshold of 58 degree
centigrade, the system raises an software alarm for over-termperature. When The temperature
reduces below 58 degree centigrade, the over-temperature alarm is cleared by the system. The
threshold temperature is not user configurable.
The Fan operates at two speeds- half speed and full speed. When the temperature of the chassis
increases above 42 degree centigrade the fan speed changes to full speed and when the
temperature decreases to 37 degree centigrade, the fan speed changes to half speed. These
thresholds are not user configurable.
Temperature Threshold Alarm and Fan Speed for 7210 SAS-M ETR variant
In the 7210 SAS-M ETR devices,if the chassis temperature crosses a threshold of 68 degree
centigrade , the system raises an software alarm for over-termperature. When the temperature
reduces below 68 degree centigrade, the over-temperature alarm is cleared by the system. The
threshold temperature is not user configurable.
The fan operates at three speeds - low-speed, half-speed and full-speed. When the temperature of
the chassis increases above 42 degree centigrade the fan speed changes to full speed and when the
temperature decreases to 37 degree centigrade the fan speed changes to half speed. When the
temperature falls below 8 degree centigrade the fan speed reduces to low-speed and it remains at
this speed until the temperature increases beyond 37 degree centigrade. These thresholds are not
user configurable.
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