Owner's Manual

Using the CMC Web Interface 147
CMC, which controls fan speeds, automatically increases or decreases fan
speeds based on system wide events. CMC
generates an alert and increases the
fan speeds
when the following events occur:
• CMC ambient temperature threshold is exceeded.
• A fan fails.
• A fan is removed from the chassis.
To view the health status of the fan units:
1
Log in to the CMC Web interface.
2 Select Fans in the system tree.
The
Fans Status page is displayed.
You can also view the Fan Status page by clicking the status link in the fan
information Quick Links on the right side of the page.
Table 5-33. Fans Health Status Information
Item Description
Name Displays the fan name in the format FAN-n, where n is the fan
number.
Present Indicates whether the fan unit is present (Yes or No).
Health OK Indicates that the fan unit is present and
communicating with CMC. In the event of a
communication failure between CMC and the
fan unit, CMC cannot obtain or display health
status for the fan unit.
Critical Indicates that at least one Failure alert has
been issued. Critical status represents a system
failure on the fan unit, and corrective action
must be taken immediately to prevent
overheating and system shutdown.
Unknown Displayed when the chassis is first powered on.
In the event of a communication failure
between CMC and the fan unit, CMC cannot
obtain or display health status for the fan unit.
Speed Indicates the speed of the fan in RPM.