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Dell Chassis Management Controller Version 2.0 for PowerEdge FX2 and FX2s User's Guide

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Viewing information and health status of fans

CMC controls the speed of the chassis fan by increasing or decreasing the fan speed on the basis of system events. You can run the fan in three modes such as Low, Medium, and High (fan offset). For more information about configuring a fan, see the CMC for Dell PowerEdge FX2/FX2s Online Help.
To set up the properties of fans by using RACADM commands, type the following command at the CLI interface.
racadm fanoffset [-s <off|low|medium|high>]
For more information about the RACADM commands, see the Chassis Management Controller for PowerEdge FX2/FX2s RACADM Command Line Reference Guide available at dell.com/support/manuals.
NOTE The CMC monitors the temperature sensors in the chassis and automatically adjust the fan speed as needed. When overridden using this command, the CMC will always run the fan to the selected speed even though the chassis does not require the fans to run at that speed. However, you can override to maintain a minimum fan speed by the racadm fanoffset command.
CMC generates an alert and increases the fan speeds when the following events occur:
  • CMC ambient temperature threshold is exceeded.
  • A fan stops functioning.
  • A fan is removed from the chassis.
NOTE During updates of CMC or iDRAC firmware on a server, some or all of the fan units in the chassis rotates at 100%. This is normal.

To view the health status of fans, in the CMC Web interface, do any of the following:

  1. Go to Chassis Overview.
    The Chassis Health page is displayed. The upper right section of chassis graphics provides the top left view of the chassis and contains the health status of the fans. Fan health status is indicated by the overlay of the fan sub-graphic. Move the cursor over the fan sub-graphic. The text hint provides additional information about a fan. Click the fan sub-graphic to view the fan information in the right pane.
  2. Go to Chassis Overview > Fans.
    The Fans Status page provides the status, speed measurements in revolutions per minute (RPMs), and threshold values of the fans in the chassis. There can be one or more fans.
    NOTE In the event of a communication failure between CMC and the fan unit, CMC cannot obtain or display the health status for the fan unit.
    NOTE The following message is displayed when both the fans are not present in the slots or if a fan is rotating at a low speed:
    Fan <number> is less than the lower critical threshold.
    For more information, see the Online Help.

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