Users Guide

By default, the ECM feature is disabled on a chassis. The ECM enabling and disabling operations are
recorded in the CMC logs. The ECM mode state is maintained after CMC failovers and chassis AC power
cycles.
You can enable or disable the ECM feature using the CMC Web interface or the RACADM CLI interface.
Configuring Enhanced Cooling Mode for Fans Using Web Interface
To configure Enhanced Cooling Mode (ECM) for fans using CMC Web interface:
1. In the system tree, go to Chassis Overview, and then click Fans → Setup.
The Advanced Fan Configurations page is displayed.
NOTE: If ECM is disabled and all the fans in the chassis do not support ECM, then the Setup tab
to access the Advanced Fan Configurations page is not displayed.
2. In the Fans Configuration section, from the Enhanced Cooling Mode drop-down menu select
Enable or Disable.
For more information about the field descriptions, see the CMC Online Help.
NOTE:
The Enhanced Cooling Mode option is available for selection only if:
• All the fans in the chassis support ECM feature. In this case, you can enable or disable the ECM
mode.
• ECM is already enabled and the fan configuration is changed to Mixed Mode or all fans do not
support ECM mode. In this case, the ECM mode can be disabled, but cannot be enabled again
until all fans in the chassis support ECM.
NOTE: The Enhanced Cooling Mode and the Apply options are grayed out if:
• ECM mode is already disabled and fan configuration consists of unsupported fans along
with supported fans. The information section displays a message listing the fans that are
incompatible with ECM feature.
• ECM mode is already disabled and Max Power Conservation Mode (MPCM) is enabled. The
information section displays a message that ECM is not supported when MPCM is enabled.
For more information see the CMC Online Help.
If the ECM feature is disabled, you cannot enable the feature again until all fans in the chassis support
ECM.
3. Click Apply.
An operation successful message is displayed after the ECM option is successfully enabled or
disabled. The ECM mode does not get enabled if:
• The extra power required for supported fans is not available.
• Any of the fans in the chassis does not support ECM.
• MPCM is already enabled.
An alert message with the reason for ECM not getting enabled is displayed .
NOTE: If you try to enable MPCM when ECM is enabled, the ECM mode changes to enabled but
unsupported state.
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