Users Guide

NOTE: In the Enhanced Cooling Mode (ECM), the new generation fans provide superior cooling features when compared

to current generation fans of M1000e chassis. This increased cooling is not always needed and comes at the expense of

higher acoustics (where the system can sound up to 40% louder) and increased system fan power. You can enable or

disable the ECM feature on the basis of cooling required for a chassis.

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.

Configuring Enhanced Cooling Mode for Fans Using

RACADM

To enable and configure the Enhanced Cooling Mode for fans, use the following RACADM object under the cfgThermal group:

cfgThermalEnhancedCoolingMode

For example, to enable the ECM mode, use:

racadm config –g cfgThermal –o cfgThermalEnhancedCoolingMode 1

Configuring CMC