Users Guide

Conguring power cap policy using web interface
To view and congure the power policies:
1.
In iDRAC Web interface, go to Overview → Server → Power/Thermal → Power Conguration → Power Conguration. The
Power Conguration page is displayed.
The Power Conguration page is displayed. The current power policy limit is displayed under the Currently Active Power Cap
Policy section.
2. Select Enable under iDRAC Power Cap Policy.
3. Under User-Dened Limits section, enter the maximum power limit in Watts and BTU/hr or the maximum % of recommended
system limit.
4. Click Apply to apply the values.
Conguring power cap policy using RACADM
To view and congure the current power cap values, use the following objects with the set command:
• System.Power.Cap.Enable
• System.Power.Cap.Watts
• System.Power.Cap.Btuhr
• System.Power.Cap.Percent
For more information, see the iDRAC RACADM Command Line Interface Reference Guide available at dell.com/idracmanuals.
Conguring power cap policy using iDRAC settings utility
To view and congure power policies:
1. In iDRAC Settings utility, go to Power Conguration.
NOTE: The Power Conguration link is available only if the server power supply unit supports power monitoring.
The iDRAC Settings Power Conguration page is displayed.
2. Select Enabled to enable the Power Cap Policy Else, select Disabled.
3. Use the recommended settings, or under User Dened Power Cap Policy, enter the required limits.
For more information about the options, see the iDRAC Settings Utility Online Help.
4. Click Back, click Finish, and then click Yes.
The power cap values are congured.
Conguring power supply options
You can congure the power supply options such as redundancy policy, hot spare, and power factor correction.
Hot spare is a power supply feature that congures redundant Power Supply Units (PSUs) to turn o depending on the server load.
This allows the remaining PSUs to operate at a higher load and eciency. This requires PSUs that support this feature, so that it
quickly powers ON when needed.
In a two PSU system, either PSU1 or PSU2 can be congured as the primary PSU. In a four PSU system, you must set the pair of
PSUs (1+1 or 2+2) as the primary PSU.
After Hot Spare is enabled, PSUs can become active or go to sleep based on load. If Hot Spare is enabled, asymmetric electrical
current sharing between the two PSUs is enabled. One PSU is awake and provides the majority of the current; the other PSU is in
sleep mode and provides a small amount of the current. This is often called 1 + 0 with two PSUs and hot spare enabled. If all PSU-1s
are on Circuit-A and all PSU-2s are on Circuit-B, then with hot spare enabled (default hot spare factory conguration), Circuit-B has
much less load and triggers the warnings. If hot spare is disabled, the electrical current sharing is 50-50 between the two PSUs, the
Circuit-A and Circuit-B normally has the same load.
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