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Setting power supply power policy and system power configurations

This topic provides information about setting the power policy and system power configuration for the power supplies.

The server default power supply configuration setting, when shipped from the factory, is non-redundant mode with throttling enabled for both the ac and dc power supply models. If you want to change the mode to redundancy mode, you must use IMM2 web interface to set and change the power supply Power Policy and System Power Configurations options settings. You can set and change the policies and configurations using the IMM2 web interface, CIM, or the Advanced Settings Utility. You cannot set or change the Power Policy or System Power Configurations options setting using the UEFI Setup utility

If you do not adhere to the following information, it can cause errors or cause the server not to boot up (start).
  • The server supports the following power supply redundancy modes:
    • Non-Redundant
    • Fully Redundant
    • Redundant with Throttle
  • You must use IMM2 to set and change the Power Policy and System Power Configurations.
  • You cannot use UEFI to change Power Policy and System Power Configurations.
  • The power configurations and policies can be changed using IMM2 web interface, CIM, or Advanced Settings Utility (ASU).
  • Five N+N configurations are supported for 1+1 and 2+2 (as listed in the System power configuration screen on IMM2 web interface).
  • For redundancy, the input feeds must be wired with separate feeds to power supplies 1 and 3, and power supplies 2 and 4 (this is critical for mixed wattage).
  • The server will not boot if enough power is not available for the selected policy setting. This can occur if you select 2+2 1400W for the policy setting and one of the power supplies is 110 V ac.
  • The server will not boot when you mix (900W and 1400W) power supply wattage if the power supply slots are not balanced such as 1 and 3, and 2 and 4.
  • 1400W power supply is 1400W at high line (200 V ac), and only 900W at low line (100 V ac).
  • 900W power supply is 900W at both high line and low line.
  • For 900W ac and 750W dc, a mechanical spacer must be installed in the bay with the power supply.
  • Suggested power supply installation order is bay 2, 3, 1, then 4.
  • Power maximizer runs during system boot to verify that the available power meets the system load requirements.
  • 750W dc power supply is only supported in a four power supply configuration.
The following illustration is an example of the System power configuration setting in IMM2 for configuring ac power supplies for redundancy mode.
Note
When you change the power configuration settings, make sure you select a redundancy mode and then select the power supply system configuration that you want.

Example illustration of the system power configuration screen in IMM2

To log on to the IMM2 web interface, see Logging on to the IMM web interface.

After you log on to the IMM2 web interface, select the Server Management tab, then select the Power Management option to set and change power supply configurations information.

Note
The IMM2 user interface icons (green, yellow, and red) provide additional information when you move the cursor over the icons.

For more information on using IMM2 see the Integrated Management Module II User’s Guide at the Integrated Management Module II User’s Guide .