Lenovo 6241, Installation And Service Manual

Page: 151 / 1990

Step 3. Type the PASSWORD for the IMM and press Enter .
Step 4. At the system prompt, type your command.
Note: You can type help in the command prompt if you want to see a list of commands that you
can use.
Step 5. When you are finished, type Exit , to exit the session.
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.
Chapter 3
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Configuration information and instructions
137