Power Supply Unit; Cold Redundant Feature - NEC Express5800 Series User Manual

Chapter 2 Preparations
1.16

Power Supply Unit

This server can contain two power supply units. The server provides a redundant power configuration that
ensures continued operation of the system in the unlikely event one of the power supply units fails.
1.16.1

Cold redundant feature

The server supports the feature to optimize power efficiency as described below:
•
Cold redundant feature can run the system with optimum power efficiency by raising operating efficiency of
primary power supply unit and lowering that of redundant power supply unit in redundant power
configuration.
• If power efficiency of power units is not optimized due to system configuration, this feature is disabled
automatically.
Cold redundant feature can be used under the following conditions:
•
Two power supply units must be installed for redundant configuration.
•
See Chapter 2 (1. System BIOS) in "Maintenance Guide", change parameters as shown below, save the
settings and exit from SETUP.
Server → Power Control Configuration → Cold Redundant Mode → Enabled
Run SETUP again, and check if the status of Cold Redundant Mode shows Enabled in Server menu.
100
Tips
AC power supply unit has a cable tie to prevent AC cable from slipping out.
Express5800/R120g-1E User's Guide
1. Installing Internal Options