HP Integrated Lights-Out 3 - Manual (Page 144)

Graceful shutdown
The ability of the iLO processor to perform a graceful shutdown requires cooperation from the
operating system. To perform a graceful shutdown, the iLO health driver must be loaded. iLO
communicates with the health driver and uses the appropriate operating system method of shutting
down the system safely to ensure that data integrity is preserved.
If the health driver is not loaded, the iLO processor attempts to use the operating system to perform
a graceful shutdown through the power button. iLO emulates a physical power-button press (iLO
momentary press) in order to prompt the operating system to shut down gracefully. The behavior
of the operating system depends on its configuration and settings for a power-button press.
For more information about the iLO drivers, see “Installing the iLO drivers” (page 22) .
When using Windows Server 2003 or later, the computer group policy disables a graceful system
shutdown via a momentary press unless an Administrator is logged into the operating system. To
change this setting and enable a graceful shutdown, do the following:
1.
From a command prompt, execute the gpedit.misc command.
2. Set the following setting to Enabled: Computer Configuration
→Windows Settings→Security
Settings
→Local Policies→Security Options→Shutdown: Allow system to be shut down without
having to log on.
Power efficiency
iLO enables you to improve power usage by using High Efficiency Mode. HEM improves the power
efficiency of the system by placing the secondary power supplies in step-down mode. When the
secondary supplies are in step-down mode, the primary supplies provide all DC power to the
system. The power supplies are more efficient because there are more DC output watts for each
watt of AC input.
NOTE: HEM is available on nonblade servers only.
When the system draws more than 70% of the maximum power output of the primary supplies,
the secondary supplies return to normal operation (that is, they exit step-down mode). When power
use drops below 60% capacity of the primary supplies, the secondary supplies return to step-down
mode. HEM enables you to achieve power consumption equal to the maximum power output of
the primary and secondary power supplies, while maintaining improved efficiency at lower
power-usage levels.
HEM does not affect power redundancy. If the primary supplies fail, the secondary supplies
immediately begin supplying DC power to the system, preventing any downtime.
You must configure HEM through the system RBSU. You cannot modify these settings through iLO.
For more information, see the HP ROM-Based Setup Utility User Guide.
The configured HEM settings are displayed on the System Information
→Server Power page.
Using iLO Power Management
iLO Power Management enables you to view and control the power state of the server, monitor
power usage, and modify power settings. The Power Management menu has three options: Server
Power, Power Meter, and Power Settings.
Managing the server power
The Virtual Power Button section on the Server Power page displays the current power state of the
server, as well as options for remotely controlling server power. System Power indicates the state
of the server power when the page is first opened. The server can be ON, OFF, or Reset. Use the
browser refresh feature to view the current server power state.
The server is rarely in the Reset state.
144 Using iLO