11 Controlling System Power

This section describes how to power on, power off, and reset the server.

Installation Procedure Overview

Oracle Integrated Lights Out Manager (ILOM)

Powering the Host On and Off

Your server has three power modes (states): Power off, Standby power, and Main power.

Caution:

Equipment damage. Do not disconnect power cords when the system is in Main power mode. Place the system in Standby power mode before disconnecting the power cords.

Caution:

Data loss. To prevent data loss, prepare the operating system for shutdown before you immediately power off.

Power State	Description	Indicators	Action
Power off	The server is completely powered off when the AC power cords are disconnected.	All indicators are off. The server is disconnected from all power sources.	Disconnect power cords to completely remove power.
Standby power	When the server is in Standby power mode, the service processor is powered on but the host is powered off.	The green System OK indicator blinks slowly. The green SP OK indicator is steady on.	If the server is completely powered off, plug in the power cords to apply Standby power. If the server is in Main power mode, use Oracle ILOM or the Power button to remove host power. You can power the host off gracefully, or immediately.
Main power	When you power on the host, the server enters Main power mode.	The green System OK indicator is steady on.	Use Oracle ILOM or the On/Standby button to apply host power.

For instructions on powering the host off and on, see the following procedures:

Power Off the Host Using the On/Standby Button

1. Locate the On/Standby button on the server front panel.
2. Press the On/Standby button.

   • To perform a graceful shutdown, press and release the Power button.

     ACPI-enabled operating systems perform an orderly shutdown. Operating systems that are not ACPI-enabled might ignore this event and fail to shut down the host.

     The System OK indicator blinks. The service processor SP OK indicator is steady on. The server goes into Standby power mode.

   • To perform an immediate shutdown, press and hold the On/Standby button for at least 5 seconds.

     The System OK indicator blinks. The service processor SP OK indicator is steady on. The server goes to Standby power mode.

     Caution:

     Data loss. An immediate shutdown abruptly closes all applications and files without saving changes.

   • To completely power off the server, disconnect the power cords from the back panel of the server.

Power On the Host Using the On/Standby Button

1. Verify that the server is in Standby power mode.

   In Standby power mode:

   • Host is powered off but the SP is powered on.

   • Power supplies are connected to a power source.

   • AC OK power supply indicators illuminate.

   • SP OK indicator is steady on.

   • System OK status indicator blinks slowly.

   See front and back panels in Server Features and Components.

2. Locate and press the On/Standby button on the front panel.

   With the power on:

   • Host boots and the server enters Main power mode.

   • System OK indicator goes steady on when the host is fully booted.

Power the Host On and Off Using Oracle ILOM

This procedure provides Oracle ILOM web interface and command-line interface (CLI) instructions to remotely power on or power off the host.

Caution:

Data loss. An immediate shutdown abruptly closes all applications and files without saving changes.

Note:

These commands affect power to the host but not to the SP. To completely power off the server, disconnect the power cords from the back panel of the server.

1. Control power using the Oracle ILOM web interface or the CLI.

   You must be logged on with Administrator privileges. For details, see Using Oracle Integrated Lights Out Manager (ILOM).

   • From the web interface:

     1. In the left pane, click Host Management → Power Control.

     2. From the Select Action list box, select one of the following:

        • Reset – Assert a power-cycle to the server, while keeping power applied to system components, such as storage drives.

        • Graceful Reset – Gracefully shut down the host operating system before you power cycle the server.

        • Immediate Power Off – Directly shut down the power to the server.

        • Graceful Shutdown and Power Off – Gracefully shut down the host operating system before you shut down the power to the server.

        • Power On – Apply full power to the system.

        • Power Cycle – Turn off system power to all system components and apply Main power to all system components.

     3. Click Save, and then click OK.

   • From the CLI, enter one of the following commands:

     • reset /SYSTEM

     • stop /SYSTEM

     • stop -f /SYSTEM

     • start /SYSTEM

   Refer to "Controlling Host Power", in the Oracle ILOM Administrator's Guide for Configuration and Maintenance at Servers Documentation Systems Management.

Resetting the Server

It is unnecessary to power the server off and on to reset the server because a reset maintains host power but causes the processors to reinitialize. During the reset process, the server retains some register information. This is important in case of a system host panic, as error information might be available upon system recovery.

Caution:

Possible Data Loss. Resetting the server causes any unsaved data on the server to be lost.

Note:

x86 Delay BIOS Firmware Option Can Cause a Longer Reset and Multiple Reboots. If the server has a pending BIOS upgrade, a routine reset will take longer to complete. The pending BIOS upgrade will cause the server to power cycle and reboot several times. This is expected behavior. If the upgrade includes an FPGA update, the process can take as long as 26 minutes to complete.

Note that a pending BIOS upgrade exists when both of these conditions are true: You updated the BIOS and SP firmware using Oracle ILOM. During the Oracle ILOM firmware update process, you selected Delay BIOS Upgrade.

Reset the Server Using Oracle ILOM

1. Log in to the Oracle ILOM web interface or command-line interface (CLI) using an account with admin (a) role privileges.
2. To reset the server:

   • From the web interface:

     1. In the left pane, click Host Management → Power Control, and select Reset from the Select Action list box.

     2. Click Save and click OK to reset the server.

   • From the CLI:

     1. Type the following command:

        -> reset /System

     2. When prompted, type y to confirm:

        Are you sure you want to reset /System (y/n)? y

        Performing hard reset on /System