ILOM 3.0 - How is the host's last/auto power-on state determined? How do you configure host power-on on boot?

Asset ID:	1-71-1346494.1
Update Date:	2011-08-08
Keywords:

Solution Type Technical Instruction Sure

Solution 1346494.1 : ILOM 3.0 - How is the host's last/auto power-on state determined? How do you configure host power-on on boot?

Applies to:

Sun Fire X4170 Server - Version: Not Applicable and later   [Release: N/A and later ]
Sun Fire X4170 M2 Server - Version: Not Applicable and later    [Release: N/A and later]
Sun Fire X4270 Server - Version: Not Applicable and later    [Release: N/A and later]
Sun Fire X4270 M2 Server - Version: Not Applicable and later    [Release: N/A and later]
Sun Fire X4275 Server - Version: Not Applicable to Not Applicable   [Release: N/A to N/A]
Information in this document applies to any platform.

Goal

What settings determine the host's last/auto power-on state? How do you configure host power-on on boot?

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Solution

The ILOM on the Service Processor on newer platforms has power management features which include the following properties. These properties determine whether the system or host remains off or auto powers on after a power loss and reinstatement.

HOST_AUTO_POWER_ON
HOST_LAST_POWER_STATE

-> ls /SP/policy -d properties
/SP/policy
   Properties:
       HOST_AUTO_POWER_ON = disabled
       HOST_LAST_POWER_STATE = disabled

Legacy systems like the Sun Fire X4150 have "Restore on AC power loss" setting in the BIOS.
This BIOS setting determines the host's power-on state on a reboot and can be accessed in the following way.

A) Reboot HOST, and press F2 enter the BIOS setup menu.
B) Go to Chipset->South Bridge Configuration, Check the setting of Restore on AC Power Loss, Server--> Restore on AC power loss -> Select the value form the List.

On newer systems like the Sun Fire X4170 M2, this policy setting has been removed from the BIO. The end user may only use the SP to manage the host's last/auto power-on state.

Enabling HOST_AUTO_POWER_ON enables the host to auto power-on on boot. Enabling this policy overrides the setting of the HOST_LAST_POWER_STATE policy.

Enabling HOST_LAST_POWER_STATE enables the host to power to the last power state on boot. Enabling this policy overrides the HOST_AUTO_POWER_ON policy.

The default settings in the ILOM for both these policies is 'disabled'.

Please refer to 'Power Management Policies' in the ILOM 3.0 supplement for your platform - available in the Oracle x86 Servers Documentation - for additional details on how to configure these settings.

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