Set the Boot Mode
The server can be configured to boot in either Legacy BIOS Boot Mode (default) or UEFI Boot
Mode. Legacy BIOS Boot Mode is enabled by default.
Because Windows Server 2012 and 2012 R2 operating systems support
both Legacy BIOS and UEFI, you have the option of setting the boot mode to
either Legacy BIOS Boot Mode or UEFI Boot Mode before you perform the OS
After you have the installed Windows Server operating system, if you
decide you want to switch from Legacy BIOS Boot Mode to UEFI Boot Mode, or
vice versa, you must reinstall the operating system.
Before You Begin
Ensure that the following requirements are met:
or power on the server.
For example, do one of the following:
From the local server, press the Power button
(approximately 1 second) on the front panel of the server to turn
the server off, and then press the Power button again to power on
From the Oracle ILOM web interface, click Host Management
→ Power Control , select Reset from the Select Action list box,
and then click Save.
From the Oracle ILOM CLI, type: reset /System
The server begins the boot process and the BIOS screen appears.
The BIOS screen might take a while to appear. Please be patient.
The next events occur very quickly; therefore, focused attention is needed for the following
steps. Watch carefully for these messages as they appear on the screen for a brief time. You might
want to enlarge the size of your screen to eliminate scroll bars.
- When prompted in the BIOS screen, press the F2 key to access the BIOS Setup Utility.
After a few moments, the BIOS Setup Utility appears.
In the BIOS Setup Utility, use the arrow keys to navigate to the Boot menu.
The Boot menu screen appears.
The options in the boot order list differ depending on the storage drive configuration and
whether you have enabled the Persistent Boot Support feature. For more information about Persistent
Boot Support, refer to the Oracle X5 Series Servers Administration Guide
Use the down arrow key to select the UEFI/BIOS Boot Mode
field, and then press Enter.
Select your preferred boot mode, and then press Enter.
To save changes and exit BIOS, press the F10 key.
You must select the desired boot mode, Legacy BIOS Boot Mode or UEFI
Boot Mode, before starting the operating system installation.