The server UEFI firmware supports both Legacy Boot Mode and UEFI Boot Mode. Legacy Boot Mode is enabled by default . Because all supported Linux operating systems support both Legacy BIOS and UEFI, you have the option of setting the boot mode to either Legacy or UEFI before you perform the OS installation.
For example, to reset the server, do one of the following:
From the local server, press the Power button on the front panel of the server (for approximately 1 second) to turn the server off, then press the Power button again to power on the server.
From the Oracle ILOM web interface, click Host Management → Power Control, select Reset from the Select Action list box, then click Save.
From the Oracle ILOM CLI, type: reset /System
The server begins the boot process and the BIOS screen appears.
[Setup Selected] and the Boot Mode (Legacy or UEFI) are displayed at the bottom of the BIOS screen, then the BIOS Setup Utility appears.
The Boot Menu screen appears. The UEFI/BIOS Boot Mode field displays the current boot mode.
You must select the boot mode before starting the operating system installation.
Alternatively, you can select Save Changes and Exit from the Exit menu.