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Oracle® X4 Series Servers Administration Guide

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Updated: April 2016

Select UEFI Boot Mode or Legacy BIOS Boot Mode (BIOS)

image:Icon for BIOS

Your system supports both UEFI Boot Mode and Legacy BIOS Boot Mode.

Note -  The operating system can only boot with the boot mode property value that was initially set at installation. If you change the boot mode property value after installing the operating system, the operating system will become inoperable (will not boot). To resolve this issue, you must change the boot mode property value back to its initial setting.

To view or set the target boot mode on your server using the BIOS Setup Utility, follow these steps:

  1. Access the BIOS Setup Utility.
    1. Boot the system.

      Boot messages scroll across the console screen.

    2. Press the F2 key (or Ctrl +E from a serial terminal) continuously.

      The BIOS Setup Utility main screen appears.

  2. From the BIOS Main menu screen, select Boot.
  3. From the Boot screen, select UEFI/BIOS Boot Mode, and press Enter.

    The UEFI/BIOS Boot Mode dialog box appears.

    Note -  You cannot configure the boot order list after switching the boot mode. A system reboot is required to properly populate the boot order list with devices that support the chosen boot mode.

    image:BIOS screen showing selection of UEFI Boot Mode and Legacy BIOS                                 Boot Mode.
  4. Use the up and down arrows to select Legacy BIOS Boot Mode or UEFI Boot Mode, and then press Enter.
  5. To save the changes and exit the screen, press F10.

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