Set the BIOS Boot Mode

The BIOS firmware supports both legacy boot mode and Unified Extensible Firmware Interface (UEFI) boot mode; the default setting is legacy boot mode. Some operating systems support both legacy BIOS and UEFI BIOS boot modes and some support legacy boot mode only.

The following Linux OS versions (or newer) support UEFI boot mode:

• Oracle Linux 6.x

• RHEL 6.x

• SLES 11.x

The following Linux OS versions do not support UEFI boot mode:

• Oracle Linux 5.x

• RHEL 5.x

• SLES 10.x

These are the options for setting the BIOS boot mode before installing the OS:

• If the OS supports legacy BIOS boot mode only, ensure that BIOS is set to legacy mode before you do the OS installation.

• If the OS supports both legacy BIOS and UEFI BIOS boot modes, you have the option of setting BIOS to either legacy BIOS boot mode or UEFI BIOS boot mode before you perform the OS installation.

1. Power on the server.

   POST messages appear on the console.

2. Watch the messages, and when the prompt appears, press F2 to access the BIOS Setup Utility.

   The BIOS Setup Utility main screen appears.

3. In the BIOS Setup Utility, use the left or right arrow keys to navigate to the Boot menu.

   The Boot Menu screen appears.

4. Use the down arrow key to select the UEFI/BIOS Boot Mode field.
5. Press Enter and use the up or down arrow keys to select the BIOS boot mode option.
6. To save the changes and exit the BIOS Setup Utility, press F10.

Next Steps

Installing the Operating System