Selecting the boot mode

This server provides two Boot Mode configurations: UEFI Mode and Legacy BIOS Mode. Certain boot options require that you select a specific boot mode. By default, the boot mode is set to UEFI Mode. The system must boot in UEFI Mode to use certain options, including:
  • Secure Boot, UEFI Optimized Boot, Generic USB Boot, IPv6 PXE Boot, iSCSI Boot, and Boot from URL

  • Fibre Channel/FCoE Scan Policy


The boot mode you use must match the operating system installation. If not, changing the boot mode can impact the ability of the server to boot to the installed operating system.


When booting to UEFI Mode, leave UEFI Optimized Boot enabled.

  1. From the System Utilities screen, select System Configuration > BIOS/Platform Configuration (RBSU) > Boot Options > Boot Mode.
  2. Select a setting.
    • UEFI Mode (default)—Configures the system to boot to a UEFI compatible operating system.

    • Legacy BIOS Mode—Configures the system to boot to a traditional operating system in Legacy BIOS compatibility mode.

  3. Save your setting.
  4. Reboot the server.