Oracle sun X4-8 Installation Manual page 28

UEFI BIOS
systems cannot boot in UEFI boot mode, so UEFI BIOS provides the ability to select between
UEFI and legacy boot modes. The default is legacy boot mode.
If you change boot modes, the boot candidates from the previous mode disappear. The
boot candidates from the new mode appear after you issue the BIOS Save Changes and
Reset command. Use the Oracle ILOM BIOS Backup and Restore function to preserve the
configuration in case you want to switch back. For information about Oracle ILOM, refer to
your Oracle Integrated Lights Out Manager (ILOM) documentation at:
com/goto/ILOM/docs.
The table below describes the BIOS boot modes.
Boot Mode
Legacy Boot Mode
UEFI Boot Mode
28 Sun Server X4-8 Installation Guide • December 2015
Description
Choose legacy boot mode to allow host bus adapters (HBAs) to use option
ROMs, when software or adapters do not have UEFI drivers, or the system is
using option ROM.
Legacy boot mode is the default boot mode. In legacy boot mode, only boot
candidates that support legacy boot mode appear in the BIOS Setup Utility
screens in the Boot Options Priority list.
Once you choose a boot mode and install an operating system, if you
Note -
reboot the server and select a different boot mode, the installed image is not
accessible and cannot be used.
Choose UEFI boot mode to use UEFI drivers when software and
adapters have UEFI drivers. UEFI boot mode is manually selected during
setup. For instructions for making the selection, refer to the Oracle x86
Administration Guide for X4 Series Servers at
goto/x86AdminDiag/docs.
In UEFI boot mode, only boot candidates that support UEFI boot mode
appear on the BIOS Setup Utility screens in the Boot Options Priority list.
The following list shows the minimum operating system versions required to
support UEFI boot mode:
■ Oracle Solaris 11.1
■ Oracle Linux 6.x
■ Red Hat Enterprise Linux 6.x
■ SUSE Linux Enterprise Server 11 SP3
■ Microsoft Windows Server 2008 R2 SP1 and Microsoft Windows Server
2012
■ VMware ESXi 5.x
All other operating systems must use legacy boot mode. For an up-to-date
list, refer to Sun Server X4-8 Product Notes.
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