About Server Features and Components
15
The server also supports a legacy version of the BIOS for use with software or
adapters that do not have UEFI drivers. The legacy version is the default.
The following sections provide more information on the UEFI BIOS modes:
■
“Boot Mode Selection” on page 15
■
“Legacy BIOS Boot Mode” on page 15
■
“UEFI BIOS Boot Mode” on page 15
Refer to the
Sun Server X3-2 Administration Guide,
“Using Legacy BIOS or UEFI” on
page 113
for more information about UEFI BIOS.
Boot Mode Selection
Two boot modes are available for BIOS: Legacy BIOS Boot Mode and UEFI BIOS Boot
Mode. UEFI BIOS can be configured to support either UEFI or Legacy BIOS Boot
Mode. However, some devices and operating systems do not yet support UEFI BIOS
and can boot only from Legacy BIOS 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 command
Save Changes and Reset. 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 the Oracle Integrated Lights Out Manager (ILOM) 3.1
Documentation Library at
http://www.oracle.com/pls/topic/lookup?ctx=
ilom31
.
Legacy BIOS Boot Mode
Choose Legacy BIOS Boot Mode to allow host bus adapters (HBAs) to use option
ROMs. Select Legacy BIOS Boot Mode when software or adapters do not have UEFI
drivers, or the system is using option ROM. Legacy BIOS Boot Mode is the default
boot mode.
In Legacy BIOS Boot Mode, only boot candidates that support Legacy BIOS Boot
Mode appear in the BIOS Setup Utility screens in the Boot Options Priority list.
UEFI BIOS Boot Mode
Choose UEFI BIOS Boot Mode to use UEFI drivers when software and adapters have
UEFI drivers. UEFI BIOS Boot Mode is manually selected during setup. For
instructions for making the selection, refer to the
Sun Server X3-2 Administration
Guide,
“Using Legacy BIOS or UEFI” on page 113
.
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