Using UEFI
Using UEFI
The BIOS firmware controls the system from power-on until an operating system is booted.
The Oracle Exadata Storage Server X5-2 High Capacity contains a Unified Extensible
Firmware Interface (UEFI)-compatible BIOS that can be configured to support either UEFI
or Legacy BIOS modes. The BIOS can be configured to support either UEFI or Legacy BIOS
modes. Legacy BIOS is the default mode, and should be used with software and adapters that
do not have UEFI drivers
This section includes the following information:
■
“Selecting Legacy BIOS or UEFI Boot Mode” on page 183
■
“Switching Between Legacy BIOS and UEFI Boot Modes” on page 184
■
“UEFI Boot Mode Advantages” on page 184
■
“Configuration Utilities for Add-In Cards” on page 185
Selecting Legacy BIOS or UEFI Boot Mode
You can select either Legacy BIOS Boot Mode or UEFI Boot Mode. Legacy BIOS Boot Mode
is the default.
If you change BIOS boot modes, the boot candidates from the previously selected mode are
no longer available from the Boot Options Priority List in the BIOS Setup Utility. The boot
candidates from the new mode appear in the Boot Options Priority List only after you select
Save Changes and Reset from the BIOS Setup Utility menu. Use the Oracle ILOM BIOS
Backup and Restore function to preserve the BIOS configuration in case you want to switch
back to the previously selected mode. For information, refer to the Oracle Integrated Lights Out
Manager (ILOM) 3.2 Documentation Library at
http://www.oracle.com/goto/ilom/docs
All supported operating systems can use either UEFI Boot Mode or Legacy BIOS Boot Mode.
However, once you choose a boot mode and install an operating system, if you reboot the server
and select a different boot mode, the installed image can only be used in the mode in which
it was installed. For instructions for selecting either UEFI Boot Mode or Legacy BIOS Boot
“Select Legacy BIOS or UEFI BIOS Boot Mode” on page 188
Choose Legacy BIOS Boot Mode to allow host bus adapters (HBAs) to use option ROMs, and
when software or adapters do not have UEFI drivers. In Legacy BIOS Boot Mode, only boot
candidates that support Legacy BIOS Boot Mode appear in the Boot Options Priority List in the
BIOS Setup Utility.
Setting Up BIOS Configuration Parameters
183
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