The Sun Server X3-2 contains a Unified Extensible Firmware Interface (UEFI)-compatible BIOS that provides more boot options and configuration capability for adapter cards than previous versions of the BIOS.
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:
Refer to the Administration, Using Legacy BIOS or UEFI for more information about UEFI BIOS.
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.
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.
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 Administration, Using Legacy BIOS or UEFI.
In UEFI BIOS Boot Mode, only boot candidates that support UEFI BIOS Boot Mode appear on the BIOS Setup Utility screens in the Boot Options Priority list.
Currently, the following operating systems support UEFI BIOS Boot Mode. For updates to this list, refer to Sun Server X3-2 Product Notes at http://www.oracle.com/pls/topic/lookup?ctx=SunServerX3-2.
Oracle Solaris 11.1
Oracle Linux 6.x
Red Hat Enterprise Linux 6.x
SUSE Linux Enterprise Server 11 SP2
Microsoft Windows Server 2008
VMware ESXi 5.x
These operating systems can use either UEFI BIOS Boot Mode or Legacy BIOS Boot Mode. All other operating systems must use 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 is not accessible and cannot be used.