Oracle X5-2 User Manual

Legacy BIOS and UEFI
Legacy BIOS and UEFI
The Oracle Server X5-2 is equipped with a Unified Extensible Firmware Interface-compatible
BIOS (UEFI BIOS) that can be configured to support either UEFI or Legacy BIOS boot modes.
Legacy BIOS is the default mode. Some operating systems cannot boot in UEFI Boot Mode, so
the UEFI BIOS provides the ability to select between UEFI and Legacy boot modes.
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 X5 Series Servers
Administration Guide at https://www.oracle.com/goto/x86admindiag/docs.
Most 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, 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 Mode, refer to “Using UEFI” in Oracle Server X5-2 Service
Manual.
The following operating systems supported by the Oracle X5-2 Server can use either UEFI Boot
Mode or Legacy BIOS Boot Mode:
■
Oracle Solaris
■
Oracle Linux
■
Windows Server
■
VMware ESXi
■
SUSE Linux Enterprise Server
The following operating system only uses Legacy BIOS Boot Mode:
■
Oracle VM software
The table below describes the BIOS boot modes.
Boot Mode Description
Legacy BIOS Boot Mode Choose Legacy BIOS Boot Mode to enable host bus adapters (HBAs) to use option ROMs, and when software
or adapters do not have UEFI drivers.
Legacy BIOS is the default boot mode. 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.
36 Oracle Server X5-2 Installation Guide • January 2021

Oracle X5-2 Specifications

General

Number of Processors	2
Cores per Processor	Up to 18
Form Factor	2U Rackmount
Processor	Intel Xeon E5-2600 v3
Memory	Up to 768 GB DDR4
Power Supply	1200W
Operating System	Oracle Linux, Oracle Solaris
Network	4 x 10Gb Ethernet ports