If you requested that the Oracle Solaris operating system (OS) be preinstalled on your server when you ordered the server, Oracle Solaris 11.1 was preinstalled at the factory. If the Oracle Solaris OS is preinstalled on your server, but you do not want to use it, you can install any other supported operating system or virtual machine software on your server. For an updated list of operating systems supported by the server, see the latest version of the Sun Server X4-2L Product Notes at http://www.oracle.com/goto/X4-2L/docs. You can also view a list of supported operating systems at http://wikis.oracle.com/display/SystemsComm/Sun+Server+X4-2L+-+Operating+Systems.
Note - If the Oracle Solaris 11.1 OS was preinstalled, it was installed with the server set to Legacy BIOS. If you choose to boot the server in UEFI BIOS Boot Mode, the preinstalled image is not accessible. Therefore, if you want to use the Oracle Solaris 11.1 OS with the UEFI/BIOS Boot Mode set to UEFI BIOS, you must perform a fresh installation of Oracle Solaris 11.1.