This section provides an overview of the installation process, supported OS versions, and installation options.
If the Oracle Solaris OS was preinstalled, it was installed with the server UEFI/BIOS Boot Mode set to Legacy. If you choose to boot the server with the UEFI/BIOS Boot Mode set to UEFI, the preinstalled image will not be accessible. If you want to use the Oracle Solaris OS with the UEFI/BIOS Boot Mode set to UEFI, you must perform a fresh installation.