If the server supports Oracle System Assistant, then it might be already installed.
If it is already installed, and you want the latest version, then update Oracle System Assistant by using the Get Updates task.
If Oracle System Assistant is installed in the server, but it has been corrupted or overwritten, download the recovery ISO image from http://support.oracle.com.
If the server supports Oracle System Assistant, but it is not installed, contact your Oracle representative.
See Also
Oracle X4 Series Servers Administration Guide (http://www.oracle.com/goto/x86AdminDiag/docs)