You talk about windows cluster, is this the correct structure that you want.
If you are looking to a Oracle Database active - passive structure. Lets say Oracle Dataguard than the primary database is operational on server 1 and de standby is in recover mode (passive) on server 2. For more info on Dataguard "http://docs.oracle.com/cd/E11882_01/server.112/e25608/toc.htm"
Jos van den Oord
Blog : http://joordsblog.vandenoord.eu/
Company : http://www.transfer-solutions.com/