step process of installing / creating 2-node Oracle 11g Real Application Cluster (RAC) on

http://www.oracledba.org/11g/rac/Pre_Installation_11g_rac.html

http://www.oracledba.org/11g/rac/11g_rac.html

Whitepapers:  

http://www.oracledba.org/index.html