I am sure I know the answer and I cannot find anything to disprove the point but final clarification required please. There is no separate 10G release on any Unix platform that requires different Oracle software for the install is there? All 10G installs check to see if a cluster is in place and then provide the option for installing RAC automatically from the existing s/w TIA John John Hallas Oracle DBA - Projects Team Infrastructure & Application Services, Technology Tel: +44 (0) 16356 77721 or 07798 950236 E-mail : john.hallas@xxxxxxxxxxxxxx Vodafone Limited Registered Office : Vodafone House, The Connection, Newbury, Berkshire RG14 2FN Registered in England No 1471587