I assume you have MOS access? These documents may help: Oracle Clusterware (CRS or GI) Rolling Upgrades (Doc ID 338706.1) RACcheck Upgrade Readiness Assessment (Doc ID 1457357.1) Complete Checklist for Manual Upgrades to 11gR2 (Doc ID 837570.1) -Mark -- Mark J. Bobak, Lead Oracle DBA ProQuest | 789 E. Eisenhower Pkwy | Ann Arbor, MI 48108-3218 USA | +1 734 997 4059 www.proquest.com<http://www.proquest.com/> ProQuest... Start here. 2013 InformationWeek 500 Top Innovator From: Saad Khan <saad4u@xxxxxxxxx<mailto:saad4u@xxxxxxxxx>> Reply-To: "saad4u@xxxxxxxxx<mailto:saad4u@xxxxxxxxx>" <saad4u@xxxxxxxxx<mailto:saad4u@xxxxxxxxx>> Date: Wednesday, February 26, 2014 at 3:16 PM To: "oracle-l@xxxxxxxxxxxxx<mailto:oracle-l@xxxxxxxxxxxxx>" <oracle-l@xxxxxxxxxxxxx<mailto:oracle-l@xxxxxxxxxxxxx>> Subject: upgrade RAC from 11.1.0.7 to 11.2 Hi, I'm working on oracle clusterware and database upgrade from 11.1.0.7 to 11.2.0.3 (on aix) Does anyone have a document that I can follow? Thanks. Appreciated