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Continue to ChatUpgrading Oracle Grid Infrastructure 11gR2 to 12cR2 http://oracle-help.com/oracle-rac/upgrading-oracle-grid-infrastructure-11gr2-12cr2/
Upgrading Oracle Grid Infrastructure 11gR2 to 12cR2 http://oracle-help.com/oracle-rac/upgrading-oracle-grid-infrastructure-11gr2-12cr2/