Slightly different question that my previous post, but same subject. Decided to open new question. My customer became very nervous with our myriad of problems with my team’s rehearsing upgrading from Oracle RAC database 18.104.22.168 with Solaris-10. We stumbled significantly with an out of date OS requiring many patches, several needed Grid Infrastructure patches, before getting to the upgrade, and then still not yet successful.
New approach: Customer is now considering upgrading to Solaris-11 first, and then updating RAC database from 11G to 12c. Experts, need your wisdom and experience. For sure a full RMAN backup and then validated back will be my first order of business, after that ….. Appreciate recommendations, suggestions, etc.. Thanks!