Review the contents in this section to validate that your Oracle RAC cluster is ready for upgrades.

• cluvfy Command Options for Database Upgrade Validation
  Use the Cluster Verification Utility (CVU) command cluvfy stage -pre dbinst -upgrade to check the readiness of your Oracle RAC installation for upgrades.
• Verifying System Readiness for Oracle Database Upgrades
  Use Cluster Verification Utility (CVU) to assist you with system checks in preparation for starting a database upgrade.