Hypercheck: Pre-Upgrade Check Tool
Cisco recommends running Hypercheck health check tool before the upgrade to validate all upgrade requirements are met. The Hypercheck: HyperFlex and Pre-Upgrade Check Tool are automated health and pre-upgrade checks that are designed to ensure your clusters are healthy before you upgrade. It is imperative that this health check is not just performed, but that you take corrective action on any cluster that is found to be unhealthy. Correct all issues reported by the Hypercheck health check before continuing with the upgrade.
If you prefer not to run the Hypercheck tool, please refer to manual checklist in chapter 14. These checks are not as comprehensive as Hypercheck so manual validation is not recommended.