When SQL Server is installed as a Failover Cluster Instance, it is leveraging the WSFC feature for high availability and disaster recovery. The Failover Cluster Instance is made up of a set of physical servers which have a similar hardware configuration, operating system, patch level, SQL Server version, and components. They also share the instance name.
Once you have planned your Windows Server configuration, you can start the SQL Server installation process. In Failover Cluster Instance installation, you have several choices, including installation via the setup GUI wizard, available in the installation media, installing with advanced options, or installing as an unattended setup via the command line. To start the Failover Cluster Instance installation, simply click on New SQL Server failover cluster installation, which will bring up the...