This wizard adds one or more nodes (servers) to an existing cluster. All nodes in a cluster should use the same hardware, ...

This wizard adds one or more nodes (servers) to an existing cluster.  All nodes in a cluster should use the same hardware, firmware, and software (including drivers and operating system updates) as other nodes in the cluster.  Before you run this wizard, we strongly recommend that you run the Validate a Configuration wizard for both the existing cluster nodes and the new node or nodes. The Validate a Configuration wizard helps ensure that your hardware and hardware settings are compatible with failover clustering.  Microsoft supports a cluster solution only if the complete configuration (servers, network, and storage) can pass all tests in the Validate a Configuration wizard.  To continue, click Next.