Verify that a host cluster meets the requirements for enabling Virtual SAN.
All capacity devices, drivers, and firmware versions in your Virtual SAN configuration must be certified and listed in the Virtual SAN section of the VMware Compatibility Guide.
A Virtual SAN cluster must contain a minimum of three hosts that contribute capacity to the cluster. For information about the considerations for a three-host cluster, see Design Considerations for a Virtual SAN Cluster.
A host that resides in a Virtual SAN cluster must not participate in other clusters.