About storage plane

The VMware Virtual SAN (vSAN) is used to implement software-defined storage for the Management and Edge Resource clusters.

vSAN is a fully integrated hypervisor-converged storage software. vSAN creates a cluster of server hard disk drives and solid state drives, and presents a flash-optimized, highly resilient, shared storage datastore to hosts and virtual machines. vSAN allows you to control capacity, performance, and availability on a per virtual machine basis through the use of storage policies.