A distributed virtual SAN infrastructure provides a scalable dynamically expandable virtual storage service pool to a plurality of host systems. The storage service pool is created via execution of a virtual storage automatic construct protocol and provides storage volume (space) to each of the host systems in on-demand base. The distributed virtual SAN infrastructure includes one or more SAN units including IP SAN unit and Fiber Channel SAN unit, at least one management console, one distributing control system across a network infrastructure, where the network infrastructure provides the communication links between all systems in the distributed virtual SAN infrastructure.