Virtual SAN is a distributed layer of software that runs natively as a part of the ESXi hypervisor. Virtual SAN aggregates local or direct-attached storage disks of a host cluster and creates a single storage pool shared across all hosts of the cluster.

While supporting VMware features that require shared storage, such as HA, vMotion, and DRS, Virtual SAN eliminates the need for an external shared storage and simplifies storage configuration and virtual machine provisioning activities.

For information about troubleshooting Virtual SAN, see the vSphere Troubleshooting documentation.