Home > Storage > PowerStore > Virtualization and Cloud > Dell PowerStore: VMware vSphere with Tanzu and TKG Clusters > Introduction
Dell PowerStore Metro Volume provides synchronous replication of spanned block storage volumes across two PowerStore clusters in metro distance for VMFS datastores. The Metro Volume feature provides a path for VMware vSphere Metro Storage Cluster (vMSC) architectures.
The release of PowerStoreOS 3.6 introduces a witness component to the Metro Volume architecture. The functional design of the witness adds more resiliency to Metro Volume deployments and further mitigates risk of split-brain situations. This is accomplished by more intelligent decision making across a wider variety of infrastructure outage scenarios, including unplanned outages.