Home > Storage > PowerStore > Data Protection > Dell PowerStore: Metro Volume > Introduction
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 new and existing Metro Volume deployments and further mitigates the risk of split-brain situations. This is accomplished by more intelligent decision making across a wider variety of infrastructure outage scenarios, including unplanned outages. In addition, the witness component satisfies the requirements and recommendations found in vSphere Metro Storage Cluster (vMSC) designs.