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In PowerStoreOS 3.0 and higher, PowerStore appliances support native metro volume replication. This provides synchronous replication of spanned block storage volumes exclusively for VMware VMFS Datastores in an active/active configuration across two PowerStore clusters in metro distance. In PowerStoreOS 4.0, volume group support has been added, along with Windows and Linux support. For more information about Metro Volume support, see the white paper Dell PowerStore: Replication Technologies. For best practices for Metro Volume (latency, distance, uniform/non-uniform configurations, and so on), see the white paper Dell PowerStore: Metro Volume. Both are available on the PowerStore Info Hub.