Home > Storage > PowerStore > Virtualization and Cloud > Dell PowerStore: Microsoft Hyper-V Best Practices > PowerStore volume groups
In a clustered environment, including Hyper-V, where a workload might span multiple CSVs, time consistency of snapshots and replication becomes vital in recovery scenarios. Use volume groups in PowerStore to ensure time consistency.
Run the Create Volume Group wizard in PowerStore to create a volume group. By default, the Apply write-order consistency to protect all volume group members is selected. Keep this default to ensure that PowerStore protection policies (snapshot rules and replication rules) apply to all volumes in the group simultaneously.
You can add new or existing volumes to a volume group. For a multiappliance PowerStore cluster, volumes added to a volume group must all reside on a common appliance.
If a volume is not on a common appliance, migrate the volume to the same appliance as the other volumes in the cluster.
Once the migration is complete, you can group the volume with the other volumes, and the wizard will finish without errors. Any protection policies (snapshot rules and replication rules) assigned at the volume-group level are applied automatically to all new and existing volumes in the group. If a volume-group protection policy includes a replication rule, it might take time for initial replication to complete if volumes contain significant data.