Home > Storage > Data Storage Essentials > AppSync > Integrating Dell PowerStore with AppSync > Write order consistency with PowerStore
The volume group (VG) feature of PowerStore is similar to the consistency group feature in other storage systems. Volume groups are implemented in a unique fashion; they can be created without write order consistency (WOC). This feature can be used to manage and monitor a set of resources that are under a container or folder.
End users should design their storage layout to achieve and maintain consistency across multiple volumes that are contained in an application. If WOC is not enabled on a VG, the crash consistency feature that is provided by the PowerStore appliance cannot be used. AppSync provides a warning if a service plan or repurposing workflow is used with a VG that is configured without WOC.