Globally unique resources that provide access to data management services and serve as the parent namespace for the services.
Hey,
Since S2D is not available on Windows Server 2012R2, you can use alterative shared storage solutions. StarWind VSAN can help you achieving this. It will create shared storage pool for the cluster, which SQL FCI requires. The following guide will walk you through the configuration: https://www.starwindsoftware.com/resource-library/starwind-virtual-san-installing-and-configuring-sql-server-2014-failover-cluster-instance-on-windows-server-2012-r2/