Use Cluster Shared Volumes in a Failover Cluster

https://technet.microsoft.com/en-us/library/jj612868.aspx

Cluster Shared Volumes (CSV) enable multiple nodes in a failover cluster to simultaneously have read-write access to the same LUN (disk) that is provisioned as an NTFS volume. (In Windows Server 2012 R2, the disk can be provisioned as NTFS or Resilient File System (ReFS).) With CSV, clustered roles can fail over quickly from one node to another node without requiring a change in drive ownership, or dismounting and remounting a volume. CSV also help simplify the management of a potentially large number of LUNs in a failover cluster.

CSV provide a general-purpose, clustered file system, which is layered above NTFS (or ReFS in Windows Server 2012 R2). CSV applications include:

• Clustered virtual hard disk (VHD) files for clustered Hyper-V virtual machines
  
• Scale-out file shares to store application data for the Scale-Out File Server clustered role. Examples of the application data for this role include Hyper-V virtual machine files and Microsoft SQL Server data. (Be aware that ReFS is not supported for a Scale-Out File Server.) For more information about Scale-Out File Server, see Scale-Out File Server for Application Data Overview.