Technical Details
Cluster Shared Volumes operates by orchestrating metadata I/O operations between the nodes in the cluster via the Server Message Block protocol. The node with ownership of the LUN orchestrating metadata updates to the NTFS volume is referred to as the Coordinator Node. Read / Write operations are passed directly to the Serial attached SCSI, iSCSI, Fibre Channel, or Fibre Channel over Ethernet shared storage via block based protocols.
CSV builds a common global namespace across the cluster using NTFS reparse point. Volumes are accessible under the %SystemDrive%\ClusterStorage root directory from any node in the cluster.
The Cluster will automatically prioritize the most favorable network to route I/O operations by selecting the cluster shared network with the lowest cluster network metric value, this can also be manually configured. Public networks (i.e. networks that connect to users) are assigned higher cluster network metric values by default; this favors I/O operations from using the public network which may already be saturated with user requests.
CSV can be enabled in the Failover Cluster Manager MMC snap-in by selecting 'Enable Shared Volumes' from the information pane after creating a cluster. Additionally, CSV can be enabled using PowerShell:
Import-Module FailoverClusters Get-Cluster | %($_.EnableSharedVolumes="Enabled")Read more about this topic: Cluster Shared Volumes
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