Microsoft's Hyper-V implements storage with flexible features. Hyper-V supports file storage in the form of a shared virtual hard disk, SMB 3.0. Hyper-V supports block storage with Fibre Channel and iSCSI storage arrays. Disks are presented to virtual machines as either a virtual IDE controller or a virtual SCSI controller.
Cluster Shared Volumes (CSV) is a feature of failover clustering introduced in Windows 2008 R2 for use with Hyper-V. A CSV is a shared disk containing an NTFS or ReFS (Windows Server 2012 R2) volume that is made accessible for read and write operations by all nodes within a Windows server failover cluster. This enables a virtual machine to have complete mobility throughout the cluster, as any node can access the VHD files on the shared volume. CSV simplifies storage by allowing large numbers of VMs to be accessed from a common shared disk and increases the resilience of the cluster by providing I/O fault detection and recovery...