Clustered shared volumes are shared disks in a Windows failover cluster which can be accessed concurrently for read and write operations by all cluster nodes. The shared disks can be provisioned as NTFS or ReFS (Resilient File System).
Clustered Shared Volume Requirements
Review some of the following important requirements when you are considering using CSV in a failover cluster.
- A disk or storage space for CSV must be basic disk that is partitioned with NTFS or ReFS (Assuming Server 2012 R2). You cannot use a disk partitioned with FAT or FAT32.
- You must use the physical disk resource type.
- You must use multiple network adapters for fault tolerance.
Clustered Shared Volume Benefits
- With CSV, fewer disks are needed because multiple nodes in a cluster share the same disks for reading and writing data.
- CSV offers fault tolerance because multiple connections are created between shared disks and nodes, so if one of the communication links goes down, further communication is accomplished through the other links.
- In case of node failure, you are not required to change drive ownership, dismount or remount a volume.