Storage Spaces on Windows Server 2012 R2 supports creating a clustered storage pool when using mirror spaces, parity spaces, and simple spaces. Windows Server 2012 doesn't support parity spaces on clustered storage pools. 

To cluster Storage Spaces, your environment must meet the following requirements:

  • All storage spaces in the storage pool must use fixed provisioning.
  • Two-way mirror spaces must use three or more physical disks.
  • Three-way mirror spaces must use five or more physical disks.
  • Parity spaces are supported on Windows Server 2012 R2, but not Windows Server 2012.
  • All physical disks in a clustered pool must be connected via SAS.
  • All physical disks must support persistent reservations and pass the failover cluster validation tests.

Note: The SAS JBOD must be physically connected to all cluster nodes which will use the storage pool.  Direct attached storage that is not connected to all cluster nodes is not usable for clustered pools with Storage Spaces.