PerfectDisk 13 Service Pack 2 (Build 821) includes feature enhancements, including ReFS and Cluster Shared Volume (CSVFS) support, as well as bug fixes. All changes have been listed below.
ReFS Defrag and Fragmentation Prevention
New to PerfectDisk 13 SP2 is support for ReFS. ReFS is found in Windows 8.1 and Windows Server 2012/2012 R2. ReFS is NOT found in earlier versions of Windows.