In previous Windows 10 releases ReFS version was 1.2.
Windows 10 Creators Update features an updated version of ReFS. In Windows 10, it is in fact locked for server OS only. The integrity scanner periodically scans the volume, identifying latent corruptions and proactively triggering a repair of that corrupt data. The integrity capabilities of ReFS are leveraged by a data integrity scanner, which is also known as a scrubber.
This format also supports 2^64-1 byte file sizes, 2^64 files in a directory, and the same number of directories in a volume. ReFS is not only designed to support volume sizes of 2^64 bytes (allowed by Windows stack addresses), but ReFS is also designed to support even larger volume sizes of up to 2^78 bytes using 16 KB cluster sizes. As the amount and size of data that is stored on computers continues to rapidly increase, ReFS is designed to work well with extremely large data sets-petabytes and larger-without performance impact. Because ReFS performs all repair operations online, it does not have an offline chkdsk command. Although rare, if a volume does become corrupted or you choose not to use it with a mirror space or a parity space, ReFS implements salvage, a feature that removes the corrupt data from the namespace on a live volume and ensures that good data is not adversely affected by nonrepairable corrupt data. With ReFS, if corruption occurs, the repair process is both localized to the area of corruption and performed online, requiring no volume downtime. Historically, file systems were often susceptible to data corruption that would require the system to be taken offline for repair. ReFS prioritizes the availability of data. In addition, there are Windows PowerShell cmdlets ( Get-FileIntegrity and Set-FileIntegrity) that you can use to manage the integrity and disk scrubbing policies. When ReFS is used in conjunction with a mirror space or a parity space, detected corruption-both metadata and user data, when integrity streams are enabled-can be automatically repaired using the alternate copy provided by Storage Spaces. ReFS stores data in a way that protects it from many of the common errors that can normally cause data loss. The significant functionality included with ReFS is described as follows: Codenamed "Protogon", it improves on NTFS in some respects, while also removing a number of features.