ReFS, as a next generation file system built on the foundations of the NTFS

ReFS File System for Windows Server 8

In his latest Building Windows 8 post, Steven Sinofsky introduces the Resilient File System, or ReFS, as a next generation file system built on the foundations of the NTFS. By reusing NTFS’ API / semantics engine, ReFS hopes to retain a high level of compatibility with NTFS features. ReFS will only be available inside Windows Server 8. Microsoft has plans to test it fully before making it available to Windows 8 client users. ReFS simply plugs into the storage stack like any existing file systems, and is built on the foundations of NTFS to maintain elements of compatibility. ReFS and Storage Spaces, a feature Microsoft detailed recently, were forged to complement each other for a complete storage system overhaul in Windows 8. The main advantages of the new file system include the ability for Windows 8 to detect all forms of disk corruption, data striping support for performance, and an allocate on write model known as copy on write. Microsoft has used copy on write (COW) concepts in its SQL Server products and Volume Shadow Copy Service previously, enabling quick snapshots of large data sets. ReFS cannot be used on removable media, nor can it be used to boot an operating system it’s simply for storage right now.
source:www.engadget.com