ReFS:
ReFS (Resilient File System) is the latest development of Microsoft presently available for Windows 8 Servers. File system architecture absolutely differs from other Windows file systems and is mainly organized in a form of B+-tree. ReFS has high tolerance to failures due to new features included into the system. And, namely, Copy-on-Write (CoW): no metadata is modified without being copied; data is written not over the existing data, but into a new disk space. With any file modifications a new copy of metadata is created into free storage space, and then the system creates a link from older metadata to the newer ones. As a result, a system stores significant quantity of older backups in different places providing easy file recovery unless this storage space is overwritten.
For information about
data recovery from these file systems please visit deleted files: chances for recovery page.
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