The ability to create ReFS volumes was removed in Windows 10's 2017 Fall Creators Update for all editions except Enterprise and Pro for Workstations
ReFS
en.wikipedia.org
Removed features
Some NTFS features are not implemented in ReFS. These include
object IDs,
8.3 filename,
NTFS compression,
Encrypting File System (EFS),
transactional NTFS,
extended attributes, and
disk quotas.
[6][2][16] In addition,
Windows cannot be booted from a ReFS volume.
[2] Dynamic disks with mirrored or striped volumes are replaced with mirrored or striped storage pools provided by Storage Spaces; however, automated error-correction is only supported on mirrored spaces.
Data deduplication was missing in early versions of ReFS.
[2] It was implemented in v3.2, debuting in Windows Server v1709.
[3]
Support for
alternate data streams and
hard links was initially not implemented in ReFS. In Windows 8.1 64-bit and Server 2012 R2 the file system reacquired support for alternate data streams only, with lengths of up to 128K, and automatic correction of corruption when integrity streams are used on parity spaces.
[17] ReFS had initially been unsuitable for
Microsoft SQL Server instance allocation due to the absence of alternate data streams.
[18]
File system
en.wikipedia.org
Windows makes use of the FAT, NTFS, exFAT, Live File System and ReFS file systems (the last of these is only supported and usable in Windows Server 2012, Windows Server 2016, Windows 8, Windows 8.1, and Windows 10; Windows cannot boot from it).
Windows uses a drive letter abstraction at the user level to distinguish one disk or partition from another. For example, the path C:\WINDOWS represents a directory WINDOWS on the partition represented by the letter C.
Drive C: is most commonly used for the primary hard disk drive partition, on which Windows is usually installed and from which it boots. This "tradition" has become so firmly ingrained that bugs exist in many applications which make assumptions that the drive that the operating system is installed on is C.
The use of drive letters, and the tradition of using "C" as the drive letter for the primary hard disk drive partition, can be traced to MS-DOS, where the letters A and B were reserved for up to two floppy disk drives. This in turn derived from CP/M in the 1970s, and ultimately from IBM's CP/CMS of 1967.
