Skip to content

reflink for Windows

License

Notifications You must be signed in to change notification settings

0xbadfca11/reflink

Folders and files

NameName
Last commit message
Last commit date

Latest commit

314e262 · May 22, 2024

History

89 Commits
Jul 3, 2020
Nov 18, 2019
Mar 28, 2015
May 22, 2024
Nov 18, 2019
Jan 19, 2020
Jun 12, 2020
Nov 19, 2018
Nov 18, 2019
No commit message
Oct 7, 2021
Nov 18, 2019
Nov 18, 2019

Repository files navigation

Inform you that no longer need

Since Windows 11 24H2, Windows copy engine uses block cloning by default.

reflink for Windows

Copy file without actual data write.

reflink source destination

source       Specifies a file to copy.
             source must have placed on the ReFS volume.
destination  Specifies new file name.
             destination must have placed on the same volume as source.

Windows Server 2016 introduce Block Cloning feature.
I wanted cp --reflink. But, only exposed to API.

Important note

  • Block Cloning requires ReFS v2.
    ReFS v2 is only available in Windows Server 2016 and Windows 10 version 1703 (build 15063) or later.
    Windows 10 version 1607 (build 14393) and earlier Windows only can use ReFS v1.
    Even moving ReFS v1 volume from earlier Windows to WS2016 or W10 v1703 cannot use Block Cloning. Require format to ReFS v2 in WS2016 or W10 v1703.
    You may check by fsutil fsinfo volumeinfo or fsutil fsinfo refsinfo.
    • by volumeinfo
      When Supports Block Cloning is included in fsutil output, can use Block Cloning.
    • by refsinfo
      Version 1.2 or 1.1 is ReFS v1.
      Version 3.1 or upper is ReFS v2.
LICENSE

MIT License