Unless I'm really mistaken, NTFS, as a file system, can delete an open file; Windows' Win32 subsystem simply forbids it. You should get the same behavior when

Unless I'm really mistaken, NTFS, as a file system, can delete an open file; Windows' Win32 subsystem simply forbids it. You should get the same behavior when mounting ext2 from Windows, and you should be able to delete open files when mounting NTFS from Linux. It was a design choice that I personally think is idiotic, but it's at the Windows subsystem later, not the file system. For that reason, no, I assume ReFS does not let you delete an open file. In terms of functionality: ReFS is a subset of ZFS-like system. That's not been available on Unix for decades, and since ZFS is patented and both that and Btrfs are controlled by a competitor, I don't fault them for making their own format. What I am nonplussed on is why ReFS is missing old Windows features like links, which (despite another poster's claim) are used rather heavily, by the default Windows install, no less.