Missing NTFS/ReFS sparse support

[da2x]

NTFS requires files to be created with the FILE_ATTRIBUTE_SPARSE_FILE attribute to treat them as sparse. This is different from other modern OSes where you don’t need to do anything special.

I tested with fsutil.exe sparse queryflag supposedly_sparse.file and various calls to check file sizes, and found that the files aren’t marked as sparse files on NTFS.

[RangerMauve]

Is there a way to set this flag in the node.js FS module? I can't find any docs for it.

[da2x]

Maybe https://github.com/markablov/win_ioctl ?

[mafintosh]

In latest (sparse: true)