[Sanddancer]

Probably not. The filesystem API Microsoft uses, Installable File System, has been in place and used by a bunch of people since the OS/2 days. Support for filesystems like zfs is lacking more due to apathy than anything else.

[andreiw]

The IFS kit was a separate purchase from the DDK, even. There's a pieced-together header floating around on the web (as well as some OSS drivers for things like ext2)...