Fsmemfs is a simple memory file system based on WinFsp (WinFsp - Windows File System Proxy, Copyright (C) Bill Zissimopoulos). I wrote it to test various options of the WinFsp and also to learn F#. It works but it's not fully tested so please be warned.
The available options are:
Usage: fsmemfs OPTIONS
Options:
-m VALUE [required] mount point, could be a drive (G:) or a folder (C:\memfs)
-v [optional] enable verbose log
-l VALUE [optional] a path to a file where fsmemfs should write logs
-D VALUE [optional] a path to a file where WinFsp should write debug logs
-F VALUE [optional] a filesystem name, if not set it will be 'fsmemfs'
To create a new G: volume, simply run: fsmemfs -m G:.
Additionally, to see some logs from the kernel driver (-D) and user-mode driver (-l), run: fsmemfs -v -l d:\temp\fsmemfs.log -D d:\temp\fsmemfs-driver.log -m G:.