ScsDriver vs Air Live Mount — Real Disk vs Network Drive on Windows

Air Live Mount is the closest conceptual competitor to ScsDriver: both expose a remote store as a drive letter on Windows, both claim to bypass the UNC restrictions, and both advertise compatibility with media servers and legacy apps. We ran both side-by-side on the same machine against the same Synology WebDAV endpoint for three weeks. The differences turned out to be deeper than the marketing suggests.

The fundamental split

• Air Live Mount uses the WebDAV Mini-Redirector driver (the same one Windows uses internally for WebClient). It is still a network redirector underneath; the OS sees the mount as a network drive even though it appears as a local letter.
• ScsDriver uses DocFlt / cbfs to install a real local file system filter. The OS sees the mount as a local NTFS volume.

That difference matters because the Mini-Redirector has hard limits baked into Windows: maximum 16 concurrent connections per server, default 8 KB transfer buffer, and a built-in limit of about 50 open files before throttling kicks in. ScsDriver has none of those limits because it is not using the Mini-Redirector at all.

Where they look identical

If you mount a small share, open a few files, and never stress-test it, both tools appear to work the same way.

Where Air Live Mount breaks

• Media library scanning (Plex, Jellyfin, Kodi) on a large library with thousands of files: Air Live Mount's Mini-Redirector throttles and the scan stalls. ScsDriver scans without throttling.
• Open more than 50 files concurrently (a build pipeline, a photo catalog import): Air Live Mount starts hitting the open-files cap. ScsDriver does not.
• Transfer a file larger than ~2 GB: Air Live Mount uses the default 8 KB buffer, which makes large transfers very slow. ScsDriver uses configurable multi-MB buffers.

Where ScsDriver is the wrong choice

If you only need to mount a single share for occasional file access, Air Live Mount is simpler to set up and works fine. ScsDriver's extra configuration knobs are wasted if you do not need them.

Verdict

If you are running a real workload on the mount (Plex library, video pipeline, build server, photo catalog), ScsDriver's local-disk implementation matters. If you only need casual file access, Air Live Mount is fine and cheaper.

Want the full Mini-Redirector limit breakdown? See Windows Mini-Redirector limits explained.