Distributed File System for Microsoft Windows NT Server (DFS) allows distributed file systems capabilities on Windows NT Server. A distributed file system provides a single tree structure for multiple shared volumes located on different servers. A user accessing a share using DFS doesn't need to know the name of the server where the share resides.
If a file server goes down, or if you need to move a volume from one server to another, you can do so without informing users of the change. You can increase data availability and transparently distribute load across multiple servers by using duplicate storage points for a single volume.