kindly let me know my understanding is right or wrong scenario is I have 100 file servers installed file server and dfs name space and dfs replication file servers conceited storage from SAN and file server are connected into cluster. Now question how-to create cluster between file server? again file server means dfs name space and dfs replication needs to install? third question how users will access file server via DFS namespace or mapping drive (deploy GPO policy)? 

What OS we are talking about here?

windows 2008 R2 OS looking over all concept of file server with dfs and users home folder with folder redirection policy