[1] RFS relied on the STREAMS Transport Provider Interface feature of this operating system.
Some licensees of AT&T UNIX System V Release 4 did not include RFS support in SVR4 distributions, and Sun Microsystems removed it from Solaris 2.4.
The basic application architecture of RFS is the client–server model, in which a participating host may be a server as well as a client, simultaneously.
It was based on different design decisions, in comparison to the Network File System (NFS).
This enabled the system to provide remote access to hardware resources located on an RFS server.