Both the client and server operate as described in NFS client translation support and NFS servers with non-z/OS based NFS clients.

In order to avoid double translation, the mount to the server must specify the correct cln_ccsid (server option) and the client TSO MOUNT command should not have the tag option. The client mount option xlat(N) should be specified so that only the server will do translation (if needed) and return the data in the correct CCSID.

mount filesystem(NFS001) type(nfs) mountpoint('/u/nfsdir')
           parm('mvsnfs:"/hfs/u/user,text,cln_ccsid(2000)",xlat(N)')
           vi /u/nfsdir/file1

**  Translation will be done by the server only based on file1's file tag and
    cln_ccsid of 2000.

In all other cases, double translation may occur as the server will do translation based on its file tag and cln_ccsid settings and the logical file system will do translation based on the process tag and the CCSID in the mount tag option. Caution must be used as double translation may result in the data becoming garbage.