Once the mount command is issued successfully and a mount point is established between a local directory and the MVS or z/OS UNIX file system, the mount point information is saved in the mount handle data set by the z/OS NFS server. This information is used to automatically reestablish active mount points when the server is started. When accessing z/OS conventional MVS data sets, a mount point is active if the last activity against this mount point is less than the restimeout attribute value set by the system administrator.

The mount command does not need to be reissued for the same mount point in further sessions unless the umount command has been used to disconnect the mount point or the mount point has been disconnected by the cleanup activity of the restimeout site attribute. For more information about the restimeout site attribute see Initialization attributes for the z/OS NFS server.