During z/OS UNIX file system initialization, the z/OS NFS client is started and run in the logical file system (LFS) colony address space. The filesystype parmlib statement for the z/OS NFS client must be present in the SYS1.PARMLIB(BPXPRMxx) parmlib member in order to start the z/OS NFS client. For more information about z/OS UNIX file system reference see z/OS UNIX System Services File System Interface Reference.