The NetWare access mode provides users and applications with a more complete translation of NetWare effective rights into UnixWare permissions, while still allowing the NetWare administrator to retain complete control over the volume, with no access control changes allowed from UnixWare.
In contrast to DOS Mode, which uses only the DOS name space and NUCFS to provide NetWare connectivity, NetWare mode volumes require the NFS name space on the volume and the NUC NLM loaded on the server.
NetWare mode allows UnixWare-style access to files in that permissions and ownership are presented for the user, group, and other permissions (in contrast to the user-permission-only presentation on DOS mode volumes).
The NUC allows you to use UnixWare file manipulation commands on a NetWare mode volume. No access control modifications, however, are allowed from the UnixWare side (with one exception: making a file executable).
The NetWare access mode requires much more administration on the NetWare server than the DOS mode, but still has minimal performance impact on the NetWare server and on UnixWare.