File system authorization

The type of authorization for the file system is specified on the -k option on the mmcrfs command or changed at a later time by using the -k option on the mmchfs command.

posix: Traditional GPFS access control lists (ACLs) only (NFS V4 and Windows ACLs are not allowed).
nfs4: Support for NFS V4 and Windows ACLs only. Users are not allowed to assign traditional ACLs to any file system objects.
all: Allows for the coexistence of POSIX, NFS V4, and Windows ACLs within a file system. This is the default.

If the file system will be used for the CES stack, nfs4 is required.