If you plan to use DFSMShsm to backup HFS or zFS data sets mounted by z/OS® UNIX System Services, DFSMShsm must have a RACF® userid associated with it, with one of the following levels of authorization:

• The RACF userid associated with DFSMShsm must have UPDATE authority to the UNIXPRIV SUPERUSER.FILESYS.QUIESCE profile, or
• DFSMShsm must be defined to z/OS UNIX System Services as a superuser, and the RACF userid must have a default RACF group which has an OMVS segment with a group id (GID). The userid must also have an OMVS segment with the following parameters: UID(0) HOME('/').

Either of these methods provide the required authorization to quiesce or unquiesce a file system. For additional information, refer to z/OS UNIX System Services Planning.