Storing user-specific information in OMVS segments

Information specific to the user is kept in the OMVS segment of the user profile, while information specific to groups is kept in the OMVS segment of the group profile.

The OMVS segment of the user profile contains information such as the user identifier (UID) and the path name of the HOME directory.
For the group profile, the OMVS segment contains the group identifier (GID).

Before users and groups can request access to z/OS® UNIX services, the OMVS segments of the profiles associated with them must be defined.