The ls command in OneFS has been modified to have an extra flag (-e) that will show you the specifics of not only which files have an ACL but also which ACEs are listed in the ACL from the OneFS command line.    When you execute the ls command from the cluster (the UNIX equivalent of typing dir from a windows command prompt) , you may see a "+" next to the permissions.    That "+" means that that file or folder has an ACL and that the POSIX mode bits that are being presented to any UNIX / NFS client are derived from the entries in the list.    If you add the -e flag to your ls command (ls -le) then the Isilon OneFS will return not only the basic file info but will also show you exactly what Entries are contained in the List. 
How can I tell if my folder or directory on a OneFS file system is using POSIX mode bits or an ACL?
POSIX or ACL?