Home > Storage > PowerScale (Isilon) > Product Documentation > Management and Migration > PowerScale OneFS Authentication, Identity Management, and Authorization > ACL file state
The ACL file state offers granular access through extensive DACLs. The granular access might be required for heavy read and write activity from NFS, HDFS, and SMB clients. The token of all clients is compared to the ACL, while considering the many DACLs in the file permission. An approximated POSIX permission is created based on the ACL only for display purposes when an NFS or HDFS client issues an ls over an NFS export. The approximated POSIX is representation only and might look more permissive than the ACL actually is.