How NFSv4 ACLs work
A client using NFSv4 ACLs can set and view ACLs on files and directories on the system. When a new file or subdirectory is created in a directory that has an ACL, the new file or subdirectory inherits all ACL Entries (ACEs) in the ACL that have been tagged with the appropriate inheritance flags.
Enabling or disabling modification of NFSv4 ACLs
When ONTAP receives a chmod command for a file or directory with an ACL, by default the ACL is retained and modified to reflect the mode bit change. You can disable the -v4-acl-preserve parameter to change the behavior if you want the ACL to be dropped instead.
Enabling or disabling NFSv4 ACLs To enable or disable NFSv4 ACLs, you can modify the -v4.0-acl and -v4.1-acl options. These options are disabled by default.