Hi all, Looking at the 4.1 RFC, there are some additional 'Access_mask' and 'Ace-flag' when compared to 4.0. - Access_mask: ACE4_WRITE_RETENTION ACE4_WRITE_RETENTION_HOLD - Ace-flag : ACE4_INHERITED_ACE But are these supported by 4.1 clients and servers? If you do 'man nfs4_acl' it does not seem to show these additional ones. So how do we set/get them? Also, are there any other differences from an ACL perspective between 4.0 and 4.1? Your insights will be really useful. Thanks and regards, Trishali.