Enable or disable Xsan access control lists in macOS Server
You can use Server to specify whether the Xsan file system uses access control lists (ACLs) on a volume.
Xsan clients and later and Windows StorNext clients recognize ACLs. UNIX clients ignore ACLs on Xsan volumes. If you have a mix of Windows clients and Xsan clients, they must all be bound to the same directory domain, whether provided by Open Directory configured as a primary domain controller (PDC) or by Windows Active Directory.
Note: If you enable ACLs but your SAN includes clients that don’t support them, don’t use those clients to change file or folder ownership information, or inconsistencies might result.
In the Server app sidebar, select Xsan from the list of advanced services.
Select the volume you want to edit.
Click and choose Edit Volume.
Select “Use access control lists,” then click OK.
After you click OK, the volume is unmounted from all SAN computers, then remounted.