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Dell Storage Manager 2020 R1 Administrator's Guide

Automatic ACL to UNIX Word 777 Mapping

When files with Windows ACLs are displayed from NFS clients, the FluidFS mapping algorithm shows a translated UNIX access mode. Perfect translation is not possible, so a heuristic is used to translate from the rich Windows ACL to the 9 bits of the UNIX word. However, when some special SIDs are used inside ACL (for example, creator-owner ACE), the mapping can be inaccurate. For some applications, NFS clients must see the exact mapping or a mapping for more permissive access. Otherwise, the NFS applications might not perform denied operations.

FluidFS versions 5 or later provide an option that causes all objects with SMB ACLs to be presented with UNIX Word 777 from NFS clients (for display only). This option, which is disabled by default, can be configured under NAS Volume settings.
  1. In the Storage view, select a FluidFS cluster.
  2. Click the File System tab.
  3. In the File System view, select a NAS volume.
  4. Click Edit Settings.
  5. In the Edit NAS Volume Settings panel, click Interoperability.
  6. Select the Display ACL to UNIX 777 to NFS Clients Enabled checkbox.
NOTE:Actual data-access checks in FluidFS are still made against the original security ACLs.

This feature applies only to NAS volumes with Windows or mixed security style (for files with Windows ACLs).


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