Need support regarding SMB access issue in TrueNAS SCALE.

TrueNAS General
1

We are facing an issue where users are unable to access SMB shares from Windows systems. The error shown is “Windows cannot access \IP\share – permission denied”.

Environment:

  • TrueNAS SCALE (Community Edition)

  • SMB shares configured on datasets under MainPool

  • Multiple datasets (e.g., MSPOWER, MD, Accounts, etc.)

Issue:

  • While applying ACL permissions (NFSv4), we receive errors like:
    “[EPERM] Filesystem permissions on path /mnt/MainPool prevent access for group ‘root’ or user ‘Admin’”

  • It indicates missing execute (traverse) permission on /mnt/MainPool

  • Unable to modify permissions on MainPool (root dataset restriction)

  • chmod is also not permitted

What we tried:

  • Set ACL using presets (NFS4_OPEN)

  • Enabled recursive and child dataset options

  • Restarted SMB service

  • Cleared Windows credentials

Current blocker:

  • Cannot propagate ACL due to parent dataset restriction

  • Users unable to access shares across systems

Request:

  • What is the recommended approach to handle SMB ACL when root dataset restricts traversal?

  • Should we restructure datasets (create a new parent dataset for SMB)?

  • Best practice to avoid EPERM in this scenario?

Any guidance would be very helpful.

Thanks in advance.

2

Are these Datasets or Folders on the MainPool. The MainPool can not be shared but children datasets can be shared.