root@freenas:~ # testparm -s /usr/local/etc/smb4.conf
Load smb config files from /usr/local/etc/smb4.conf
Loaded services file OK.
Weak crypto is allowed

WARNING: some services use vfs_fruit, others don't. Mounting them in conjunction on OS X clients results in undefined behaviour.

Server role: ROLE_STANDALONE

# Global parameters
[global]
        aio max threads = 2
        bind interfaces only = Yes
        disable spoolss = Yes
        dns proxy = No
        kernel change notify = No
        load printers = No
        logging = file
        max log size = 5120
        nsupdate command = /usr/local/bin/samba-nsupdate -g
        registry shares = Yes
        restrict anonymous = 2
        server role = standalone server
        server string = FreeNAS Server
        unix extensions = No
        idmap config *: range = 90000001-100000000
        idmap config * : backend = tdb
        directory name cache size = 0
        dos filemode = Yes


[public]
        ea support = No
        guest ok = Yes
        path = /mnt/WD3TB-BACKUP/
        posix locking = No
        printable = Yes
        read only = No
        vfs objects = zfs_space zfsacl streams_xattr
        nfs4:chown = true


[cifs]
        comment = CIFS
        ea support = No
        guest ok = Yes
        hide dot files = No
        level2 oplocks = No
        mangled names = no
        map archive = No
        oplocks = No
        path = /mnt/WD3TB-BACKUP/%U
        read only = No
        smbd max xattr size = 2097152
        store dos attributes = No
        strict locking = Yes
        vfs objects = zfs_space fruit streams_xattr zfsacl
        fruit:encoding = native
        zfs_core:zfs_auto_create = true
        fruit:resource = stream
        fruit:metadata = stream
        nfs4:chown = true