#Rechte der Dirs auf dem OMV-Server:

root@omv-vbox:/srv/dev-disk-by-id-ata-VBOX_HARDDISK_VBdab1437a-5427cf14-part1# ls -l
drwxrwsr-x  2 root users  4096 Mai 17 12:07 nfs-Daten
drwxrwsrwx+ 7 root users  4096 Mai 17 13:25 plex

#Die exports hat omv angelegt:

cat /etc/exports
# This file is auto-generated by openmediavault (https://www.openmediavault.org)
# WARNING: Do not edit this file, your changes will get lost.

# /etc/exports: the access control list for filesystems which may be exported
#               to NFS clients.  See exports(5).
/export/NFS-Daten 192.168.178.0/24(fsid=1,rw,subtree_check,insecure)
/export/plex-Data 192.168.178.0/24(fsid=2,rw,subtree_check,insecure)

# NFSv4 - pseudo filesystem root
/export 192.168.178.0/24(ro,fsid=0,root_squash,no_subtree_check,hide)


#Rechte der Dirs auf dem Client (Manjaro):

[peter@Peter-Medion-Buero Mount]$ ls -l
drwxrwsrwx 7 root    100 4096 17. Mai 13:25 plex-data
drwxrwsr-x 2 root    100 4096 17. Mai 12:07 test
[peter@Peter-Medion-Buero Mount]$ sudo mount -t nfs 192.168.178.90:/NFS-Daten test
[peter@Peter-Medion-Buero Mount]$ ls test
test.txt
[peter@Peter-Medion-Buero Mount]$ sudo mount -t nfs 192.168.178.90:/plex-Data plex-data
[peter@Peter-Medion-Buero Mount]$ ls plex-data
ls: Öffnen von Verzeichnis 'plex-data' nicht möglich: Keine Berechtigung
[peter@Peter-Medion-Buero Mount]$ sudo ls plex-data
[sudo] Passwort für peter:
Config  Movies  Music  Transcode  TV