NFS mount on new openHABian RPi 3

Hi community,

I am switching from OH3 to OH4. I could not update my old system, thus I created a fresh image using openHABian. OH4 is up and running on it, and now I want to restore my OH3 configuration within OH4. My backup files are contained on Synology NAS. With my “old” system, mounting a share with nfs is working. (I assume, that the nfs server side configuration (ths nas) may not be changed.)

On my “new” system, mounting is possible, but I don’t have the access rights for the files on my share. If I want to list the files, I get an error:

ls: cannot open directory ‘.’: Permission denied

I’m doing hard finding the differences between the relevant configurations on my old and my new system. Does anybody have a hint?

I checked (on old and new system):

  • user and password → identical
  • fstab configuration for nas → identical
  • uid and gid → identical

I’ve used these online resources for troubleshooting:

Thanks in advance.

I’ll post some more diffs from my old to my new system by time.


  • Platform information “new”:

    • Hardware: BCM43455 37.4MHz Raspberry Pi 3±0190
    • OS: Raspbian GNU/Linux 12 (bookworm)
    • Java Runtime Environment: openjdk version “17.0.12” 2024-07-16
    • openHAB version: 4.2.2 (Build)
  • Platform information “old”:

    • Hardware: BCM43455 37.4MHz Raspberry Pi 3±0190
    • OS: Linux openHABianPi 6.6.58-v7+ #1809 SMP Wed Oct 23 11:51:11 BST 2024 armv7l
    • Java Runtime Environment: openjdk version “11.0.10” 2021-01-19 LTS
    • openHAB version: 4.2.2 (Build)

Read the Amanda docs the part on root_squash

I’ve changed the root_squash on server side, every user has admin rights now.
I read the Synology docs: Wie kann ich über NFS auf bereitgestellte freigegebene Ordner zugreifen und Berechtigungen einrichten? - Synology Knowledge Center