I have setup OMV to expose NFS mounts for an OSMC player. Issue I'm having is whenever I reboot OMV, I lose those mounts, if I try to browse a mount manually through terminal I get 'permission denied'. Have tried umount -f /mnt/SHARE and then mount -a, no luck.
Once I've lost the shares - if I go into OMV GUI and then delete the share and recreate, I get a stale handle on client side which I can then force unmount and remount which works fine again.
I've seen a few similar posts but no conclusive solution.