Hi solo,
Another thing: i've constated when i reboot rasp, i loose nginx configuration (listen 80;) in /etc/nginx/sites-available/openmediavault-webgui, and therefore no connexion with my browser and i loose too ssh: i must restart sshd. Luckily, i've installed tightVnc and RealVnc.
And also, after several minutes, same thing: the openmediavault-webgui script loose [listen 80;] and i'm deconnected.
Thank