as of my problem with Helios4 rebooting on heavy NFS load I couldn't make any progress, even worse it even stopped booting. Disabling watchdog did not help as serial also freezes and I was unable to do anything, there was no even blinking LED as I remember. That forced me to use another SD card with fresh official Debian 10 installation image and configure it once again.
There is only basic configuration, only SSSD for LDAP and NFS server, no docker and no http services but NAS runs rock solid for 6 days now even it's some cheep 4GB uSD card.
So I still don't know if it's previ