Newer writes that have started in my Ubuntu based setup since this guide was first written:
/run/samba/msg.lock/ (multiple files)
/var/lib/mosquitto/ (mosquitto.db and mosquitto.db.new)
/var/lib/ntp/ (ntp.drift.TEMP and ntp.drift)
/var/lib/openhab2/jsondb/org.eclipse.smarthome.config.discovery.DiscoveryResult.json
/var/lib/openhab2/jsondb/backup/ (multiple files)
Since I am no longer using Openhabian I can’t confirm or test any ‘fixes’ for them. I now use my install script for my Odroid C2 found here to shut down the writes and this is done in a number of ways. You can open the install script in a text editor and read how I handle these files as I test and implement a work around to stop the writes.