@matt1: Thank you for your detailed answer. I am using a Raspi 3 with no overclocking, nothing in its USB plugs, 16 GB Sandisk SDCard with 81% free (root), RAM 66% free, Swap 100% free, CPU load 1-2% typ.
My persistence is rrd4j, once a minute, two values.
Here is a log of accesses in about one minute.
Watches established.
/srv/openhab2-logs/ MODIFY events.log
/srv/openhab2-logs/ MODIFY events.log
/srv/openhab2-logs/ MODIFY events.log
/srv/openhab2-logs/ MODIFY events.log
/srv/openhab2-logs/ MODIFY events.log
/var/lib/samba/ CREATE wins.dat.2113
/var/lib/samba/ MODIFY wins.dat.2113
/var/lib/samba/ CLOSE_WRITE,CLOSE wins.dat.2113
/var/lib/samba/ ATTRIB wins.dat.2113
/var/lib/samba/ DELETE wins.dat
/var/lib/samba/ MOVED_FROM wins.dat.2113
/var/lib/samba/ MOVED_TO wins.dat
/srv/openhab2-logs/ MODIFY events.log
/srv/openhab2-logs/ MODIFY events.log
/var/lib/samba/ CREATE wins.dat.2136
/var/lib/samba/ MODIFY wins.dat.2136
/var/lib/samba/ CLOSE_WRITE,CLOSE wins.dat.2136
/var/lib/samba/ ATTRIB wins.dat.2136
/var/lib/samba/ DELETE wins.dat
/var/lib/samba/ MOVED_FROM wins.dat.2136
/var/lib/samba/ MOVED_TO wins.dat
/srv/openhab2-logs/ MODIFY events.log
/var/cache/samba/lck/ CREATE 2143
/var/cache/samba/lck/ MODIFY 2143
/var/cache/samba/lck/ DELETE 2143
/var/cache/samba/lck/ CLOSE_WRITE,CLOSE 2143
/srv/openhab2-userdata/persistence/rrd4j/ CLOSE_WRITE,CLOSE Robo_Battery_Batterieladung.rrd
/var/lib/samba/ CREATE wins.dat.2167
/var/lib/samba/ MODIFY wins.dat.2167
/var/lib/samba/ CLOSE_WRITE,CLOSE wins.dat.2167
/var/lib/samba/ ATTRIB wins.dat.2167
/var/lib/samba/ DELETE wins.dat
/var/lib/samba/ MOVED_FROM wins.dat.2167
/var/lib/samba/ MOVED_TO wins.dat
/srv/openhab2-logs/ MODIFY events.log
My problem is as follows, as detailed here. Once in two or more months I cannot access openhabian by ssh port 22 any longer. Openhab is still running, but no more access to openhabian. Thus, I cannot do a soft shutdown. Disconnecting and connecting the power plug does not help, and installation soon fails completely and needs reflashing. Now, I use the systeminfo binding to monitor system ressources in my sitemap.
For my use case, lost logs or persistence data are not as critical as failed Openhab operation. Therefore, your approach possibly could help provided it is in fact a disk corrruption issue.