Bump.
Observed in newly-purchased DNS-320L (shipped with firmware 1.01, upgraded to 1.03b4).
Seeing serveral (sporadic) entries in the log looking like:
Nov 18 13:25:08 Fan Is Unable To Spin Or Fan Doesn't Exist.
Fan is working OK; I can see/hear it spinning and feel the air flow. And temperature sensors on motherboard and hard disks report normal temperatures around 38-40 deg.C.
Fan setting in web UI is default "auto" (off/low/high); most of my "unwanted" log entries seem to be after a transition from "OFF" to "LOW"
Regards,
Richard