> since starting to upgrade some nodes to PVE 4.x i've seen that a lot of > them have a failed service watchdog-mux. > > Is there any reasons why this one is enabled by default? This is required if you use HA. > Dec 05 14:57:34 node1 watchdog-mux[1551]: watchdog open: No such file or > directory What happened to /dev/watchdog?