hi, thanks, i found the failure. It occured during a app (talk sfu) update. Before the app is updated the current state is backuped. During this, something happend with the backup disk and the server freezed.
this was 2h after a normal backup, were everything was fine.
The disk is ok, i checked the intergrety.
what i now did is , do toogle the server to a restart when this happens again. I will monitor this and give feedback if this happens again.