Hello All,
Over the weekend my exchange server rebooted automatically and during that period I was seeing this error in the event logs not sure what exactly happened
At '8/12/2018 4:02:03 AM' the Exchange store database 'DB11' copy on this server detected a Hung IO and logged an event. For more details about the failure, consult the Event log on the server for other storage and "ExchangeStoreDb" events