At '%8' database copy '%1' on this server detected a Hung IO and enforced process termination. To help identify the specific ...

At '%8' database copy '%1' on this server detected a Hung IO and enforced process termination.  To help identify the specific failure, consult the Event log on the server for other storage and "ExchangeStoreDb" events. Service recovery was attempted by failover to another copy. Failover was unsuccessful in restoring the service. Error: %7