At '%8' database copy '%1' on this server appears to have an I/O error that it may be able to repair. To help identify the ...

At '%8' database copy '%1' on this server appears to have an I/O error that it may be able to repair.  To help identify the failure, consult the Event log on the server for other storage and "ExchangeStoreDb" events. Service recovery was attempted by failover to another copy. The failover was unsuccessful in restoring the service because of the following error: '%7.