The Exchange Writer for Exchange 2013 will list Recovery Databases (RDB) in it's writer metadata. These should be ignored. This is a known issue in Exchange 2013 RTM. This issue is addressed in the next update to Exchange 2013.

For some reason I can never remember how to enable logging for the Exchange Writer on Exchange 2007. Here is the Powershell command that does it for you: For the Store Writer: Set-EventLogLevel "MSExchangeIS\9002 System\Exchange Writer" -Level High For the Replication Writer: Set-EventLogLevel...