I have been running SQL Server 2005 server side traces to address some SQL Server 2005 performance issues. I have noticed an unusual trace session that is running. I know I have not been running this trace and know I have been diligent about running only a single trace to not impact performance. So where did this trace session coming from? SQL Server 2005 is running a default trace. You can think of this as a replacement to the black box mode trace that could have been run in SQL Server 2000 where the last 5 MB of data is captured.