When SQL Server Express 2005 is protected by Neverfail Heartbeat, the following file filter may be reappended by the Filter Discovery tool every time it executes:
C:\PROGRAM FILES\MICROSOFT SQL SERVER\MSSQL.1\MSSQL\DATA\**
This occurs only when the following conditions are both met:
- A default instance of SQL Server 2005 Express is installed.
- This is the only filter protecting SQL Server data / transaction log files. If SQL Server data / transaction log files are added in a new protected location, this does not occur once the new filters are discovered.
The issue is benign. The persistent readdition of the filters does not trigger a File System Filter Change Check Task, so there is no additional file synchronization load incurred. Filter Discovery for all other file locations work correctly.