Topchk.cmd: DFS and SYSVOL Replication Topology Analysis Tool

This command-line tool processes the output generated when the NtfrsUtl tool is run with the ds parameter. Using the NtfrsUtl ds output as its data source, TopChk creates a report that summarizes the replication topology of one or more replica sets. This report includes the following information:

Corresponding UI

There is no corresponding user interface for this tool.


The File Replication Service (FRS), first introduced in Windows 2000, is an essential element of the Microsoft Active Directory technologies. The Active Directory service uses FRS for SYSVOL replication. FRS can also be used with the Microsoft Distributed File System (DFS) technologies for automatic replication of content between alternating targets.

Running NtrfsUtl ds produces output listing the raw definition of the FRS replication topology stored in Active Directory. A replica set consists of two or more computers configured to replicate the contents of a file folder. The individual computers are referred to as replica members.

System Requirements

The following are the system requirements for TopChk:

Files Required

Related Topics