Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

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:

  • Topology

  • Server Reference Table

  • Server Host Table

  • Server Inbound/Outbound partners

  • Summary

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. For more information on FRS and Active Directory replication, see the Microsoft Windows Server 2003 Resource Kit.

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:

  • Windows 2000 Server or Windows Server 2003

  • PERL 5.005 521e or 522e

Files Required

  • Topchk.cmd

  • Ntfrsutl.exe

See Also


Topchk Remarks
Topchk Syntax
Topchk Examples
Alphabetical List of Tools
Rsdir Overview
Rsdiag Overview
Iologsum Overview
Health_chk Overview
Ftonline Overview
Filever Overview
Efsinfo Overview
Dmdiag Overview
Dskprobe Overview
Diruse Overview
Dfsutil Overview
Connstat Overview
Cabarc Overview
Bitsadmin Overview