Article ID: 297935 - View products that this article applies to.
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This article describes how to force the removal of read-only naming contexts from a domain controller on Microsoft Windows 2000-based computers, and Microsoft Windows Server 2003-based computers.
When a domain controller, which had been, but is no longer, a global catalog server, the Knowledge Consistency Checker (KCC) is responsible for the removal of the read-only naming contexts on the domain controller that is no longer replicated. By default, the KCC removes 500 objects every time it runs, which is every 15 minutes (by default). In a large forest, a domain controller can take a considerable amount of time to remove all read-only naming contexts.
To determine if a domain controller is in the process of removing read-only naming contexts, examine the Directory Service event log file for the following event:
You can use the Repadmin.exe tool from Windows 2000 Support Tools to speed up this process by means of a batch file. The batch file must be run on the console of the domain controller (that is no longer a global catalog) to remove the read-only naming contexts.
Event Type: Information
Event Source: NTDS KCC
Event Category: Knowledge Consistency Checker
Event ID: 1069
Description: Incremental progress has been made in removing the remainder of the objects from domain DC=xpchild,DC=travisa2000,DC=local from the local server. Further progress will be made on the next execution of the Knowledge Consistency Checker (KCC).
Note For Windows Server 2003, the Repadmin.exe tool is located in the Support\Tools\Suptools.msi file on the Windows Server 2003 installation media.
In the following sample version of a Ungc.bat file, the name of the domain controller that needs to be "cleaned up" is "dc1.corp.company.com". The read-only naming contexts that are being removed from this domain controller are: Northamerica.corp.company.com, europe.corp.company.com, and asia.corp.company.com
A sample of the code in the Ungc.bat file:
Article ID: 297935 - Last Review: January 11, 2015 - Revision: 3.0