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Inconsistencies with Access Based Enumeration (ABE) of the namespace and of the namespace share Overlapping folders, folder targets, and duplicated folders Inconsistent Active Directory metadata between the domain's domain controllers (may indicate replication latencies or failures) Inconsistent registry settings for the DFSN service compared between namespace servers Invalid site associations of the system running DFSDiag locally or of any targets defined in the namespace Inaccessible file servers because they have inconsistent NTFS and share permissions when compared to other targets of the DFSN folder Offline file servers, domain controllers, and DFSN servers (Helpful in detecting retired servers that are still referenced within the namespace!) ), I will mention the key issues it detects within an environment: While there have been a few other blog posts about DFSdiag (look Lastly, it supports both domain-based and standalone namespaces. If possible, use the Windows 7 or 2008 R2 version of DFSDiag-it contains additional help text describing each option. In addition, you may leverage the tool in an environment consisting of Windows Server 2003 domain controllers and namespace servers, but you will need at least one of the later OS's to run DFSDiag. For any 2008 or 2008 R2 systems not hosting the DFS Namespaces service, you will need to install the Distributed File System Tools found in the Remote Server Administration Tools (RSAT) by using Server Manager. DFSDiag is available in Windows Vista, Server 2008, 7, and 2008 R2. I have written the information below to provide such methods.įirst, the administrator of any environment with namespaces should routinely run the DFS Diagnostics (

Depending on the size and quantity of namespaces, you may be wondering about the methods available to monitor the health of namespaces and ensure their proper function.

In large environments, DFS Namespaces may stretch across many sites and target tens or hundreds of file servers. If you are reading this post, you likely have Distributed File System Namespaces (DFSN) deployed or are at least considering it. First published on TechNet on Feb 03, 2011