![]() When you specify a domain and SYSVOL or NETLOGON, in addition to performing the same health checks as when you specify a domain, the command checks that the Time To Live (TTL) of SYSVOL or NETLOGON referrals match the default value of 900 seconds.When you specify a domain, the command performs a health check of domain controllers (Dfsdiag /testdcs) and tests the site associations and domain cache of the local host.When you use the DFSPath parameter without arguments, this command validates that the referral list includes all trusted domains.It also verifies that the Online property is set.ĭFSDiag /TestDFSIntegrity /DFSRoot:\MyNamespace /Recurse /FullĬhecks Distributed File System (DFS) referrals by performing the following tests: Full: Verifies the consistency of share and NTFS ACLs and client side configuration on all folder targets. Recurse: Performs the testing including the namespace interlinks. DFSRoot:: The DFS namespace to diagnose. Detects overlapping DFS folders (links), duplicate folders, and folders with overlapping folder targets.ĭFSDiag /TestDFSIntegrity /DFSRoot:.Validates the configuration of access-based enumeration to ensure that it is consistent between DFS metadata and the namespace server share.Checks for DFS metadata corruption or inconsistencies between domain controllers.DFSRoot:: The namespace (DFS root) to diagnose.ĭFSDiag /TestDFSConfig /DFSRoot:\\MyNamespaceĬhecking individual namespace configuration and integrityĬhecks the integrity of the Distributed File System (DFS) namespace by performing the following tests: ![]() Namespace root resource dependency on physical disk resource.Network name resource dependency on IP address resource.Namespace root resource dependency on network name resource.Validates the following dependencies on clustered namespace servers that are running Windows Server 2008 or later:.Verifies that the DFS registry configuration is consistent among namespace servers.Verifies that the DFS Namespace service is running and that its Startup Type is set to Automatic on all namespace servers./Full: Verifies that AD DS and the registry of the server contain the same site association information.ĭFSDiag /TestSites /DFSPath:\Namespace1\Folder1 /FullĭFSDiag /TestSites /DFSPath:\Namespace2 /Recurse /FullĬhecks the configuration of a Distributed File System (DFS) namespace by performing the following actions:./Recurse: Enumerates and verifies the site associations for all folder targets under the specified namespace root./DFSPath:: The namespace root or Distributed File System (DFS) folder (link) with targets for which to verify the site association./Machine:: The name of the server on which to verify the site association.The default value is the local domain that the local host is joined to.Ĭhecks the configuration of Active Directory Domain Services (AD DS) sites by verifying that servers that act as namespace servers or folder (link) targets have the same site associations on all domain controllers. Verifies the consistency of the site association by hostname and IP address.Checks for the support of site-costed referrals for NETLOGON and SYSVOL.Verifies that the Distributed File System (DFS) Namespace service is running and that its Startup Type is set to Automatic.Checking individual namespace configuration and integrity.Ĭhecking Domain Controller (DC) configurationĬhecks the configuration of domain controllers by performing the following tests on each domain controller in the specified domain:.Checking namespace server configuration.Checking domain controller configuration.The tool will exercise the many components related to DFS-N, so it is recommended to experiment with it in a test lab first to assess its impact, before running it in production.ĭFSDIAG can check your configuration in five different ways: It’s called dfsdiag.exe.ĭFSDIAG was introduced in Windows Server 2008 and it was improved in Windows Server 2008 R2 to provide better messages and help text.ĭFSDIAG is not available as an in-box tool for Windows Server 2003, but the tests can run on Windows Server 2008 or Windows Server 2008 R2 while targeting namespace servers running Windows Server 2003. To assist with that, Windows Server provides an in-box tool specifically to help with that. ![]() ![]() The Distributed File System Namespaces (DFS-N) service is a role service of the File Service role for Windows Server.ĭFS-N, as the name implies, is a distributed file system and it involves a number of components running on a set of computers (Active Directory domain controllers, DFS-N namespace servers, SMB file servers, DFS-N clients that are typically Windows clients, but also Linux ones).īecause of that, as you can imagine, diagnosing problems with DFS-N can be challenging. ![]()
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