Microsoft Failover Cluster File Share Witness and DFS
This blog discusses a new feature in the upcoming release of Windows Server 2019.
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One of the quorum models for Failover Clustering is the ability to use a file share as a witness resource. As a recap, the File Share Witness is designated a vote in the Cluster when needed and can act as a tie breaker in case there is ever a split between nodes (mainly seen in multi-site scenarios).
However, over the years, we have seen where this share is put on a DFS Share. This is an awfully bad idea and one not supported by Microsoft. Please do not misunderstand that this is a stance against DFS. DFS is a great feature with numerous deployments out there. I am specifically talking about putting a cluster File Share Witness on a DFS share.
Read the entire article here, Failover Cluster File Share Witness and DFS
Via the fine folks at Microsoft.