Failover Cluster File Share Witness and DFS

This blog discusses a new feature in the upcoming release of Windows Server 2019. Currently, Windows Insiders receive current builds of Server 2019. We urge you to become an Insider and play a part in making Windows Server 2019 the best that it can be. To do so, go to this link and sign up…. Read more

How to Switch a Failover Cluster to a New Domain

This blog discusses a new feature in the upcoming release of Windows Server 2019.  Currently, Windows Insiders receive current builds of Server 2019.  We urge you to become an Insider and play a part in making Windows Server 2019 the best that it can be.  To do so, go to this link and sign up…. Read more

Failover Clustering Sessions @ Ignite 2015 in Chicago

If you are going to Ignite 2015 in Chicago next week, here are the cluster related sessions you might want to check out.  We’ll be talking about some exciting new enhancements coming in vNext.  Weren’t able to make it this year?  Don’t worry, you can stream live all the sessions and they are also recorded so that you… Read more

Understanding the Repair Active Directory Object Recovery Action

One of the responsibilities of cluster Network Name resource is to rotate the password of the computer object in Active Directory associated with it.  When the Network Name resource is online, it will rotate the password according to domain and local machine policy (which is 30 days by default).  If the password is different from what is stored in… Read more

Failover Clustering Sessions @ TechEd 2013

If you were not able to make it to TechEd 2013 this year, you can still watch the sessions and learn about the new enhancements coming.  Here’s links to the recorded cluster sessions at TechEd 2013: Continuous Availability: Deploying and Managing Clusters Using Windows Server 2012 R2https://channel9.msdn.com/Events/TechEd/NorthAmerica/2013/MDC-B305#fbid=WOoBzkT2vlt Failover Cluster Networking Essentialshttps://channel9.msdn.com/Events/TechEd/NorthAmerica/2013/MDC-B337#fbid=WOoBzkT2vlt Upgrading Your Private Cloud with… Read more

Validate Storage Spaces Persistent Reservation Test Results with Warning

I have seen questions from customers who get a warning in the results of their failover cluster validation that indicates the storage doesn’t support persistent reservations for Storage Spaces. They want to know why they got the warning, what it means, and what should they do about it. First, here is the text you will… Read more

MSMQ Errors in the Cluster.log

After using the Get-ClusterLog cmdlet to generate the Cluster.log, you may notice the following errors and warnings in the cluster log: ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)’ because of ‘Startup routine for ResType MSMQ returned 21.’ WARN  [RCM] Failed to load restype ‘MSMQ’: error 21. ERR   [RHS] s_RhsRpcCreateResType: ERROR_NOT_READY(21)’ because of ‘Startup routine for ResType MSMQTriggers returned 21.’… Read more

Configuring How VMs Are Moved when a Node is Drained

Introducing some concepts: Windows Server 2012 introduced the ability to drain a node, which is sometimes also referred to as Node Maintenance Mode.  When you drain a node, the Windows Server Failover Cluster will Pause the node to prevent any new VMs from moving to that node, then it will automatically move virtual machines (VMs)… Read more

Understanding how Failover Clustering Recovers from Unresponsive Resources

In this blog I will discuss how Failover Clustering communicates with cluster resources, along with how clustering detects and recovers when something goes wrong.  For the sake of simplicity I will use a Virtual Machine as an example throughout this blog, but the logic is generic and applies to all workloads. When a Virtual Machine… Read more

Tuning Failover Cluster Network Thresholds

Windows Server Failover Clustering is a high availability platform that is constantly monitoring the network connections and health of the nodes in a cluster.  If a node is not reachable over the network, then recovery action is taken to recover and bring applications and services online on another node in the cluster. Failover Clustering by… Read more