Home > Hyper-V, Virtualization, Windows Server 2008 > Hyper V Failover Cluster: The disk path is either not available , not accessible or can’t be managed by the cluster

Hyper V Failover Cluster: The disk path is either not available , not accessible or can’t be managed by the cluster


The Hyper-V role enables you to create a virtualized server computing environment using a technology that is part of the Windows Server® 2008 operating system. This solution is provided through Hyper-V. You can use a virtualized computing environment to improve the efficiency of your computing resources by utilizing more of your hardware resources.

The Failover Clustering feature enables you to create and manage failover clusters. A failover cluster is a group of independent computers that work together to increase the availability of applications and services. The clustered servers (called nodes) are connected by physical cables and by software. If one of the cluster nodes fails, another node begins to provide service (a process known as failover). Users experience a minimum of disruptions in service.


When you build your lab by Microsoft document Step-by-Step Guide for Testing Hyper-V and Failover Clustering. You may face that error

The disk path is either not available, not accessible or can’t be managed by the cluster


I tried all solution…Checking the cluster configuration and failover between nodes. No Thing at ALL

After long time of Google it I found the solution:  kb951308

This update incorporates changes in the way that the Windows Server 2008 Failover Cluster Management console functions for the Hyper-V role. These changes provide increased functionality and virtual machine controls that are consistent with the Hyper-V Manager console.

This update changes the Failover Cluster Management console (the Cluadmin.msc file) and the server components of the failover cluster. If this update is installed on one node, it should be installed on all nodes of a Windows Server 2008 failover cluster. It may be installed on one node at a time. However, we recommend having all the nodes updated in a reasonable time. You may experience errors on a Failover Cluster Manager that has not been updated to a failover cluster that has had this update applied. These errors occur because of differences between the non-updated Cluadmin.msc file and the updated failover cluster.  Here we have the important part:

Allow for more than one virtual machine in a “Services or Applications” group
Before you install this update, only one virtual machine can be selected in the High Availability Wizard. Additionally, there is no method that you can use to add a virtual machine to a Services or Applications group by using the Failover Cluster Management console. After you install this update, the Failover Cluster Management console allows for more than one virtual machine. The High Availability Role Wizard for virtual machines identifies virtual machines that have files on the same disk and enables those virtual machines to be configured for High Availability. Therefore, the virtual machines will be in the same Services and Applications group. If the Services and Applications group moves to another node, all the virtual machines in that group are also moved.

After Apply the hotfix on both nodes and restart the cluster service on both..Opsss It works… Enjoy building your virtual lab

Later I would provide guide to build enterprise infrastructure using Hyper V Failover Cluster

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