Windows Failover Clustering Services (WFCS) Disks not coming online after VM Migration

Ethan Gart 10 Reputation points


We have a VMware environment which has a 2 Node Cluster of VMs on Windows Server 2012R2 . These two VMs are on different ESXi hosts, both of which are running version 6.7 . When attempting to migrate these to ESXi host version 7.0, the shared disks in the Windows cluster are not coming back online, however they run just fine on the previous hypervisor version . VMWare support has informed us that there should be no compatibility issues on their end, and the issue is on Microsoft's end. After numerous troubleshooting, I'm still left empty handed without any solution and could definitely use some help and suggestions.

Thank you,


Windows Server 2012
Windows Server 2012
A Microsoft server operating system that supports enterprise-level management, data storage, applications, and communications.
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Windows Server Clustering
Windows Server Clustering
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Clustering: The grouping of multiple servers in a way that allows them to appear to be a single unit to client computers on a network. Clustering is a means of increasing network capacity, providing live backup in case one of the servers fails, and improving data security.
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  1. Limitless Technology 43,966 Reputation points

    Hi. Thank you for your question and reaching out. I’d be more than happy to help you with your query.

    Following VM migration, if Windows Failover Clustering Services (WFCS) disks do not start up, one of the following conditions may not be satisfied:

    1. Make sure the VM is set up properly in the cluster setup.
    2. Ensure that the ports required for accessing the VM are open.
    3. Verify that the services needed to access the disks are running and that the VM is running.
    4. Verify that the user credentials you are using for authentication are legitimate and have the necessary access rights to the drives.
    5. Make that your firewall, if you're using one, is set up to permit access to the VM.
    6. Verify that the Cluster is utilizing the appropriate storage type, such as Direct-Attached Storage, iSCSI, or Fiber Channel.
    7. Make that the Cluster Shared Volumes (CSV) are correctly configured.
    8. Ensure that the storage system can be reached by the Cluster nodes.
    9. Make that the proper routing is configured if the disks are in a separate subnet.

    If the reply was helpful, please don’t forget to upvote or accept as answer, thank you.

    1 person found this answer helpful.

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