Recover your virtual domain controller inside a CSV if Hyper-V failover cluster fails

Workaround to take back DC VM from CSV.

1. At this moment, your cluster is offline and failed due to its inability to connect to a Domain Controller.
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2. Go to Cluster Shared Volume, select the Cluster volume which contained the VHD.
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3.Offline the resources, right click and select Remove from Cluster Shared Volumes.
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4. Once remove, go to Storage and you will see the disk located in Available Storage. Assign a Drive Letter and copy the VHD out.

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This is the simple trick to recover the DC VM which is inside the CSV. Hopefully, you can now create the a new VM and point towards the copied VHD then start the Domain Controller. Once the DC is up, then you will be able to start the Hyper-V Failover Cluster.

Just to remind again, you should have at least 1 DC not in CSV or run in the physical server.

Source: http://www.ms4u.info/2011/08/recover-domain-controller-virtual.html

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