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I"m working on migrating our 2012 Failover cluster to 2012 R2. I’ve got a few nodes running R2 and setup the new cluster. I however, can not get it connected to the shared storage. Does this have something to do with it alreadybeing connected on another cluster? I’m working off of this guide:

It definitely seems possible according to the guide but I’m unable to add the volumes on the new cluster. When I make the iSCSI connection and bring the drive online its shown as “RAW”. What am I missing?

3 Spice ups
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I’m actually having a very similar configuration / problem going from 2008 R2 cluster to 2012 R2 cluster. Showing up as RAW for me as well, so very interested (frustrated) in this topic.

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Wayray, I played around with this some more the other day, and had a different Hyper-V post over on Technet where someone helped explain. CSV can only be mounted by a single cluster at a time, it will show as RAW if a second cluster tries to mount it. This is by design.

So if you wanted to move some Machines to a new cluster you need to move the whole CSV at once. The process would basically be:

  1. Use Copy Cluster Roles to Copy the Roles from the Old cluster to the new.
  2. Take CSV Offline on Old Cluster
  3. Bring CSV online on New Cluster

I personally am not able to Migrate an Entire CSV at once. So what i’ve been doing is:

  1. Created a new CSV on New Cluster
  2. Shut down machine on Old Cluster
  3. Copy Machine from Old Cluster CSV to new Cluster CSV (regular file explorer copy and paste)
  4. Open Hyper-V manager on New cluster Node and Import VM from the new cluster’s csv.
  5. Configure High Availability to add VM to cluster
  6. Delete machine from old cluster.