I'm working on migrating a 3x host "2008 R2" Hyper-V Cluster to a 2x host "2012 R2" Cluster. We'll not be re-using the current hosts, we have 2 new servers.
Current cluster is connected to a Compellent FC SAN, 1x CSV volume and 1x Quorum drive mapped (presented) to all 3x hosts.
One of the VM has a large pass-through disk (E:\) and it is clustered as well. Live-Migration between hosts works with all VMs including VM with this pass-through disk.
The new 2012 hosts are also connected to the same SAN but nothing is presented to them yet. They don't have the cluster roles installed yet.
I came across below blog post. The idea of cloning (replay) the CSV volume in SAN and using that during the migration instead of touching the current cluster config seems safer way to go. I'd like to be able to go back to the old cluster if something goes wrong or migration fails.
I'd like to know if anyone has done it this way, any recommendations or suggestions about that. I can't find any other step-by step instructions about this method anywhere.
I'm also concerned about the VM with pass-through disk, it's 1.2TB in size. I'm hoping that after I migrate all the VMs, I'll move this volume to the new hosts, add it to the cluster, and attach it to the same VM. Has anyone done it and would like to share how they did it?
Thank you in advance..