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Figure 2-47:
All nodes upgraded 
After this process is complete, your cluster operating system has been upgraded on all nodes and is 
fully functional for running Hyper-V and SOFS clusters. During this process, there was no downtime; 
all services were available. Because there are VMs and file shares that are configured with functionality 
from Windows Server 2012 R2, there are still a few steps on the cluster to get all of the functionality of 
Windows Server 2016. 
If you look at the VMs in Hyper-V Manager, you can see that the version number of the VM is 5.0, as 
illustrated in Figure 2-48. 
Figure 2-48:
VM Version number 
This indicates Windows Server 2012 R2 configuration for that VM. To upgrade the Hyper-V 
configuration version for each VM during your next maintenance window, you can run the Get-VM 
cmdlet followed by Update-VMConfigurationVersion, as shown in Figure 2-49. 
Figure 2-49:
Updating VM Configuration 
This will change the VM configuration version to 6.1 and turn on all new features available for Hyper-V 
in Windows Server 2016, as shown on the Summary tab of the VM depicted in Figure 2-50. 

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CHAPTER 2 | Software-defined datacenter 
Figure 2-50:
VM Configuration Version 
For SOFS servers that have completed the cluster operating system rolling upgrade process, you 
will also want to upgrade the functionality of the storage pools. They will still be limited to the 
functionality in Windows Server 2012 R2 until you run the Update-StoragePool cmdlet. Specify the 
name of the storage pool that you want to update in this process. 
When you have completed the cluster operating system rolling upgrade on all nodes, updated the 
cluster functional level, and updated the VM configuration version and storage pool to Windows 
Server 2016 functionality, you are all done! 
Gone are the days when you needed to create a new cluster and recreate or move workloads. Cluster 
operating system rolling update simplifies long-term cluster management and makes those 
complexities a thing of the past.