Upgrading cluster to 2012 R2

[Eson]

Im going to reinstall four hosts in cluster thats on 2012 to 2012 R2. Im going to use the copy cluster wizard. What do I need to do in Veeam after this? I have my jobs mapped to CSV-volumes. Will these mappings still work when the host will have the same names and I have installed the Veeam-agents on the hosts?

Or do I have to recreate all the jobs? I guess that Veeam will at least map to the backed up data and the VMs?

[Vitaliy S.]

Do you plan to add new hosts to this cluster and then decommission old ones or this is going to be a completely new cluster but connected to the same CSV storage?

[Eson]

Reinstall the four existing hosts and the reconnect them to the same CSV storage.

[Vitaliy S.]

In this case you will need to re-add VMs to the job and do VM backup files mapping, keep in mind that backup jobs will not be incremental, since CBT data is stored on the host nodes.

[Eson]

Ok, but they will be incremental in the sense that they will only copy changed data but the job will have to read through the entire VHD right?

[Vitaliy S.]

It depends. If you preserved VM ID during VM import operation, then your job will start an incremental job pass, otherwise full backup will be performed.