upgrade windows 2012 Sp1 to windows 2012 R2 With SQL cluster

I have a task of upgrading Windows 2012 server to Windows 2012 R2. The servers are 2 node SQL cluster.
Can any one let know if there is any white paper which i could follow to upgrade the servers. If not white paper, what is procedure for upgrading the servers.
avik4worldAsked:
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lcohanDatabase AnalystCommented:
Looks like this is indeed a supported upgrade path as per https://technet.microsoft.com/en-ca/library/dn530781.aspx therefor you should be able to follow "In-Place Migration for a Two-Node Cluster: Migration to Windows Server 2012 R2" from https://technet.microsoft.com/en-ca/library/dn530785.aspx
Cliff GaliherCommented:
2012 R2 is not just a service pack (since your subject line referred to an "SP1" that doesn't exist.)

You can't just upgrade cluster nodes from 2012 to 2012 R2. You'll need to build a new cluster.

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Vitor MontalvãoMSSQL Senior EngineerCommented:
avik4world, do you still need help with this question?
avik4worldAuthor Commented:
Well, after a long discussion with client and Microsoft, we have decided to build a new cluster with windows 2012 R2 and installed SQL 2014 on top of it. Once the new cluster is ready the data will be moved from OLD to new.
we though of using cluster role migration wizard , but that would not move the SQL cluster :-(. so that option was ruled out
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Windows Server 2012

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