Cluster Migration and Upgrades
If an organization currently supports Windows Server 2003 clusters, the nodes in the cluster cannot be upgraded to Windows Server 2012 failover cluster nodes. This is mainly because the requirements of Windows Server 2003 server clusters and Windows Server 2012 failover clusters are very different. Even hardware requirements between Windows Server 2008 or 2008 R2 and Windows Server 2012 are different in terms of what actual configurations have been tested and are certified for failover clusters on each operating system version. Windows Server 2012 does provide a tool that can be used to collect data and migrate built-in Windows services between Windows Server 2008 or 2008 R2 or Windows Server 2012 failover clusters ...
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