Currently, we are maintaining two Windows Server 2008 R2 file clusters, i.e. staff and students. Now, we want to upgrade/migrate them to Windows Server 2012 R2. Our storage is SAN based (fiber). Its shares are mapped to file servers.
Now, in regards to planning, where should I start? Is there any major difference between Windows Server 2008 R2 and Windows Server 2012 R2 file clusters?