Microsoft has updated its excellent Fast Track ( Microsoft Data Warehouse reference architecture) white paper for latest versoin of SQL Server (2012). Whether you decide to follow this architecture or not (and there are good reasons for and against it given your budget and objectives), you will find a wealth of great and useful information that will help you understand all aspects of your data warehousing projects – capacity planning, network, storage, partitioning, physical database design and server configuration among many others.