5 Chapter 5. Tiers of storage In this chapter we describe the different data storage products from IBM System Storage. They can be utilized to build a tiered storage environment to support an Information Lifecycle Management (ILM) solution. IBM offers several other storage products, for instance, through the server brands. These offerings can be, like any other storage solution, a valid storage tier. The reason why they are not described here is because it is not our objective in this book to give a complete overview of all available storage products. However, the products in this chapter can be seen as the most common components for a tiered storage solution.