In this paper, we examine the new technology of data deduplication. Data deduplication, or dedupe for short, can yield enormous savings, making disk-to-disk backup more feasible. However, not all deduplication technologies are equal. We will look at the different approaches to data deduplication, as well as the costs and benefits of each. In this context, we will present Dell's Ocarina Deduplication technology and demonstrate why it is a best-of-breed choice to handle your data deduplication.