Storage Access Methods
3B.0 STORAGE CONNECTIVITY: DAS, SAN, AND NAS
This chapter studies the three common methods for servers and clients1 to connect to a storage subsystem. The previous chapter outlined the basics of storage systems and this one adds the dimension of connectivity between clients/servers and storage. You may need to bounce between the two chapters, as many of the concepts discussed are so intimately related. Common ways to illustrate the three key methods are shown in Figure 3B.1. This illustration is a bit poetic, as in reality some of the layers are very thin. But that is okay; it is a great place to start our discussion. In the final section of this chapter, Figure 3B.1 is revisited with some flesh added to more ...