The rest of the chapter looks at a couple of different remote copy designs.
In this example a company has two data centers in the same region or city. Each of them has primary storage and uses the other for secondary storage in a remote copy system.
Figure 10-7 shows two sites named East and West. Both sites have storage and remote copy controllers providing forwarding and receiving roles. If one site experiences a problem, the work resumes at the other site. Companies with multiple data centers sometimes use this type of arrangement because they have full-time staff available in both locations.