The concept of the I/O path was introduced in Chapter 3, “Getting Down with Storage I/O,” as a way to understand the complete picture of how data is transferred between systems and storage. Redundancy can be applied to all the physical components of the path, including
Host server systems
HBAs and cables
Network equipment and routes
We'll look at each of these in the following sections.
Infrastructures for data access necessarily include options for redundant server systems. While server systems might not necessarily be thought of as storage elements, they are clearly key pieces of data access infrastructures. From a storage I/O perspective, servers are the ...