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Storage Networking Fundamentals: An Introduction to Storage Devices, Subsystems, Applications, Management, and Filing Systems by Marc Farley

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Redundant I/O Path Elements

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

  • Subsystem ports

  • Subsystem interconnects

We'll look at each of these in the following sections.

Redundant Server Systems

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 ...

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