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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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Summary

Systems depend heavily on access to storage and data. When data access is stopped, systems stop working. Therefore, it's important to maintain data access. Connection redundancy improves data availability in SANs by creating multiple options for server-to-storage connections.

Hardware components such as HBAs, cables, and switches are often duplicated to allow uninterrupted operations following a component failure. SAN storage subsystems typically have multiple ports that can be used for redundant connections.

Dynamic multipathing software manages the processes of recognizing I/O transmission failures and failing over to a redundant path. The paths used by multipathing software are defined by the host initiator, the subsystem port/LUN ...

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