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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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Scaling Storage with Virtualization

Virtualization is a powerful storage tool that encompasses many other technologies and techniques, including RAID. The power of virtualization comes from its ability to create scalable storage by utilizing the flexibility of SAN connections. This section examines the fundamental ways virtualization applies simple geometric connection flexibility to build scalable storage.

The Virtualization “Lens”

To make it easier to discuss storage virtualization processes, we will use the word “lens” to pinpoint functions at a certain point in the I/O path. Just like an optical lens is used to define the scope and range of a visual image, the storage virtualization lens narrows or widens the “view” of block addresses in ...

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