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IBM DS8870 Architecture and Implementation by Bruce Wilson, Axel Westphal, Abilio de Oliveira, Peter Kimmel, Jean Iyabi, Scott Helmick, Andre Candra, Bertrand Dufrasne

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Virtualization concepts
This chapter describes virtualization concepts as they apply to the DS8000.
The following topics are covered:
 – Array sites
 – Arrays
 – Ranks
 – Extent pools
 – Track space-efficient volumes
 – Logical subsystems (LSSs)
 – Volume access

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