IBM DS8870 Architecture and Implementation

Virtualization concepts

This chapter describes virtualization concepts as they apply to the DS8000.

The following topics are covered:

•Virtualization definition

•The abstraction layers for disk virtualization:

 – Array sites

 – Arrays

 – Ranks

 – Extent pools

 – Dynamic extent pool merge

 – Track space-efficient volumes

 – Logical subsystems (LSSs)

 – Volume access

 – Virtualization hierarchy summary

•Benefits of virtualization

•zDAC: z/OS FICON Discovery and Auto-Configuration

•EAV V2: Extended address volumes ...