IBM DS8880 Series, Introduction And Planning Manual

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RAID implementation
RAID implementation improves data storage reliability and performance.
Redundant array of independent disks (RAID) is a method of configuring multiple
drives in a storage subsystem for high availability and high performance. The
collection of two or more drives presents the image of a single drive to the system.
If a single device failure occurs, data can be read or regenerated from the other
drives in the array.
Disk
Array Site
Array
Rank
Extents
= CKD Mod1 Extent in IBM
System z environments
= FB 1GB in an Open
systems Host
Virtualization
Extent Pool
Extents
Logical Volume
Volume Group
Volume Groups
Map Hosts to
Volumes
f2d00137
Figure 10. Logical configuration sequence
Chapter 1. Overview
31