Raid Implementation - IBM DS8880 Series Introduction And Planning Manual

Array Site
Figure 10. Logical configuration sequence

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
Rank
Extents
Virtualization
Extent Pool
Logical Volume
Array
= CKD Mod1 Extent in IBM
System z environments
= FB 1GB in an Open
systems Host
Volume Groups
Map Hosts to
Volumes
Volume Group
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Chapter 1. Overview