Logical Device Expansion; Figure 5.12 Example Of Logical Device Expansion 1 - Fujitsu ETERNUS DX80 S2 Overview

Chapter 5 Basic Functions
5.3 Optimization of Volume Configurations
5.3.2

Logical Device Expansion

Logical Device Expansion (RAID Group Expansion) allows the capacity of an existing RAID group to be
dynamically expanded by the addition of extra drives. By using Logical Device Expansion to expand the
capacity of existing RAID group, a new volume can be added without having to add new RAID groups.
The following examples show Logical Device Expansion:
• RAID5(3+1) configuration converted to a RAID5(4+1) configuration by the addition of an extra drive

Figure 5.12 Example of Logical Device Expansion 1

RAID5(3+1)
300GB 300GB 300GB 300GB
Volume 0
Volume 1
RAID5(4+1)
300GB 300GB 300GB 300GB
Volume 0
Volume 1
Volume 2
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
Copyright 2013 FUJITSU LIMITED
Unused
300GB
300GB
Add and define Volume 2
in the free space.
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P3AM-4812-11ENZ0