Optimization Of Volume Configurations - Fujitsu ETERNUS DX60 S3 Overview Manual

Chapter 3 Functions
3.3

Optimization of Volume Configurations

3.3 Optimization of Volume Configurations
This section explains the functions that optimize volume configurations according to the customer's environ-
ment.
The ETERNUS DX allows for the expansion of volumes and RAID group capacities, migration among RAID
groups, and changing of RAID levels according to changes in the operation load and performance conditions
without interruption to data.
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Expansion of Volume Capacity
Volume capacity expansion is possible by using RAID Migration to move a volume to a RAID group that has
enough free space.
Volume capacity expansion is also possible by using LUN Concatenation to add areas of free space to an ex-
isting volume.
■
Expansion of RAID Group Capacity
The existing RAID group capacity can be expanded by adding drives to the RAID group with Logical Device
Expansion.
■
Migration Among RAID Groups
Migration of a volume to another RAID group is possible by using RAID Migration.
■
Changing the RAID Level
Changing of the RAID level is possible by using RAID Migration to migrate to a RAID group with a different
RAID level.
Logical Device Expansion can also be used to change the RAID level. Drives can be added while the RAID
level is being changed.
■
Striping for Multiple RAID Groups
Server I/O access performance can be improved by distributing the allocation of a volume across multiple
RAID groups with Wide Striping.
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FUJITSU Storage ETERNUS DX60 S3 Disk storage system Overview
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