FUJITSU Storage ETERNUS DX Configuration Guide (Web GUI)
Copyright 2014 FUJITSU LIMITED P2X0-1250-06ENZ0
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Chapter 4
Configuration Settings for RAID Groups
or Thin Provisioning
This chapter describes the RAID group settings for Standard volumes and Snap Data volumes. This chapter
also describes the Thin Provisioning Pool settings for Thin Provisioning volumes.
4.1 Usage for RAID Groups and Thin Provisioning
This section describes usage for RAID Groups and Thin Provisioning.
RAID groups are areas for storing normal data that are used when the volume capacity requirements can be
estimated in advance. Business volumes and Advanced Copy volumes (Standard type volumes, WSVs, Snap
Data Volumes (SDVs), and Snap Data Pool Volumes (SDPVs)) can be created in RAID groups.
Thin Provisioning manages drives in a pool and assigns virtual logical volumes when data is written from the
host. Thin Provisioning enables operations to be started with less drive capacity even if the capacity require-
ments cannot be estimated. Thin Provisioning Volumes (TPVs) are created in Thin Provisioning Pools.
The Copybackless function is enabled by default.
To operate with a fixed drive layout, set Copybackless to "Disable" with the "Setup Subsystem Parameters"
function. Refer to "Setup Subsystem Parameters" in "ETERNUS Web GUI User’s Guide (Settings)" for details.
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