ETERNUS DX60/DX80/DX90 Disk storage system User Guide - Fujitsu

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Chapter 1 Overview 1.3 Functions 1.3.5 Logical Device Expansion Logical Device Expansion (RAID Group Expansion) allows the capacity of an existing RAID group to be dynamically extended by the addition of extra disks. By using Logical Device Expansion to extend the capacity of existing RAID group in this way, new volume can be added without having to add new RAID groups, as used to be the case. The following shows the example when RAID5(3+1) 300GB configuration converted to a RAID5(4+1) configuration by the addition of an extra disk. RAID5(3+1) 300GB 300GB 300GB 300GB LUN0 600GB LUN1 300GB RAID5(4+1) 300GB 300GB 300GB 300GB 300GB LUN0 600GB LUN1 300GB LUN2 300GB 300GB Figure 1.15 Example for use Logical Device Expansion Unused 44 ETERNUS DX60/DX80/DX90 Disk storage system User Guide Copyright 2011 FUJITSU LIMITED P3AM-3042-08ENZ0
Chapter 1 Overview 1.3 Functions 1.3.6 LUN Concatenation LUN concatenation is a function that is used to add new area to a volume and so expand the volume capacity available to the server. This function enables the reuse of leftover free area in a RAID group and can be used to solve capacity shortages. The following example shows the concatenation of an unused area of a different RAID group into LUN2, in order to expand LUN2's capacity to 900GB. RAID5(3+1) 300GB 300GB 300GB 300GB RAID5(3+1) LUN0 600GB LUN2 300GB 300GB 300GB 300GB 300GB LUN0 600GB LUN2 900GB RAID5(3+1) Figure 1.16 Example for use LUN Concatenation 300GB 300GB 300GB 300GB RAID5(3+1) LUN1 300GB Unused area 600GB 300GB 300GB 300GB 300GB LUN1 300GB 45 ETERNUS DX60/DX80/DX90 Disk storage system User Guide Copyright 2011 FUJITSU LIMITED P3AM-3042-08ENZ0
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Page 4 and 5: Preface The ETERNUS DX60/DX80/DX90
Page 6 and 7: Organization This manual is organiz
Page 8 and 9: About this Manual How Warnings are
Page 10 and 11: About this Manual ETERNUS Multipath
Page 12 and 13: Labels ■ Drive Enclosure ■ AC O
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Page 16 and 17: Table of Contents 7.4.4 Remote Supp
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Page 20 and 21: List of Figures Figure 7.37 [Setup
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Chapter 7 Setup 7.1 Setup Preparati
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Chapter 7 Setup 7.2 Basic Setup ❏
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Chapter 7 Setup 7.2 Basic Setup 1-3
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Chapter 7 Setup 7.2 Basic Setup ■
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Chapter 7 Setup 7.2 Basic Setup For
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Chapter 7 Setup 7.6 System Status C
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Chapter 9 Operation and Maintenance
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Appendix A Specifications A.1 Devic
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Appendix C About Using of Open Sour
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Appendix C About Using of Open Sour
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Index F G H I Expansion controller
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Index T U SCU STATUS LED Fibre Chan
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ETERNUS DX60/DX80/DX90 Disk storage system User Guide - Fujitsu

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