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Chapter 9: Drive Management
9.2.4 Dynamic Logical Drive Expansion
9.2.4.1. What Is It and How Does It Work?
Before Dynamic Logical Drive Expansion, increasing the capacity of a
RAID system using traditional methods meant backing up, re-creating,
and then restoring data. Dynamic Logical Drive Expansion allows you to
add new hard disk drives and expand a RAID level 0, 3, 5 or 6 logical
drive without powering down the system.
9.2.4.2. Two Modes of Dynamic LD Expansion
There are two modes of Dynamic Logical Drive Expansion.
Mode 1
Mode 1 Expansion is illustrated in Figure 9-9 and involves adding more
hard disk drives to a logical drive, which may require that the purchase of
an enclosure with more drive bays. The data will be re-striped onto the
original and newly added disks.
Figure 9-9: RAID Expansion Mode 1
In Figure 9-9 above, new drives are added to increase the capacity of a
4-Gigabyte (GB) RAID 5 logical drive. The two new drives increase the
capacity to 8GB.
Mode 2
Logical Drive Management 9-13
- Effortless RAID Management 1
- Contact Information 2
- Copyright 2006 3
- Table of Contents 4
- List of Tables 9
- Table of Figures 10
- User’s Manual Overview 14
- Part 3: System Monitoring 16
- Appendices 16
- Usage Conventions 17
- CAUTION! 17
- Revision History 19
- Chapter 1 23
- Introduction 23
- 1.1 RAIDWatch Overview 24
- 1.2 Featured Highlights 25
- 1.2.2 Enclosure View 26
- Chapter 1: Introduction 27
- 1.2.4.4 Access Requirements 28
- 1.2.5 Multi-Language Support 31
- 1.2.6 Password Protection 31
- 1.3 Conceptual Foundation 32
- Chapter 2 35
- RAIDWatch Considerations 35
- 2.1 Background Information 36
- 2.2 Definition of Terms 36
- 2.5 Before You Start 38
- Chapter 3 39
- 3.1 System Requirements 40
- 3.2 RAID Chart 41
- 3.3 Platform Requirements 42
- 3.4 Software Setup 43
- Browser 46
- IMPORTANT! 52
- 3.5 Program Updates 58
- 3.6 In-band SCSI 58
- Chapter 4 61
- Configuration Client Options 61
- ♦ Auto Discovery 63
- Figure 4-4: Add Host Command 64
- Figure 4-6: Connect Commands 64
- "root" as the 65
- 4.2.1 Command Menu 67
- 4.2.2 Tool Bar Buttons 67
- 4.3 Root Agent Configuration 69
- 4.3.1 Root Agent Settings 70
- Right-click on the 71
- Current Value 71
- 4.3.4.1 Before you begin 72
- 4.4.2 Event Severity Levels 74
- 4.4.4 SNMP Traps Settings 76
- Receiver Side 76
- Sender Side 77
- 4.4.5 Email Settings 77
- 4.4.7 Fax Settings 81
- 4.4.8 MSN Settings 83
- 4.4.9 SMS Settings 84
- 4.5 Auto Discovery 86
- 4.6 Event Severity Levels 89
- 4.7 Event Log Display 90
- Chapter 5 93
- RAIDWatch Icons 93
- Enclosure View 95
- Tasks Under Process 96
- Logical Drive Information 96
- Logical Volume Information 96
- Fibre Channel Status 97
- System Information 97
- Maintenance 97
- Create Logical Drives 98
- Existing Logical Drives 98
- Create Logical Volume 98
- Existing Logical Volumes 98
- Host Channel 98
- Host LUN Mapping 99
- Event Messages 99
- This page is intentionally 100
- Chapter 6 101
- Basic Operations 101
- IMPORTANT! 103
- 2003 Environments 104
- NOTE: 105
- Connection 109
- 6.5 Look and Feel 111
- 6.5.2 Screen Elements 112
- 6.5.3 Command Menus 112
- 6.5.4 Outer Shell Commands 113
- 6.6.1 Enclosure View Window 115
- 6.6.7 Statistics Window 118
- 6.7 The Maintenance Category 119
- 6.8.1 Quick Installation 124
- 6.8.6 Channel Window 126
- Figure 6-30: Channel Window 127
- 6.9 Arranging Windows 128
- 6.10 Multi-array Management 130
- Chapter 7 131
- Configuration Parameters 131
- 7.2 Communications 133
- 7.3 Controller 134
- Controller Parameters 135
- 7.4 System 136
- WARNING! 137
- Download/Upload 137
- 7.5 Password 138
- 7.6 Threshold 139
- Disk-Array Parameters 150
- Chapter 8 153
- Channel Configuration 153
- 8.2.1. Channel Mode 156
- 8.2.2. Termination 157
- 8.2.4. ID Pool / AID / BID 158
- Figure 8-5: ID Pool Menu 159
- Chapter 9 161
- Drive Management 161
- 9.1. Locating Drives 163
- 9.2.2.1. LD Creation 165
- 9.2.2.2. Selecting Drives 165
- Figure 9-4: List of LDs 168
- Available Expand Size (MB) 170
- Set Expansion Size 170
- Execute Expand 170
- Choose a RAID Level 171
- RAID Expansion - Mode 2 174
- RAID Expansion - Mode 2 (3/3) 175
- 9.2.7 Deleting an LD 177
- 9.3.2.1. LV Creation 180
- 9.3.2.2. Selecting LDs 180
- LV Assignment 180
- Select Write Policy 181
- 9.3.4 Deleting an LV 184
- 9.4.1 Overview 185
- 9.5.1 Read/Write Test 189
- Chapter 10 191
- LUN Mapping 191
- 10.2. LUN Mapping 193
- Host LUN 194
- Initiator Settings 195
- Chapter 11 199
- 11.1 RAID Information 200
- 11.1.2 Date and Time 201
- 11.1.3 Enclosure View 202
- 11.1.4 Task Under Process 203
- Event Log List Window 204
- Configuration List Window 205
- 11.4 Fibre Channel Status 209
- 11.5 System Information 209
- Table 11-3: Device Icon 210
- 11.6 Statistics 211
- Chapter 12 213
- Enclosure Display 213
- Tabbed Panel 214
- 12.2.3 Component Information 215
- LED panel) 216
- 12.5 Information Summary 218
- Chapter 13 219
- Installation 219
- 13.1.1 Introduction 220
- 13.2.1 SSL 221
- 13.2.2 Email Notification 221
- 13.2.3 SNMP Traps 223
- Chapter 14 227
- Figure 14-1: Add Host 228
- 14.4.1 Icon Labels 230
- 14.4.2 System Events 231
- A.1. Menu Commands 234
- Tool Bar Commands 237
- Appendix B. Glossary 239
- C.1. RAID Description 245
- C.2. Non-RAID Storage 245
- C.3. RAID 0 246
- C.4. RAID 1 247
- C.5. RAID 1(0+1) 247
- C.6. RAID 3 248
- C.7. RAID 5 249
- C.8. RAID 6 250
- D.3. Uninstalling RAIDWatch 251
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