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RAIDWatch User’s Manual
IMPORTANT!
RAID (0+1) will not appear in the list of RAID levels supported by the
controller. If you wish to perform RAID 1, the controller will determine
whether to perform RAID 1 or RAID (0+1). This will depend on the
drive number that has been selected for the logical drive.
Figure C-4: RAID 1(0+1) Storage
C.6. RAID 3
RAID 3 implements block striping with dedicated parity. This RAID level
breaks data into logical blocks, the size of a disk block, and then stripes
these blocks across several drives. One drive is dedicated to parity. In the
event a disk fails, the original data can be reconstructed from the parity
information.
In RAID 3, the total disk capacity is equivalent to the sum of the capacities
of all drives in the combination, excluding the parity drive. For example,
combining four 1GB drives would create a single logical drive with a total
disk capacity of 3GB. This combination appears to the system as a single
logical drive.
RAID 3 provides increased data transfer rates when data is being accessed
in large chunks or sequentially.
However, in write operations that do not span multiple drives, performance
is reduced since the information stored in the parity drive needs to be
recalculated and rewritten every time new data is written to any of the data
disks.
App-16 RAID Levels
- 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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