AMCC 3WARE 9500S Guia do Utilizador Página 17
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Understanding RAID Concepts and Levels
www.3ware.com 7
RAID 5 is able to tolerate 1 drive failure in the unit.
Figure 4. RAID 5 Configuration Example
RAID 6
RAID 6 requires a 3ware 9650SE RAID controller.
RAID 6 provides greater redundancy and fault tolerance than RAID 5. It is
similar to RAID 5, but has two blocks of parity information (P+Q) distributed
across all the drives of a unit, instead of the single block of RAID 5.
Due to the two parities, a RAID 6 unit can tolerate two hard drives failing
simultaneously. This also means that a RAID 6 unit may be in two different
states at the same time. For example, one sub-unit can be degraded, while
another may be rebuilding, or one sub-unit may be initializing, while another
is verifying.
RAID 6 requires a minimum of five drives. Performance and storage
efficiency also increase as the number of drives increase.
- User Guide 1
- Copyright 2
- Trademarks 2
- Disclaimer 2
- Table of Contents 3
- About this User Guide 7
- Conventions 9
- Screenshots 9
- Click the Show Navigation 10
- Contents 10
- Introducing the 3ware 11
- RAID Controller 11
- System Requirements 12
- Drive Requirements 13
- Operating System 13
- Other Requirements 13
- RAID Concepts 14
- Available RAID Configurations 15
- Single Disk 20
- Hot Spare 20
- Management 23
- Monitoring, Maintenance, and 24
- Troubleshooting Features 24
- Getting Started with Your 26
- 3ware RAID Controller 26
- Using 3BM 30
- Figure 8. 3ware BIOS Screen 31
- Specifying a Hot Spare 38
- What Next? 39
- Driver Installation 40
- Materials Required 41
- Different Device 43
- Available to Windows 48
- Obtaining 3ware Linux Drivers 50
- Fedora Core 5 51
- Instructions 54
- 3w-9xxx.big 55
- 3w-9xxx.hug 55
- 3w-9xxx.i32 55
- Materials required 57
- Device” on page 48 58
- /sys/modules/twa 66
- 3ware BIOS Manager 2 (3BM 2) 67
- Introduction 67
- Working in the 3BM Screens 70
- Table 7: Working in 3BM 2 72
- BIOS Loading Options 73
- Getting Help While Using 3BM 75
- 3DM 2 (3ware Disk Manager) 76
- Browser Requirements for 3DM 77
- Installing 3DM 78
- Starting 3DM and Logging In 78
- Start/Play icon 80
- Working with the 3DM Screens 81
- 3DM Menus 82
- Refreshing the Screen 84
- Table 8: List of 3DM Pages 85
- Setting Up 3DM Preferences 86
- Setting the Incoming Port # 89
- Configuring Your Controller 90
- About Controller Policies 92
- Viewing Controller Policies 93
- • Choose 94
- from the menu bar 94
- Auto-Carving 98
- Exporting JBOD Disks 100
- Configuring Units 101
- Chapter 8. Configuring Units 102
- Name of the unit (optional) 103
- Unit policies 103
- Creating a Unit through 3DM 104
- Creating a Unit through 3BM 107
- Ordering Units in 3BM 110
- Creating a Hot Spare 113
- Naming a Unit 115
- Setting Unit Policies 116
- About StorSave Profile Levels 122
- Migrating 125
- Changing RAID Level 127
- Expanding Unit Capacity 128
- Configuration 129
- Deleting a Unit 130
- Deleting a Unit through 3DM 131
- Deleting a Unit through 3BM 132
- Removing a Unit 133
- Removing a Unit Through 3DM 134
- Removing a Unit Through 3BM 135
- Controller 136
- 9650SE Controller 138
- Adding a Drive 139
- Removing a Drive 140
- Rescanning the Controller 141
- Management > Maintenance 142
- Rescan Controller 142
- Maintenance page 142
- Maintaining Units 143
- Chapter 9. Maintaining Units 144
- Unit Statuses 145
- Drive Statuses 147
- About Inoperable Units 148
- Downloading an Error Log 151
- Background Tasks 152
- About Initialization 153
- About Verification 156
- What Verification Does 157
- Starting a Verify Manually 158
- Rebuilding Units 160
- Rebuilding a Unit Through 3DM 161
- Rebuilding Units through 3BM 162
- Different Drive 164
- Setting Background Task Rate 165
- Scheduling Background Tasks 166
- Scheduled Task Duration 167
- Removing a Task Schedule 169
- Identify box 172
- Identify column 172
- Maintaining Your Controller 173
- Begin Update 176
- Under Windows 177
- Have Disk… button 184
- Fedora Core 188
- Viewing Battery Information 193
- Testing Battery Capacity 193
- 3DM 2 Reference 196
- Controller Summary page 197
- Controller Details page 198
- Unit Information page 199
- Unit Details page 200
- Drive Information page 202
- Drive Details window 203
- SMART Data 204
- Controller Settings page 205
- Unit Policies 206
- Unit Names 207
- Other Controller Settings 207
- Update Firmware 208
- Scheduling page 209
- Task Schedules 210
- Self-test Schedules 210
- Unit Maintenance 213
- Unit Information 214
- Maintenance Task Buttons 215
- Create Unit 218
- Alarms page 220
- Battery Backup page 221
- Enclosure Summary page 223
- Enclosure Details page 224
- 3DM 2 Settings page 225
- E-mail Notification 226
- Password 226
- Page Refresh 227
- Remote Access 227
- HTTP Settings 227
- Troubleshooting 228
- http:// 229
- Command Logging 230
- Problems and Solutions 230
- Enclosure-Related Problems 231
- Chapter 12. Troubleshooting 232
- Problems in 3DM and 3BM 233
- 0002 Degraded unit 238
- 0004 Rebuild failed 239
- 0005 Rebuild completed 239
- 0006 Incomplete unit detected 240
- 0007 Initialize completed 240
- 0009 Drive timeout detected 241
- 000A Drive error detected 242
- 000B Rebuild started 242
- 000C Initialize started 243
- 000E Initialize failed 243
- 000F SMART threshold exceeded 244
- 0019 Drive removed 245
- 001A Drive inserted 245
- 001E Unit inoperable 245
- 001F Unit Operational 246
- 0021 Downgrade UDMA mode 246
- 0022 Upgrade UDMA mode 247
- 0023 Sector repair completed 247
- 0026 Drive ECC error reported 249
- 0028 DCB version unsupported 250
- 0029 Verify started 251
- 002A Verify failed 251
- 002B Verify completed 252
- . If you have more than one 253
- 0030 Drive not supported 255
- 0032 Spare capacity too small 255
- 0033 Migration started 256
- 0034 Migration failed 256
- 0035 Migration completed 257
- 0037 SO-DIMM not compatible 257
- 0038 SO-DIMM not detected 258
- 003B Rebuild paused 259
- 003C Initialize paused 260
- 003D Verify paused 260
- 003E Migration paused 261
- 0045 Battery voltage is low 263
- 0046 Battery voltage is high 264
- 0055 Battery charging started 269
- 0057 Battery charging fault 270
- 005A Battery is present 271
- 005B Battery is not present 271
- 005C Battery is weak 272
- Appendices 274
- Glossary 275
- Software Installation 281
- Uninstalling Software 289
- Compliance and Conformity 290
- Statements 290
- Warranty, Technical Support 292
- Exclusions 293
- State Law Provisions 293
- Feedback on this manual 294
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