Dell OpenManage Server Administrator Version 7.2 Manuel d'utilisateur Page 75
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- Table des matières
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Controllers 75
•
Read Cache Enabled
—When the read cache is enabled, the controller
reads the cache information to see if the requested data is available in the
cache before retrieving the data from the disk. Reading the cache
information first can provide faster read performance because the data (if
available in the cache) can more quickly be retrieved from the cache than
from the disk.
•
Read Cache Disabled
—When the read cache is disabled, the controller
retrieves data directly from the disk and not from the cache.
- User’s Guide 1
- Notes, Cautions, and Warnings 2
- Contents 3
- 4 Contents 4
- 6 Storage Information and 6
- 8 Contents 8
- 10 Contents 10
- 12 Contents 12
- 14 Contents 14
- 16 Contents 16
- 18 Contents 18
- 20 Contents 20
- Overview 21
- Supported Controllers 23
- Supported Enclosures 24
- Getting Started 25
- Launching Storage Management 26
- User Privileges 26
- Storage Object 27
- Health Subtab 27
- Interface 28
- Displaying the Online Help 28
- Common Storage Tasks 28
- Getting Started 29 29
- 30 Getting Started 30
- Understanding RAID Concepts 31
- RAID Concepts 32
- Performance 33
- Concatenation 35
- RAID Level 0 (Striping) 36
- RAID 0 Characteristics: 37
- RAID Level 1 (Mirroring) 38
- RAID 5 Characteristics: 39
- RAID 6 Characteristics: 41
- RAID 50 Characteristics: 43
- RAID 60 Characteristics: 45
- RAID 10 Characteristics: 47
- Storage Health 53
- Hot Spare Protection Policy 54
- Select Report 54
- Storage Component Severity 54
- Alerts or Events 56
- What is PCIe SSD 59
- PCIe SSD Features 59
- PCIe Sub System Properties 60
- PCIe Extender Cards 61
- Physical Device Properties 61
- Physical Device Tasks 62
- Blink and Unblink 63
- PCIe SSD Sub System Health 64
- Storage Properties 65
- Global Tasks 65
- Global Rescan 66
- Storage Controllers 67
- RAID Controller Features 72
- Controllers 73 73
- Cache Policy 74
- Controllers 75 75
- Write Policy 76
- Disk Cache Policy 78
- Firmware/Driver Versions 79
- Firmware/Driver Properties 80
- Controller Health 82
- Controller Information 83
- Controller Components 83
- Controller Properties 84
- 86 Controllers 86
- 88 Controllers 88
- To rescan a controller: 91
- Create Virtual Disk 91
- Enable Alarm (Controller) 91
- Disable Alarm (Controller) 91
- Set Rebuild Rate 94
- Reset Configuration 95
- Export Log 96
- 98 Controllers 98
- Disks and Global Hot Spares 98
- Controllers 101 101
- Controllers 102
- Clear Foreign Configuration 103
- 106 Controllers 106
- 108 Controllers 108
- Set Check Consistency Rate 110
- Set Reconstruct Rate 111
- Redundant Path Configuration 112
- Set Patrol Read Mode 115
- To set the Patrol Read mode: 116
- Start and Stop Patrol Read 117
- Change Controller Properties 118
- Manage Physical Disk Power 119
- Manage Preserved Cache 123
- Manage Encryption Key 124
- Encryption Key 125
- Manage CacheCade 127
- Resizing the CacheCade 128
- Renaming the CacheCade 128
- Deleting the CacheCade 129
- CacheCade Properties 129
- Convert to Non-RAID Disks 130
- Convert to RAID Capable Disks 130
- Patrol Read Report 131
- Check Consistency Report 131
- Slot Occupancy Report 131
- 134 Controllers 134
- Enclosures and Backplanes 135
- Enclosure Physical Disks 136
- Enclosure Fans 136
- Enclosure Power Supplies 136
- Enclosure Temperature Probes 136
- Enclosures and Backplanes 137 137
- SMART Thermal Shutdown 138
- Enclosure Management 139
- Enclosures and Backplanes 141 141
- 142 Enclosures and Backplanes 142
- Enclosure Tasks 144
- Available Reports 145
- Disable Alarm (Enclosure) 146
- Set Asset Data 146
- Set Temperature Probe Value 146
- View Slot Occupancy Report 146
- Enclosures and Backplanes 147 147
- Set Temperature Probe Values 149
- EMM Properties 151
- 152 Enclosures and Backplanes 152
- Fan Properties 153
- 154 Enclosures and Backplanes 154
- Power Supply Properties 155
- 156 Enclosures and Backplanes 156
- 158 Enclosures and Backplanes 158
- Enclosures and Backplanes 159 159
- 160 Enclosures and Backplanes 160
- Connectors 161
- Connector Health 163
- Connector Information 164
- Connector Components 164
- Connector Properties 164
- Logical Connector Properties 166
- Path Health 167
- Related Tasks 168
- Logical Connector Components 168
- Tape Drives 169
- 170 Tape Drives 170
- RAID Controller Batteries 171
- 172 RAID Controller Batteries 172
- Battery Tasks 173
- Battery Delay Learn Cycle 174
- Related Information: 175
- 176 RAID Controller Batteries 176
- Add a New Disk to Your System 178
- Other Disk Procedures 180
- Remove Dead Segments 189
- Prepare to Remove 189
- Rebuild 190
- Cancel Rebuild 190
- Online and Offline 192
- Revertible Hot Spare 193
- Instant Encrypt Erase 194
- Full Initialization 195
- Convert to RAID Capable Disk 196
- Convert to Non-RAID Disk 196
- Virtual Disks 197
- Virtual Disks 199 199
- Virtual Disks 201 201
- Express Wizard 202
- Creating Virtual Disks 203
- (continued) 205
- 206 Virtual Disks 206
- Recommendations 210
- Virtual Disk Properties 210
- 212 Virtual Disks 212
- Virtual Disk Tasks 214
- Reconfigure 215
- Restore Dead Segments 215
- Check Consistency 216
- Cancel Check Consistency 216
- Pause Check Consistency 216
- Resume Check Consistency 217
- Change Policy 218
- Replace Member Disk 218
- Clear Virtual Disk Bad Blocks 218
- Encrypt Virtual Disk 218
- Virtual Disks 219 219
- Virtual Disks 223 223
- Connector 0 226
- Physical Disks Selected 226
- Span Edit 230
- Virtual Disks 233 233
- Slow and Fast Initialize 234
- Virtual Disks 235 235
- Virtual Disk Task: Delete 236
- Virtual Disk Task: Rename 237
- To rename a virtual disk: 238
- Split Mirror 239
- Unmirror 239
- To Unmirror: 240
- Virtual Disks 243 243
- 244 Virtual Disks 244
- Required Conditions 245
- Hot Spare 247
- CacheCade Using Solid State 255
- Troubleshooting 257
- System Requirements 258
- Drivers and Firmware 258
- Isolate Hardware Problems 258
- Replacing a Failed Disk 259
- Virtual Disk Troubleshooting 261
- A Rebuild Does Not Work 262
- Cannot Create a Virtual Disk 263
- Management 264
- Virtual Disk Errors on Linux 264
- Troubleshooting 265 265
- “Medium” Error 266
- Degraded 267
- Format, or Other Operation 267
- Troubleshooting 269 269
- PCIe SSD Troubleshooting 270
- Troubleshooting 271 271
- 272 Troubleshooting 272
- Frequently Asked Questions 273
- Physical Disk? 274
- Which Controllers do I Have? 274
- How do I Turn off an Alarm? 275
- Supported Features 277
- 278 Supported Features 278
- Connector Tasks 280
- Physical Disk Tasks 281
- Virtual Disk Specifications 283
- 284 Supported Features 284
- Supported RAID Levels 286
- Controller Tasks 288
- 290 Supported Features 290
- 294 Supported Features 294
- 296 Supported Features 296
- 298 Supported Features 298
- 300 Supported Features 300
- Enclosure Support 301
- 308 Supported Features 308
- 312 Supported Features 312
- Enclosure and Backplane Tasks 319
- 320 Supported Features 320
- Storage Components 321
- Disk are Failed or Removed 322
- Version 326
- Probe is Failed 328
- Connections to the Enclosure 328
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