Dell PowerVault MD3600f Manuel d'utilisateur Page 257
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Management: Firmware Downloads 257
Media Errors and Unreadable Sectors
If the RAID controller detects a media error while accessing data from a
physical disk that is a member of a disk group with a redundant RAID level
(RAID 1, RAID 5 or RAID 10), the controller tries to recover the data from
peer disks in the disk group and uses recovered data to correct the error. If the
controller encounters an error while accessing a peer disk, it is unable to
recover the data and affected sectors are added to the unreadable sector log
maintained by the controller. Other conditions under which sectors are added
to the unreadable sector log include:
• A media error is encountered when trying to access a physical disk that is a
member of a nonredundant disk group (RAID 0 or degraded RAID 1,
RAID 5 or RAID 10).
• An error is encountered on source disks during rebuild.
NOTE: Data on an unreadable sector is no longer accessible.
book.book Page 257 Wednesday, June 8, 2011 5:01 PM
- Owner’s Manual 1
- Notes, Cautions, and Warnings 2
- Contents 3
- 4 Contents 4
- 6 Configuration: About 6
- 9 Configuration: Disk Groups 8
- 10 Contents 10
- 12 Contents 12
- 15 Management: Installing 14
- 16 Contents 16
- 18 Contents 18
- Introduction 19
- Series Storage Array 20
- 22 Introduction 22
- Overview 23
- Hardware Features 24
- Hard–Drive Indicator Patterns 28
- Power Indicator Codes 30
- RAID Controller Modules 31
- Battery Backup Unit 34
- Cache Functions and Features 35
- Write–Back Cache 36
- Write–Through Cache 36
- Array Terms and Concepts 39
- Physical Disks 40
- Physical Disk States 40
- Virtual Disks and Disk Groups 41
- Virtual Disk States 42
- RAID Levels 43
- Segment Size 45
- Virtual Disk Operations 45
- Background Initialization 46
- Foreground Initialization 46
- Consistency Check 46
- Media Verification 46
- Cycle Time 47
- Virtual Disk Operations Limit 47
- Disk Group Operations 48
- Disk Group Defragmentation 49
- Disk Group Operations Limit 49
- Disk Migration 51
- Advanced Features 53
- Host Types 54
- Virtual Disk Recovery 56
- Multi–Path Software 57
- Load Balancing 58
- Configuration: Overview 63
- Enterprise Management Window 64
- Array Management Window 65
- Out-of-Band Management 67
- Storage Arrays 68
- Setting Up Your Storage Array 70
- Locating Storage Arrays 71
- Setting a Password 73
- Password Guidelines 74
- Removing Storage Arrays 75
- Enabling Premium Features 76
- Failover Alert Display 76
- Configuring E–mail Alerts 79
- Configuring SNMP Alerts 81
- Battery Settings 83
- Configuration: Event Monitor 85
- Configuring Host Access 87
- Using the Mappings Tab 88
- Removing Host Access 90
- Managing Host Groups 90
- Creating a Host Group 91
- Removing a Host Group 92
- Host Topology 93
- I/O Data Path Protection 94
- Virtual Disks 99
- Creating Disk Groups 100
- Locating a Disk Group 102
- Creating Virtual Disks 102
- Changing the I/O Type 108
- 512 KB) 109
- Creating a Security Key 112
- Changing a Security Key 114
- Saving a Security Key 115
- Erasing Secure Physical Disks 117
- Hot Spares and Rebuild 120
- Global Hot Spares 120
- Hot Spare Operation 120
- Enclosure Loss Protection 121
- (continued) 123
- Host-to-Virtual Disk Mapping 124
- Restricted Mappings 130
- Disk Group 131
- Storage Partitioning 134
- Disk Group Expansion 135
- Virtual Disk Expansion 136
- Using Free Capacity 136
- Disk Group Migration 137
- Import Disk Group 138
- Storage Array Media Scan 139
- Changing Media Scan Settings 140
- Suspending the Media Scan 141
- Snapshot Virtual Disks 143
- Simple Path 144
- About the Simple Path 145
- Server Failover Clusters 146
- Advanced Path 148
- Snapshot Repository Capacity 154
- Capacity option is disabled 155
- PowerVault Modular Disk 157
- Storage Manager online help 157
- Virtual Disk Copy 161
- Creating a Virtual Disk Copy 165
- Create Copy Wizard 166
- Failed Virtual Disk Copy 166
- Failed RAID Controller Module 167
- Copy Manager 167
- Copying the Virtual Disk 168
- Setting Copy Priority 169
- Stopping a Virtual Disk Copy 170
- Recopying a Virtual Disk 170
- Recopying the Virtual Disk 172
- Removing Copy Pairs 173
- Remote Replication 177
- Switch Cascading 182
- Prerequisites 183
- Replication Virtual Disks 184
- Storage Array 184
- Existing Disk Group 185
- Creating a Remote Replication 186
- Setting the Write Mode 187
- Repository Virtual Disk 190
- Viewing the Properties Pane 192
- Virtual Disk 193
- Virtual Disk Status Icons 194
- Unsynchronized Virtual Disks 199
- Resuming a Remote Replication 203
- Configuration: Device Mapper 211
- Multipath for Linux 211
- Using DM Multipathing Devices 212
- Ready for Use 216
- Limitations and Known Issues 218
- Troubleshooting 219
- Management: Installing Array 221
- Components 221
- Front Bezel (Optional) 222
- Hard Drives 223
- Installing a Drive Blank 224
- Removing a Hard Drive 224
- Installing a Hard Drive 226
- RAID Controller Module 229
- Control Panel 239
- 1 control panel 2 release tab 240
- Installing the Control Panel 241
- Backplane 242
- Installing the Backplane 245
- Packages 247
- Firmware 248
- EMM Firmware 255
- Technology (SMART) 256
- Management: System Interfaces 261
- Array Software 263
- Storage Array Support Data 266
- Event Log 269
- Recovery Guru 270
- Storage Array Profile 270
- Finding Nodes 273
- Using Go To 275
- Condition 276
- Locating a Physical Disk 279
- SMrepassist Utility 281
- Unidentified Devices 282
- Software 285
- Troubleshooting: Your Array 289
- Management Modules 294
- Troubleshooting Hard Drives 296
- Connections 297
- Conditions 300
- PCI Errors 301
- Critical Conditions 301
- Noncritical Conditions 301
- Getting Help 303
- 304 Getting Help 304
- Index 305 305
- Index 306 306
- Index 307 307
- Index 308 308
- Index 309 309
- Index 310 310
- Index 311 311
- 312 Index 312
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