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Configuration: Premium Feature—Virtual Disk Copy 163
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Configuration: Premium Feature—
Virtual Disk Copy
NOTE: A virtual disk copy overwrites data on the target virtual disk. Before starting
a virtual disk copy, ensure that you no longer need the data or back up the data on
the target virtual disk.
NOTE: If you ordered this feature, you received a Premium Feature Activation card
that shipped in the same box as your Dell PowerVault MD storage array. Follow the
directions on the card to obtain a key file and to enable the feature.
NOTE: The preferred method for creating a virtual disk copy is to copy from a
snapshot virtual disk. This allows the original virtual disk used in the snapshot
operation to remain fully available for read/write activity while the snapshot is used
as the source for the virtual disk copy operation.
When you create a virtual disk copy, you create a copy pair that has a source
virtual disk and a target virtual disk on the same storage array.
The source virtual disk is the virtual disk that contains the data you want to
copy. The source virtual disk accepts the host I/O read activity and stores the
data until it is copied to the target virtual disk. The source virtual disk can be
a standard virtual disk, a snapshot virtual disk, or the source virtual disk of a
snapshot virtual disk. When you start a virtual disk copy, all data is copied to
the target virtual disk, and the source virtual disk permissions are set to read-
only until the virtual disk copy is complete.
The target virtual disk is a virtual disk to which you copy data from the source
virtual disk. The target virtual disk can be a standard virtual disk, or the
source virtual disk of a failed or disabled snapshot virtual disk.
After the virtual disk copy is complete, the source virtual disk becomes
available to host applications for write requests. To prevent error messages, do
not attempt to access a source virtual disk that is participating in a virtual disk
copy while the virtual disk copy is in progress.
Reasons to use virtual disk copy include:
book.book Page 163 Wednesday, May 26, 2010 2:14 PM
- Owner’s Manual 1
- Notes, Cautions, and Warnings 2
- Contents 3
- 4 Contents 4
- 6 Configuration: About Your 6
- 8 Contents 8
- 10 Contents 10
- 12 Contents 12
- 16 Management: Installing 13
- 14 Contents 14
- 16 Contents 16
- Contents 17 17
- 18 Contents 18
- Introduction 19
- Dell PowerVault MD3200i 20
- Series Storage Array 20
- Introduction 21 21
- 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-Through Cache 36
- Array Terms and Concepts 37
- Physical Disk States 38
- Virtual Disks and Disk Groups 39
- RAID Levels 40
- RAID Level Usage 41
- Segment Size 42
- Virtual Disk Operations 43
- Media Verification 44
- Cycle Time 44
- Virtual Disk Operations Limit 44
- Disk Group Operations 45
- Disk Group Defragmentation 46
- Disk Group Operations Limit 46
- Disk Migration 48
- Advanced Features 50
- Host Types 51
- Virtual Disk Recovery 53
- Multi-Path Software 54
- Load Balancing 55
- Configuration: Overview 59
- Enterprise Management Window 60
- Array Management Window 61
- Out-of-Band Management 63
- Storage Arrays 64
- Setting Up Your Storage Array 66
- Locating Storage Arrays 67
- Setting a Password 69
- Password Guidelines 70
- Removing Storage Arrays 71
- Enabling Premium Features 72
- Failover Alert Display 72
- Configuring E-mail Alerts 74
- Configuring SNMP Alerts 77
- Battery Settings 78
- Configuration: Using iSCSI 81
- Creating CHAP Secrets 82
- Initiator CHAP Secret 83
- Target CHAP Secret 83
- Statistics 89
- 90 Configuration: Using iSCSI 90
- Configuration: Event Monitor 91
- Configuring Host Access 93
- Using the Mappings Tab 94
- Removing Host Access 96
- Managing Host Groups 96
- Adding a Host to a Host Group 97
- Removing a Host Group 98
- Host Topology 98
- I/O Data Path Protection 100
- Virtual Disks 103
- Creating Disk Groups 104
- Locating a Disk Group 106
- Creating Virtual Disks 106
- Changing the I/O Type 112
- Creating a Security Key 116
- Changing a Security Key 117
- Saving a Security Key 119
- Erasing Secure Physical Disks 120
- Hot Spares and Rebuild 123
- Global Hot Spares 123
- Hot Spare Operation 123
- Hot Spare Drive Protection 123
- Enclosure Loss Protection 124
- Host-to-Virtual Disk Mapping 126
- Restricted Mappings 132
- Disk Group 133
- Storage Partitioning 136
- Disk Group Expansion 137
- Virtual Disk Expansion 138
- Using Free Capacity 138
- Using Unconfigured Capacity 138
- Disk Group Migration 139
- Import Disk Group 140
- Storage Array Media Scan 141
- Changing Media Scan Settings 142
- Suspending the Media Scan 143
- Snapshot Virtual Disks 145
- Simple Path 146
- Advanced Path 149
- Snapshot Repository Capacity 156
- Virtual Disk Copy 163
- Creating a Virtual Disk Copy 166
- Before you Begin 167
- Create Copy Wizard 167
- Failed RAID Controller Module 168
- Copy Manager 169
- Copying the Virtual Disk 169
- Setting Copy Priority 170
- Stopping a Virtual Disk Copy 171
- Recopying a Virtual Disk 172
- Recopying the Virtual Disk 173
- Removing Copy Pairs 174
- Configuration: Device Mapper 177
- Multipath for Linux 177
- Using DM Multipathing Devices 178
- Ready For Use 182
- Limitations and Known Issues 184
- Troubleshooting 185
- Packages 187
- Firmware 188
- EMM Firmware 194
- Technology (SMART) 196
- Management: Installing Array 197
- Components 197
- Front Bezel (Optional) 198
- Hard Drives 199
- Installing a Drive Blank 200
- Removing a Hard Drive 200
- Installing a Hard Drive 202
- RAID Controller Module 205
- Control Panel 215
- Installing the Control Panel 216
- Backplane 217
- Installing the Backplane 220
- Management: System Interfaces 223
- Array Software 225
- Storage Array Support Data 229
- Event Log 231
- Recovery Guru 232
- Storage Array Profile 232
- Finding Nodes 235
- Using Go To 236
- Condition 237
- Locating a Physical Disk 240
- SMrepassist Utility 243
- Unidentified Devices 244
- Software 246
- Troubleshooting: Your Array 249
- Management Modules 251
- Troubleshooting Hard Drives 254
- Connections 255
- Conditions 257
- Invalid Storage Array 257
- ECC Errors 257
- PCI Errors 258
- Critical Conditions 258
- Noncritical Conditions 258
- Getting Help 259
- 260 Getting Help 260
- Index 261 261
- Index 262 262
- Index 263 263
- Index 264 264
- Index 265 265
- Index 266 266
- Index 267 267
- 268 Index 268
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