Dell PowerVault MD3420 Bedienungsanleitung Seite 58
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used with the create snapGroup command allows you to choose to either fail the write attempt or
automatically purge a specified number of older snapshot images.
create snapGroup
userLabel="snapGroupName"
sourceVolume="virtualDiskName"
repositoryVirtualDisk="repos_XXXX"
[repositoryFullPolicy=(failBaseWrites | purgeSnapImages) |
rollbackPriority=(high | highest | medium | low | lowest)|
repositoryFullLimit=
percentValue |
autoDeleteLimit=numberOfSnapImages]
• If you attempt to create a snapshot image and either of the two conditions below are present, the
creation might fail:
– The base virtual disk that contains this snapshot image is a member of a Remote Replication
group.
– The base virtual disk is currently synchronizing. When synchronization is complete, the snapshot
image creation will complete.
Creating A Snapshot Image
Before creating a snapshot image, you must have at least one snapshot group into which you can add the
snapshot image.
Create a snapshot image using the following command:
create snapImage (snapGroup="snapGroupName" | snapGroups=("snapGroupName1"...
"snapGroupName2 ..."))
where, snapGroupName or snapGroupNames is the name of the snapshot group (or groups) that you
specify to hold the snapshot image.
NOTE: Ensure that you have either existing repositories, enough free capacity nodes, or available
unconfigured capacity for the storage array on which you are creating the snapshot group
repository.
Deleting A Snapshot Image
Use the delete snapshot image command to delete the oldest snapshot image from a snapshot
group or consistency group.
After a snapshot image is deleted from a snapshot group:
• The snapshot image is deleted from the storage array.
• The repository’s reserve space is released for reuse within the snapshot group.
• All snapshot virtual disks associated with deleted snapshot image are disabled.
Use the following command to delete a snapshot image from a consistency group:
delete snapImage (snapGroup="snapGroupName" | snapGroups=("snapGroupName1"...
"snapGroupNamen")) (deleteCount=numberOfSnapImages |
retainCount=
numberOfSnapImages | ignoreSnapVirtualDisk=(TRUE | FALSE) |
snapImageID=OLDEST)
Creating A Consistency Group Snapshot Virtual Disk
Creating a snapshot virtual disk of a consistency group creates a viewable virtual disk of specific images in
the consistency group. A consistency group snapshot virtual disk can be made up of a single base virtual
disk or multiple base virtual disks from the consistency group.
This command also allows you to set the following attributes for the snapshot virtual disk:
58
- Storage Arrays 1
- CLI Guide 1
- Notes, Cautions, and Warnings 2
- Contents 3
- CLI Command Updates 17
- Usage Notes 20
- CLI Commands 20
- Command Line Parameters 22
- Formatting Considerations 26
- Detailed Error Reporting 26
- Exit Status 27
- Usage Examples 28
- About The Script Commands 31
- Script Command Structure 32
- Script Command Synopsis 33
- Recurring Syntax Elements 34
- Usage Guidelines 39
- Configuring A Storage Array 41
- Modifying Your Configuration 48
- Setting Modification Priority 50
- Assigning Global Hot Spares 51
- Using The Snapshot Feature 55
- Snapshot Groups 56
- Snapshot Consistency Groups 56
- Creating Snapshot Images 57
- Creating A Snapshot Image 58
- Deleting A Snapshot Image 58
- Scheduling Snapshot Images 60
- Creating A Snapshot Group 62
- Deleting A Snapshot Group 62
- Reviving A Snapshot Group 62
- Creating A Consistency Group 63
- Deleting A Consistency Group 63
- User-Defined Parameters 75
- About Virtual Disk Copy 81
- Virtual Disk Copy Types 81
- Creating A Virtual Disk Copy 82
- Copying The Virtual Disk 84
- Recopying A Virtual Disk 87
- Stopping A Virtual Disk Copy 88
- Removing Copy Pairs 88
- Disk Copy 89
- How Remote Replication Works 91
- Replication (Legacy) Features 92
- Setting Up Remote Replication 95
- A Remote Replication Group 98
- Premium Feature 101
- Replication Relationships 102
- Data Replication 102
- Synchronous Write Mode 103
- Asynchronous Write Mode 103
- Write Consistency Mode 103
- Resynchronization 104
- Performance Considerations 105
- Physical Disks 107
- Snapshot Virtual Disks 112
- Virtual Disk Copy 112
- Storage Partitioning 112
- Virtual Disk Expansion 113
- Maintaining A Storage Array 115
- Resetting Battery Age 117
- Performance Tuning 118
- Changing RAID Levels 119
- Changing Segment Size 119
- Using SSD Cache 120
- Creating SSD Cache 121
- Collecting Physical Disk Data 122
- Recovery Operations 123
- Initializing A Physical Disk 124
- Initializing A Virtual Disk 125
- Redistributing Virtual Disks 125
- Script Commands 127
- Firmware Compatibility Levels 129
- Commands Listed By Function 129
- Host Topology Commands 130
- Physical Disk Commands 130
- Remote Replication Commands 131
- Session Command 132
- Show String Command 132
- Snapshot Commands 132
- SSD Cache Commands 133
- Storage Array Commands 133
- Virtual Disk Commands 134
- Virtual Disk Copy Commands 135
- Description 137
- Parameters 138
- Autoconfigure Storage Array 144
- Blink SSD Cache 146
- Check Repository Consistency 149
- Clear Storage Array Core Dump 155
- Clear Storage Array Event Log 155
- Create Consistency Group 159
- Parameter 161
- Create Disk Group 165
- Additional Information 167
- Create Disk Pool 168
- Create Host 170
- Create Host Group 171
- Create Host Port 171
- Create iSCSI Initiator 172
- Create Remote Replication 183
- Create Snapshot Group 187
- Create Snapshot Image 190
- Enclosure Loss Protection 195
- Scheduling Snapshots (Legacy) 195
- Create Snapshot Virtual Disk 196
- Create SSD Cache 198
- Create Virtual Disk Copy 201
- Delete Consistency Group 203
- Delete Disk Group 205
- Delete Disk Pool 206
- Delete Host 206
- Delete Host Group 207
- Delete Host Port 207
- Delete iSCSI Initiator 208
- Delete Snapshot Group 209
- Delete Snapshot Image 209
- Delete Snapshot Virtual Disk 212
- Disk Schedule 212
- Delete SSD Cache 213
- Delete Virtual Disk 213
- Diagnose Remote Replication 218
- Disable Storage Array Feature 219
- Configuration 219
- Download Storage Array NVSRAM 224
- Enable Disk Group Security 224
- Enable Disk Pool Security 225
- Enable Storage Array Feature 227
- Modify Disk Pool 231
- Recopy Virtual Disk Copy 232
- Recover SAS Port MisWire 233
- Re-Create Snapshot 236
- Reduce Disk Pool Capacity 238
- Register SNMP Community 239
- Remote Replication Group 241
- Remove Remote Replication 243
- Remove Virtual Disk Copy 244
- Rename SSD Cache 247
- Replace Physical Disk 248
- Reset iSCSI IP Address 249
- Reset RAID Controller Module 249
- Resume Remote Replication 255
- Resume Snapshot Virtual Disk 258
- Resume SSD Cache 259
- Revive Disk Group 259
- Revive Disk Pool 260
- Revive Physical Disk 260
- Revive Snapshot Group 261
- Revive Snapshot Virtual Disk 261
- Save Enclosure Log Data 262
- Save Physical Disk Log 263
- Save Storage Array Core Dump 267
- Save Storage Array Events 270
- Scheduling Snapshots 275
- Set Disk Group 278
- Set Disk Group Forced State 279
- Set Disk Pool 280
- Set Disk Pool Complete 281
- Set Enclosure Attribute 281
- Set Enclosure Identification 282
- Set Event Alert Filtering 283
- Set Host 284
- Set Host Channel 285
- Set Host Group 286
- Set Host Port 287
- Set iSCSI Initiator 287
- Set iSCSI Target Properties 288
- Set Physical Disk Hot Spare 289
- Set Physical Disk State 290
- Set RAID Controller Module 290
- Syntax Element Statement Data 292
- Virtual Disk 294
- Set Remote Replication 294
- Set Remote Replication Group 296
- Set Session 300
- Set Snapshot Group Attributes 301
- Set Snapshot Group Media Scan 302
- Set Snapshot Group Schedule 304
- Set Storage Array 310
- Set Storage Array Learn Cycle 315
- Set Storage Array Time 317
- Set Virtual Disk 319
- Cache Flush Modifier 326
- Cache Without Battery Enabled 326
- Modification Priority 326
- Set Virtual Disk Copy 327
- Set Virtual Disk Mapping 328
- Show Blocked Events 329
- Show Current iSCSI Sessions 331
- Show Disk Group 332
- Show Disk Pool 334
- Show Host Ports 334
- Show Physical Disk 335
- Show RAID Controller Module 338
- Show Remote Replication Group 339
- Progress 340
- Show SNMP Communities 342
- Minimum Firmware Level 343
- Show Snapshot Group 344
- Show Snapshot Image 346
- Show Snapshot Virtual Disks 347
- Show SSD Cache 348
- Show SSD Cache Statistics 349
- Show Storage Array 352
- Show Storage Array Core Dump 356
- Show String 359
- Show Thin Virtual Disk 359
- Show Virtual Disk 361
- Show Virtual Disk Copy 363
- Start Disk Group Blink 367
- Start Disk Group Defragment 368
- Start Disk Group Export 368
- Start Disk Group Import 369
- Start Disk Pool Locate 369
- Start Enclosure Blink 370
- Start iSCSI DHCP Refresh 370
- Start Physical Disk Blink 371
- Start Snapshot Rollback 375
- Start Snapshot Image Rollback 376
- Start Storage Array Blink 378
- Stop Disk Group Blink 383
- Stop Disk Pool Locate 383
- Stop Enclosure Blink 383
- Stop Physical Disk Blink 384
- Stop Snapshot Group Image 385
- Stop Snapshot (Legacy) 386
- Stop Snapshot Rollback 388
- Stop Snapshot Image Rollback 389
- Stop Snapshot Virtual Disk 390
- Stop Storage Array Blink 392
- Stop Virtual Disk Copy 393
- Suspend Remote Replication 394
- Suspend SSD Cache 395
- Test SNMP Trap Destination 397
- Unregister SNMP Community 398
- Update SNMP Community 398
- Update SNMP Trap Destination 400
- Sample Script Files 403
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