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14 Viewing Remote Copy System Information
For more information:Issue this command:To view information on:
“About the Remote Copy Commands”
(page 222)
showrcopyConfiguration details
statrcopyLink throughput and latency statistics
statrcvvVirtual volume statistics (such as I/O
number, size, and completion time)
histrcvvHistorical volume statistics
SolutionProblem
Ensure links are up on both systems and try the command
again. For more information, see “Checking the Links
between Systems” (page 70).
If the mirror system does not respond to a command after
5 minutes (the timeout limit), an error message appears:
target system <sys_name> could not be
contacted
For more information:Issue this command:To view information on:
“Viewing Synchronization Task
Information” (page 87)
showtaskSynchronization details
“Viewing More Detail for a
Synchronization Task” (page 88)
showtask -d <task_ID>Additional details for a
synchronization task
“Viewing Earlier Synchronization Tasks”
(page 88)
showtask -t <hours>List of synchronization tasks started
within a specific timeframe
Additional Information:
• “How Remote Copy Tracks Synchronization Details” (page 86)
• “Task Management Commands for Remote Copy Synchronizations” (page 88)
• showtask information: HP 3PAR CLI Reference
• Task management information: HP 3PAR InForm OS Concepts Guide
How Remote Copy Tracks Synchronization Details
When a volume synchronization or resynchronization takes place on a system running under
Remote Copy, the system creates tasks to track the initial synchronization and the resynchronization
operations.
For example, when you use the startrcopygroup command to start (and synchronize) a Remote
Copy volume group for the first time, the system creates a task for each primary volume group that
is being started and synchronized in order to track the initial synchronization of the primary and
secondary volume groups.
Tracking Synchronous Volume Groups
For synchronous mode volume groups, the startrcopygroup command prompts resynchronization
each time it is used.
Tracking Asynchronous Periodic Volume Groups
For asynchronous periodic mode volume groups, the startrcopygroup command starts
synchronization only the first time the command is issued for a volume group. Subsequent instances
of the command do not initiate resynchronizations of asynchronous periodic mode volume groups.
86 Viewing Remote Copy System Information
- User’s Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- 8 Contents 8
- Contents 9 9
- Introduction 10
- Advisories 11
- Servers” (page 42) 12
- Remote Copy System Locations 13
- Additional Information 13
- N-to-1 Configuration 15
- 1-to-N Configuration 16
- If a Backup System Fails 18
- If the Primary System Fails 19
- IP Networks 21
- Fibre Channel Networks 22
- General Considerations 22
- General Requirements 23
- General System Restrictions 23
- General Software Restrictions 24
- Virtual Volume Considerations 25
- N-to-1 Considerations 25
- 1-to-N Considerations 26
- 5 Gathering Setup Information 29
- 6 Setting the Transport Layer 33
- Setting the Gateway 34
- For example: 35
- Increasing MTU (Optional) 37
- Configuring Ports for RCFC 38
- # showport -rcfc 39
- # showrctransport -rcfc 39
- Setting Up the Primary System 47
- Setting Up the Backup System 48
- SolutionProblem 54
- Setting Up the Backup Systems 59
- # showrcopy groups 65
- Example Unidirectional Setup 67
- Example Bidirectional Setup 76
- Part III Managing Remote Copy 85
- Volume Groups 90
- Changing One Volume Group 93
- 17 Modifying Virtual Volumes 95
- Renaming Virtual Volumes 96
- 18 Limiting Throughput 97
- Removing Throughput Limits 98
- 19 Optimizing Performance 99
- Volume Group Mode 100
- Additional Information: 103
- (page 104) 103
- Primary System (System1) 104
- Backup System (System2) 105
- Synchronous Mode 106
- Asynchronous Periodic Mode 106
- Recovering from Disaster 107
- Recovery 108
- Backup System (System1) 114
- First Backup System (System2) 126
- Primary System (SystemA) 135
- Stages of Disaster Recovery 139
- Failover 141
- Transfer) 151
- Part V Remote Copy Concepts 180
- Remote Copy Pairs 181
- Overview of Targets 181
- Target Definitions 181
- Remote Copy Target System 182
- Remote Copy Target System 183 183
- 25 Remote Copy Links 184
- Links per Remote Copy Pair 185
- Receiving Links 186
- 26 Virtual Volumes and CPGs 187
- Basic Information about CPGs 188
- Creating a CPG 188
- 27 Volume Groups 190
- How Volume Groups Work 191
- How Volume Groups Are Named 191
- Unidirectional Volume Groups 192
- Bidirectional Volume Groups 192
- 28 Volume Group Modes 194
- 196 Volume Group Modes 196
- Types of Synchronization 197
- Full Synchronization 198
- Resychronization 199
- Resynchronization 202
- 30 Remote Copy Snapshots 203
- Snapshots in Synchronous Mode 204
- 206 Remote Copy Snapshots 206
- 31 Error Handling 207
- Failure of All Links 208
- Failure of a Storage System 209
- Write Errors 209
- Read Errors 210
- Sync States 211
- Part VI Appendices 212
- A Quick Setup Guide 213
- (continued) 217
- Issuing Remote Copy Commands 223
- D The Remote Copy Commands 224
- 226 The Remote Copy Commands 226
- 228 The Remote Copy Commands 228
- 230 The Remote Copy Commands 230
- AUTHORITY 232
- SUBCOMMANDS 232
- 234 The Remote Copy Commands 234
- SPECIFIERS 235
- RESTRICTIONS 236
- EXAMPLES 236
- 238 The Remote Copy Commands 238
- 240 The Remote Copy Commands 240
- 1:4:1:23410002AC000060 241
- 242 The Remote Copy Commands 242
- # dismissrcopyvv vv1 Group1 244
- 244 The Remote Copy Commands 244
- # growvv vv1 2t 245
- # removercopygroup Group1 249
- 250 The Remote Copy Commands 250
- # removercopytarget System1 251
- # removercopytarget System2 251
- 256 The Remote Copy Commands 256
- 258 The Remote Copy Commands 258
- 260 The Remote Copy Commands 260
- 264 The Remote Copy Commands 264
- 268 The Remote Copy Commands 268
- # showrctransport 269
- # startrcopy 272
- 272 The Remote Copy Commands 272
- # startrcopygroup Group1 273
- 274 The Remote Copy Commands 274
- # stoprcopy -stopgroups 284
- 284 The Remote Copy Commands 284
- # stoprcopygroup Group1 285
- 286 The Remote Copy Commands 286
- # syncrcopy Group1 287
- # syncrcopy -pat testgroup* 288
- 288 The Remote Copy Commands 288
- 290 Index 290
- 292 Index 292
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