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System Information during Failover for N-to-1 Configurations
Synchronous Mode for N-to-1 Configurations
When a failure occurs on systems with synchronous mode volume groups such that all links between
the systems are broken, the following actions occur:
• After 10 seconds, the system marks the sending links as Down.
• After another 10 seconds, the system marks the targets as failed.
Asynchronous Periodic Mode for N-to-1 Configurations
When a failure occurs on systems with asynchronous periodic mode volume groups such that all
links between the systems are broken, the following actions occur:
• After 60 seconds, the system marks the sending links as Down.
• After another 200 seconds, the system marks the targets as failed.
Example Output after Primary System Failure for N-to-1 Configurations
If a primary system containing asynchronous periodic mode volume groups (System2) becomes
unavailable, 300 seconds later the showrcopy output on the backup system (System1) looks
like the following:
# showrcopy
Remote Copy System Information
Status: Started, Normal
Target Information
Name ID Type Status Options Policy
System2 7 IP failed mirror_config
System3 8 IP ready mirror_config
Link Information
Target Node Address Status Options
System2 0 10.100.33.96 Down
System2 1 10.101.33.96 Down
System3 0 10.100.33.11 Up
System3 1 10.101.33.11 Up
receive 0 10.100.33.96 Up
receive 1 10.101.33.96 Up
Group Information
Name Target Status Role Mode Options
periodic_group_1.r96 System2 Stopped Secondary Periodic over_per_alert
LocalVV ID RemoteVV ID SyncStatus LastSyncTime
remotevv.0 21 localvv.0 413 Stopped Thu Dec 14 18:23:52 PST 2006
remotevv.1 22 localvv.1 414 Stopped Thu Dec 14 18:23:52 PST 2006
Name Target Status Role Mode Options
periodic_group_2.r11 System3 Started Secondary Periodic over_per_alert
LocalVV ID RemoteVV ID SyncStatus LastSyncTime
remotevv.2 23 localvv.0 385 Synced Thu Dec 14 18:23:45 PST 2006
remotevv.3 24 localvv.1 386 Synced Thu Dec 14 18:23:44 PST 2006
Recovering from Disaster for N-to-1 Configurations
Follow these failover and recovery guidelines to recover from system failure.
184 Disaster Recovery for M-to-N Configurations
- HP 3PAR OS 3.1.3 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- 8 Contents 8
- Contents 9 9
- Servers” (page 39) 12
- Requirements 13
- Requirements 15 15
- 1-to-1 Configuration 16
- N-to-1 Configuration 17
- 1-to-N Configuration 18
- M-to-N Configuration 19
- Network Connection Types 23
- Fibre Channel Networks 24
- 4 Gathering Setup Information 25
- 5 Setting the Transport Layer 26
- RCIP Initial Remote-Copy Pair 27
- Configuring Ports for RCIP 30
- Setting the Gateway 31
- Increasing MTU 33
- Configuring Ports for RCFC 35
- # controlport offline 2:3:1 36
- 1-to-1 Remote Copy 40
- N-to-1 Remote Copy 40
- 1-to-N Remote Copy 41
- ◦ HP 3PAR T-Class Storage 44
- ◦ HP 3PAR F-Class Storage 44
- M-to-N Remote-Copy Examples 45
- # showrctransport -rcfc 48
- # startrcopy 48
- 7 Setting Up SLD Remote Copy 56
- ◦ IP—Specifies an IP link 58
- 60 Setting Up SLD Remote Copy 60
- For RCFC 61
- For RCIP 61
- SLD Remote-Copy Example 62
- # showrcopy groups 69
- Configuration 71
- 72 Setting Up SLD Remote Copy 72
- 74 Setting Up SLD Remote Copy 74
- • For RCIP remote-copy pairs: 77
- • For RCFC remote-copy pairs: 78
- # showrcopy 80
- 9 Bidirectional Configuration 86
- Part III Managing Remote Copy 92
- # stoprcopy -stopgroups 94
- Additional Information 95
- Remote-Copy Pairs 99
- Overview of Targets 99
- Target Definitions 99
- Remote-Copy Target System 100
- Remote-Copy Target System 101 101
- 13 Remote-Copy Links 102
- Links per Remote-Copy Pair 103
- Receiving Links 104
- Growing Virtual Volumes 107
- Renaming Virtual Volumes 108
- Virtual Volumes and CPGs 108
- Basic Information about CPGs 109
- Creating a CPG 109
- 15 Working with Volume Groups 110
- How Volume Groups Work 111
- How Volume Groups Are Named 112
- Unidirectional Volume Groups 113
- Bidirectional Volume Groups 113
- Synchronous Mode 116
- Asynchronous Periodic Mode 116
- Changing One Volume Group 117
- Setting Volume Group Policies 118
- Volume Group Modes 120
- Synchronization 122
- Types of Synchronization 123
- Full Synchronization 124
- Resynchronization 125
- 16 Optimizing Performance 128
- Limiting Throughput 129
- Removing Throughput Limits 130
- HP 3PAR Peer Persistence 134
- HP 3PAR Peer Persistence 135 135
- Manual Transparent Switchover 137
- HP 3PAR Peer Persistence 139 139
- Path Management Policies 149
- Configuring ESX Host Personas 155
- 20 Error Handling 156
- Failure of a Single Link 157
- Target failure 157
- 158 Error Handling 158
- Failure of a Storage System 159
- Write Errors 159
- Read Errors 160
- Read Errors 161 161
- Primary System (System1) 166
- Secondary System (System2) 166
- Switchover 168
- (page 172) 171
- Backup System (System2) 173
- Transfer) 219
- Failover 236
- Recovery 238
- Part V Reference 251
- 25 Quick Setup Guide 252
- (continued) 256
- 27 Using Remote Copy Commands 261
- Issuing Remote-Copy Commands 262
- Starting the vSphere Client 263
- Quorum-Witness CLI Commands 265
- Stopping a Quorum Witness 266
- Removing a Quorum Witness 266
- Quorum Troubleshooting 267
- • Active sysmgr logs 269
- • qw logs on each node 269
- 29 Remote-Copy Snapshots 270
- Snapshots in Synchronous Mode 271
- If the Backup System Fails 272
- If the Primary System Fails 272
- Contacting HP 274
- HP 3PAR documentation 274
- Typographic conventions 277
- HP 3PAR branding information 277
- 31 Documentation feedback 278
- Glossary 279
- 280 Glossary 280
- 282 Index 282
- 284 Index 284
- 286 Index 286
- 288 Index 288
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