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20 error handling, 22 disaster recovery for 1-to-1 configurations, 23 disaster recovery for m-to-n configurations – HP 3PAR Operating System Software User Manual

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Setting Associated Local and Remote CPGs for Remote-Copy Groups......................................153
Automatically Creating Target Volumes on the Secondary System...........................................154
Automatically Deleting Target Volumes on the Secondary System............................................154
Coordinated Manual Grow over Remote Copy....................................................................155
Configuring ESX Host Personas..........................................................................................155

20 Error Handling.................................................................................156

Synchronization States......................................................................................................156
Timeouts for Remote-Copy Failure.......................................................................................156

Timeouts and Transient Network Problems......................................................................157

Failure of a Single Link.....................................................................................................157
Target failure...................................................................................................................157

Target Failure and Synchronous Volume Groups..............................................................157
Restarting Synchronous Volume Groups after Link Recovery...............................................158
Target Failure and Asynchronous Periodic Volume Groups.................................................158
Resynchronizing Asynchronous Periodic Volume Groups after Link Recovery........................158

Failure of a Storage System...............................................................................................159

Failure of a Primary System...........................................................................................159
Failure of a Backup System...........................................................................................159

Write Errors....................................................................................................................159

Write Errors on the Primary System................................................................................159
Write Errors on the Backup System.................................................................................159

Write Errors for Synchronous and Asynchronous Periodic Volume Groups.......................159

Read Errors.....................................................................................................................160

Read Errors during Initial Synchronization.......................................................................160
Read Errors during Synchronization after Restart of Synchronous Volume Groups.................160
Read Errors during Resynchronization of Asynchronous Periodic Volume Groups..................160

IV Recovering from Disaster........................................................................162

21 Using Peer Persistence for Non-disruptive Failover in 1-to-1 Remote Copy in
Geocluster Environments.........................................................................163

System Information during Normal Operation......................................................................166

Primary System (System1).............................................................................................166
Secondary System (System2).........................................................................................166

System Information during Failover.....................................................................................167
Performing a Non-disruptive Failover..................................................................................167

Switchover..................................................................................................................168
Troubleshooting Non-disruptive Failover.........................................................................169

22 Disaster Recovery for 1-to-1 Configurations...........................................171

System Information during Normal Operation......................................................................173

Primary System (System1).............................................................................................173
Backup System (System2).............................................................................................173

System Information during Failover for 1-to-1 Configurations...................................................174

Synchronous Mode for 1-to-1 Configurations...................................................................174
Asynchronous Periodic Mode for 1-to-1 Configurations......................................................174
Example Output after Primary System Failure for 1-to-1 Configurations................................174

Recovering from Disaster for 1-to-1 Configurations.................................................................175

Failover in 1-to-1 Remote-Copy Configurations.................................................................175
Recovery in 1-to-1 Remote-Copy Configurations...............................................................176

23 Disaster Recovery for M-to-N Configurations.........................................181

Disaster Recovery for N-to-1 Configurations.........................................................................181

System Information during Normal Operation for N-to-1 Configurations..............................182

Backup System (System1) for N-to-1 Configurations......................................................182
First Primary System (System2)..................................................................................183

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