HP 3PAR Operating System Software - Manual (Page 6)

22 Disaster Recovery for 1-to-N Configurations..........................................124
System Information during Normal Operation......................................................................125
Primary System (System1).............................................................................................125
First Backup System (System2).......................................................................................126
Second Backup System (System3)..................................................................................126
System Information during Failover.....................................................................................127
Synchronous Mode......................................................................................................127
Asynchronous Periodic Mode........................................................................................127
Example Output after Primary System Failure..................................................................127
Recovering from Disaster...................................................................................................128
Failover.....................................................................................................................128
Recovery....................................................................................................................129
23 Disaster Recovery for Synchronous Long Distance..................................134
System Information during Normal Operation......................................................................135
Primary System (SystemA).............................................................................................135
Synchronous Backup System (SystemB)...........................................................................136
Asynchronous Periodic Backup System (SystemC).............................................................137
System Information during Failover.....................................................................................138
Synchronous Mode......................................................................................................138
Asynchronous Periodic Mode........................................................................................138
Example Output after Primary System Failure..................................................................138
Stages of Disaster Recovery..........................................................................................139
Failing Over to the Synchronous Backup System...................................................................140
Failover.....................................................................................................................141
Recovery....................................................................................................................143
Failing Over to the Asynchronous Periodic Backup System (with Data Transfer).........................151
Failover.....................................................................................................................152
Recovery....................................................................................................................157
Failing Over to the Asynchronous Periodic Backup System (No Data Transfer)..........................167
Failover.....................................................................................................................168
Recovery....................................................................................................................170
V Remote Copy Concepts...........................................................................180
24 Remote Copy Pairs and Targets...........................................................181
Remote Copy Pairs...........................................................................................................181
Overview of Targets.........................................................................................................181
Target Definitions.............................................................................................................181
Remote Copy Target System..............................................................................................182
System Roles and Direction of Data Flow........................................................................182
Changing the Direction of Data Flow........................................................................183
System Roles and Bidirectional Configurations.................................................................183
25 Remote Copy Links............................................................................184
Sending Links..................................................................................................................184
One Link per Node per Target......................................................................................184
Links per Remote Copy Pair..........................................................................................185
Links per Multiple Remote Copy Pairs.............................................................................185
Receiving Links................................................................................................................186
26 Virtual Volumes and CPGs.................................................................187
Common Provisioning Groups............................................................................................187
How CPGs Allocate Space for Snapshots.......................................................................187
How CPGs Allocate Space for Virtual Volumes................................................................187
Basic Information about CPGs.......................................................................................188
Creating a CPG..........................................................................................................188
6 Contents