HP 3PAR Operating System Software - Manual (Page 184)

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