HP Storage Mirroring V5 Software - Manual (Page 138)

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How Failure Detection Works
1. The target sends a monitor request to each monitored IP address at a user-defined interval. A monitor reply is sent from
the source back to the target.
2. When the user-defined number of missed packets is met, the address is considered failed.
Client Connectivity
Depending on the type of client workstations, the timeout settings, and the applications in use, the clients may notice only a
slight pause while the failover process occurs. If the failover timeout is set to a duration such as several minutes, clients may
see an Abort or Retry message at their machine if they try to communicate with the source before the timeout has expired
and the failover process has completed. For most 32-bit clients and network aware applications, reconnection is automatic.
In the case of older client software, the workstation may need to be rebooted to reestablish a connection to the target, which
is now acting as the source.
Request
Monitor
Request
Monitor
Request
Monitor
Request
Monitor
Request
Monitor
Reply
Monitor
Reply
Monitor
Reply
Monitor
Request
Monitor
Reply
Missed
Reply
Missed
Reply
Missed
Begins
Failover