In recent days I have configured and activated LBGM I read this redbook

and the implementation is easy. Now I have a replica every 12H

To check the last volume main change that has finished copying to the secondary site:
– Connect to SVC using CLI
– type :
IBM_2145:SVCMO:admin>lsrcconsistgrp PAUL

 and Freeze_time is the timestamp of the last completed copying
freeze_time 2012/12/18/05/02/22