The Secondary must be synchronized with the Primary to have consistent data at all times. Before a Primary can replicate data to a Secondary, or after Replicator Log volume overflows, you must make a block-for-block copy of the data on the Primary to the Secondary, to synchronize the data in the RVGs.

Choose an appropriate method, depending on your environment, bandwidth available on your network, the rate at which the application updates, and the size of the data to be replicated.