US Patent 10019194 Eventually consistent synchronous data replication in a storage system

Described embodiments provide systems and methods for operating a storage system. One or more production volumes of the storage system are selected for continuous replication. A number, N, is selected that is associated with a number of damaged volumes the storage system can sustain and maintain data consistency. Write transactions from a host to an associated one of the selected one or more production volumes are intercepted. The intercepted write transactions are sent to the associated production volume and to a plurality of copy volumes. When acknowledgments of the write transaction have been received from N copy volumes, the write transaction is acknowledged to the host.