There is no shell access, but you can use the Data Replication feature that is built in the DSS and use a loop back IP Address 127.0.0.1, create a small snapshot and assign to the NAS volume then set one of the shares to be the destination. See link

November 2010
Open-E DSS Asynchronous Data Replication within a System

http://www.open-e.com/service-and-support/library/how-to-resources/?page=3