replication silvering is currently not implemented what you could do is replicate when the systems are close together, then pause the replicaton, ship one system to the remote site and resume the replication  
I have two Hybrid Unity 500s that need to run asynchronous NAS replication. I have 120TB's worth of data to replicate but not a very fast pipe in between them. Is there any way to pre-seed the data for each file system? I looked through the White Paper but didn't find any text related to this feature. Thanks.
Pre-seed replicated NAS file systems on Unity 500