VMax SRDF initial establish

In our environment, we have VMax and DMX4 (and also VNX etc)

Currently, when we receive a storage request requiring SRDF, we do the following (e.g. 1TB required on both sides):

1) Create devices on both sides (1TB each)

2) Run symrdf command to create the pair

3) Establish the SRDF link (this copies 1TB of data across DWDM)

4) Present the device to the host

5) Done

However the copying of the 1TB data during the establish is useless, as the device has not yet been presented to the host, and contains no useful information.

We would like to avoid this initial copy across the DWDM.

Is there any way to "zero" the disk, or some way to say "only copy the changes after SRDF established"? How is the community doing this sort of changes right now?

Thanks,
Kelvin