Best practice to move a volume

Hi,

 

What's the best practice to move a volume from a PS4100 to another PS6100

The two PS are not in the same group.

Today we have a PS5000XV which replicate on the PS4100. The administrator have create 2 volumes on the PS4100 (because there is not enough space on the PS5000XV).

We will replace the PS5000XV with a new PS6100XV and we want to move the volume from the PS4100 to the new PS6100.

What's easier way to do this with the minimum downtime on this volume?

I think that the best is to create a replica of the 2 volume from the PS4100 to the new PS6100, disconnect the volume from the PS4100 and set online the volume on the PS6100. correct??

Thanks