Yes - you're looking at the Incremental Attach feature of VNX Replicator.  There was a really good discussion of the process and commands here.  Have a look and let us know if that helps!  Karl
I'm in the process of migrating our production storage array (VNX7500) to a new array (VNX8000). Today the VDMs and Filesytems are replicated between the VNX7500 and our DR array (DR-VNX5700). For example we have the following nas_replicate sessions in place:  rep_vnx7500vdm1    (vdm replication) rep_test_filesystem (file system replication)  To complete the migration from the VNX7500 to the VNX8000 I have setup migration replication sessions to the VNX8000. Once synced I plan to do the switchover of the VDM and its corresponding filesystems.  Originally I was planning to replicate the VNX8000 copies (prior to the switchover) to our DR-VNX5700. This would ensure we have the copy after the switchover and it is already setup and running. However this means we essentially have two of the same copies on the DR-VNX5700.  My question is, would it be possible to replicate the VNX8000 VDM and filesystems to the copies on the DR-VNX5700 after the switchover without copying all the data? I'm thinking the high-level steps would be:  1. Replicate VNX7500 to DR-5700 (already in place) 2. Replicate VNX7500 to VNX8000 3. Stop activity to VNX7500 4. Refresh all replications (both ones to VNX8000 and DR-VNX5700) 5. Switchover from VNX7500 to VNX8000 6. Delete replication from VNX7500 to DR-VNX5700 7. Create replication from VNX8000 to DR-VNX5700 using existing VDM/file system replicas from step 6. Ideally with no sync. 8. Resume activity to the VNX8000
VNX File Replication - Re-use Existing Replica