we have been using FAS2040 (NetApp Release 8.1.4P7 7-Mode) since few years now and been happy with it. Because of space contraints and upgrade reason, have decided to purchase FAS2720 Filer. The question is what is the standard method for data migration from Old to new Filer? Our existing Netapp has dual controller and has around 15 TB Data which is mounted via NFS on client side. It does also have some shares used as Datastores for Virtual machines. So some virtual machines are running purely on Netapp share. We do not have LUNs. What we have instead only Disk Groups, Volumes and Qtrees. Does data migration work at Volume level or Qtree level? We would like to retain the structure of the old Netapp onto new Netapp. So we do not mind 1:1 transition during data migration. I would like to ask the community what is the best method for the data migration to be used? Perhaps without additional cost. How much time does it require for 15 TB Data to be fully transferred? Accordingly we have to plan the shutdown of the hosts as well. I am completely new when it comes to Data migration between netapp. Please suggest me pointers for this. Also suggest if any other valid points to consider during new netapp installation and data migration.