SnapMirror using ONTAP 8.3.2 to ONTAP 9.8

Hi everyone,

I have an ongoing project and they have old NetApp FAS2552 currently used for NFS Volume Share and LUN VMware Datastore, customer ask me to do migrate from their FAS2552 which is still using ONTAP 8.3.2 to their new system FAS2720 using ONTAP 9.8 from Factory.

My questions is

1. Could i perform SnapMirror migrate with these 2 far different ONTAP version between ONTAP 8.3.2 and ONTAP 9.8?

2. If we should upgrade the ONTAP 8.3.2 first to ONTAP 9.8 do this causing downtime?

*Note, No Intercluster Switch are available.