I have a NetApp FAS2220 running OnTap 8.2.2 in 7 Mode in HA configuration with an aggregate, a volume, and a LUN on each controller and a CIFS share on one of the controllers for file serving purposes. The NetApp is connected via iSCSI to two standalone Server 2012 R2 Hyper-V Hosts. I do also have SCVMM 2012 R2 running on a VM on one of the hosts.
LUN1 on FAS2220 Controller A is assigned to and mapped as a drive to store the VMs and VHDs on Hyper-V Host 1 and LUN 2 on FAS2220 Controller B is assigned to and mapped as a drive to store the VMs and VHDs on Hyper-V Host 2. There are a few production servers running on Hyper-V Host 1, no production servers on Hyper-V Host 2 at this time.
I realize that this should have been setup as the NetApp in 7 Mode and the Hyper-V Hosts in a cluster accessing a single LUN on the NetApp as a Cluster Shared Volume and am trying to find the best way to switch it over with as minimal downtime as possible. Is there a safe and recommended way, with minimal down time, to do this? Or do I have to start all over? Also, do I have to do something different with the LUNs on the NetApp to make it work as a Cluster Shared Volume? Do I just move everything to one LUN and get rid of the other? I do have plenty of unassigned disks yet so if I have to create an entire new volume and the CSV first and then move things over, I have plenty of space to do that with.