Is it possible to migrate data from 7-Mode(8.1.1) iSCSI volume to C-Mode(8.2.2) FC volume. If so, how would you set it up ?
You can look at the transition guide https://library.netapp.com/ecmdocs/ECMP1213598/html/index.html
A snapmirror from 7 mode to Cluster mode for DR purpose is not supported.
as with the other reply, the transition tool is the key...
that will do what you need.
to FC/ISCSI bit is not relevent, you can connect to the LUN however you want, it's just about getting the data from 7 to cdot
7MTT is the way to go. Highly recommend version 2.0