If you reassign the partitions to one controller then to just create an active/passive solution. The $$$ spent on the two controllers is basically wasted. You won’t get the performance out of the box
make two aggregates, one on each controller
if you need all the space on one volume, look at using a FlexGroup.
Otherwise, make two aggregates and split your loads between the aggregates. Be sure to put data LIFs on both controllers as well