I am right in the middle of planning a new home NAS build, primarily for the same as most, movies, pictures etc.
My current plan is a Plus licence unRAID box with parity, swap and 'smaller' data drives, lets say 3 x 2tb.
Then I was planning a FreeNAS box just using UFS with fewer larger drives, eg 2 x 3tb.
This way my unRAID box as a daily NAS has that extra fault tolerance from the extra drives and can sync to the FreeNAS box which is used purely as the backup box with the same (or more) capacity, this allows the backup box not to need any extra licencing with potential for more larger drives for backing up other machines/unRAID's in the future if needed.
Any thoughts/warnings on this approach?