That's a pity, but good to know. So if I want my 16TB Volume to have checksums of file contents (against bit-rot), there's only ZFS left, with its own problems (not in kernel, eats a lot of Ram).
Does this mean I can use 4 x 16TB? The wiki is a bit confusing, it says: "Max Raw Capacity 48 TB (12 TB drive x 4)" and "Max Single Volume Size 16 TB". What about 2x12 and 2x14 for example?