Order the servers from lowest to highest usable capacity.
A.
2RU (6 x 1 TB), 2RU (12 x 1 TB), 2RU (6 x 2 TB), 2RU (12 x 2 TB)
B.
2RU (6 x 1 TB), 2RU (6 x 2 TB), 2RU (12 x 1 TB), 2RU (12 x 2 TB)
C.
2RU (12 x 2 TB), 2RU (12 x 1 TB), 2RU (6 x 2 TB), 2RU (6 x 1 TB)
D.
2RU (12 x 2 TB), 2RU (6 x 2 TB), 2RU (12 x 1 TB), 2RU (6 x 1 TB)