Which size Avamar Gen4 storage node is supported for a RAIN configuration?

Explanation/Reference:

For Gen4 3.9TB node:

Raw capacity is 6 TB and licensed capacity is 3.9 TB

For Gen4 7.8 TB node:

Raw capacity is 12 TB and licensed capacity is 7.8 TB

So, In a RAIN config with 1 utility node and 4 storage nodes (7.8 TB), the total capacity should be 48 TB and total licensed capacity is 31.2 TB