Use this formula to calculate the internal volume capacity for a CLPR:

Internal volume capacity for a CLPR = 
[(number of (3D+1P) parity groups) × (capacity of one drive) × 3] +
[(number of (6D+2P) parity groups) × (capacity of one drive) × 6] +
[(number of (7D+1P) parity groups) × (capacity of one drive) × 7] +
[(number of (14D+2P) parity groups) × (capacity of one drive) × 14] +
[(number of (2D+2D) parity groups) × (capacity of one drive) × 2]

Do not use this formula for an external volume or virtual volume.