Which of the following describes how to calculate the amount of storage in a RAID 5 array?

This calculation would be accurate for RAID 0 if all drives are the same size, as RAID 0 uses all drive capacity for data, but it does not account for the parity overhead of RAID 5.

This formula incorrectly subtracts two drives' worth of capacity, which is not the standard calculation for usable space in a RAID 5 array.

Using the largest drive's capacity is incorrect because RAID 5 arrays are constrained by the smallest drive's capacity; any larger drives will have their excess capacity unused to maintain consistency across the array.

RAID 5 dedicates the equivalent of one drive's capacity for parity information across the array, which allows for fault tolerance. Therefore, the total usable storage is calculated by taking the number of drives minus one (for the parity overhead) and multiplying that by the capacity of the smallest drive to ensure uniform stripe sizes and prevent capacity waste from mismatched drive sizes.