Method used to calculate RAID capacity

If the number of RAID member disks is N (excluding hot spare disks), available capacity of RAID 0 = N x disk capacity.
Available capacity of RAID 1 = N x Disk capacity/Number of mirror groups
Available capacity of RAID 3 = (N-1) x Disk capacity
Available capacity of RAID 5 = (N-1) x Disk capacity
Available capacity of RAID 6 = (N-2) x Disk capacity
Available capacity of RAID 10 = N x Disk capacity/Number of mirror groups
Available capacity of RAID 50 = (N-2) x Disk capacity

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