RAID 3 – Bit-Interleaved Parity This level provides redundancy by storing parity information on a single disk in the array. This parity information can be used to recover the data on other disks should they fail. This level uses less storage space than RAID 1 but the parity disk can become a bottleneck. A diagrammatic representation of RAID 3 is shown in Figure 19.4(d).