RAID-3 provides striping across several disks and adds an extra disk where all parity information is written. The loss of any one disk can be tolerated, because all data can be rebuilt from the remaining disks. The loss of two disks, however, cannot be tolerated. This RAID level provides a decent MTBF (mean time between failure). The data striping can create a performance advantage, but there is a hot spot with this RAID level, because one drive provides all of the parity information. This RAID level is usually passed over for RAID-5, discussed in our next tip