RAID 0 offers no redundancy. It improves performance and provides additional storage but has no fault tolerance. If any drive failure occurs, the RAID array will be destroyed, with more drive in the RAID array failure probability is increased.

RAID 5 provides advanced data mirroring. Every drive contain data and a parity section which will be used to reconstuct the array in case of an hardware failure. A single drive can be missing without any data loss.

RAID 6 provides advanced data mirroring, similar to RAID 5 but in a more reliable way. Every drive contain data and a parity section which will be used to reconstuct the array in case of an hardware failure. Two drives can be missing without any data loss.

RAID 6 HERE WE GO!