Answer:
A Level 6 RAID
Explanation:
The best RAID to use in this case is a level 6 RAID because it has a double parity block which makes it easier to achieve better data redundancy than the level 5 RAID. This enhances the fault tolerance for upto two drive breakdowns in the array. The parity blocks for each disk are two in number and are stored on different disks across the array.
