Exam SK0-005 topic 1 question 371 discussion

The correct answer is D. RAID 6. 🔹 Why? RAID 6 offers high redundancy by using two parity blocks. It can tolerate up to two disk failures without losing data. Since the administrator wants the most redundancy, RAID 6 is better than RAID 5 (which can only survive one disk failure). 🔹 Quick overview of the other options: RAID 0: No redundancy (just speed). RAID 1: Mirrors disks, but with four disks, you would only get the capacity of two disks. RAID 5: Some redundancy (can survive one disk failure), but less than RAID 6.

Explanation: RAID 6 provides the most redundancy while using four disks by implementing dual parity. This allows the system to tolerate up to two simultaneous drive failures without data loss, which is the highest level of redundancy among the options provided.

B. The most redundancy would be raid 1. This would mirror every drive in the raid allowing up to 3 drives to fail. Raid 6 allows 2 drives to fail. So the “best” redundancy would be raid 1 even though in a real server an admin would more likely choose raid 5/6 to have more space then only a single drive.

Definitely not D. RAID6 allows only 2 disks to fail, while RAID1 in this scenario, with 4 disks, allows 3 of them to fail. Hence RAID1 is more redundant. Answer is B

D. RAID 6. RAID 6 offers the highest level of redundancy among the options listed. In RAID 6, data is striped across all disks in the array, similar to RAID 5. However, in addition to striping, RAID 6 also includes two sets of parity data distributed across all disks. This means that RAID 6 can tolerate the failure of up to two disks in the array without losing data, providing an extra level of protection compared to RAID 5.