Huawei Certified ICT Associate – Cloud Service v3 (HCIA-Cloud Service) — Question 6

Which of the following RAID technologies provides the highest space utilization for a RAID group with 10 disks? (Choose all that apply.)

Answer options

• A. RAID 6 (8D+2P)
• B. RAID TP (7D+3P)
• C. RAID 5 (9D+1P)
• D. RAID 1

Correct answer: A, C

Explanation

RAID 6 and RAID 5 are designed to provide data redundancy while maximizing usable disk space. RAID 6 uses two disks for parity, resulting in 80% space utilization, while RAID 5 uses one disk for parity, achieving 90% utilization. In contrast, RAID 1 mirrors data, leading to only 50% space efficiency, and RAID TP is less efficient than both RAID 5 and RAID 6.