CompTIA A+ Core 1 (220-1101) — Question 262

A technician needs to provide data redundancy on a user’s workstation. Which of the following RAID levels provides redundancy with the FEWEST disks?

Answer options

• A. RAID 0
• B. RAID 1
• C. RAID 5
• D. RAID 10

Correct answer: B

Explanation

RAID 1 provides redundancy by mirroring data across two disks, thus requiring only two disks to achieve fault tolerance. In contrast, RAID 0 offers no redundancy, RAID 5 requires a minimum of three disks for parity, and RAID 10 requires at least four disks for mirrored pairs, making RAID 1 the most efficient choice for minimal disk usage while ensuring data safety.