TestOut LabSim A+ Certification Practice Exam

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What is an advantage of RAID 5 over RAID 1?

RAID 5 provides higher redundancy
RAID 5 improves performance over RAID 1
RAID 5 requires fewer disks
RAID 5 maintains data even with one disk failure

The correct answer is: RAID 5 improves performance over RAID 1

RAID 5 offers improved performance compared to RAID 1 primarily because it uses striping with parity. This setup allows for both read and write operations to occur simultaneously across multiple disks, leading to faster data access and increased throughput. While RAID 1 also provides redundancy by duplicating data across disks, the performance benefits are mainly due to the way RAID 5 distributes data and parity information. In terms of redundancy, RAID 5 does provide a good level of data protection with its ability to tolerate a single disk failure, but this isn't considered an advantage over RAID 1, which mirrors the data for high redundancy. RAID 1 requires at least two disks, while RAID 5 can operate with a minimum of three, making it more efficient in terms of storage usage and fewer disks needed to achieve fault tolerance. The combination of these factors illustrates why RAID 5 is often chosen for environments that require both efficiency and performance alongside fault tolerance.