TestOut LabSim A+ Certification Practice Exam

What RAID configuration provides increased performance using only two disks?

1. RAID 1

2. RAID 0

3. RAID 5

4. RAID 10

The correct answer is: RAID 0

RAID 0 is the correct choice for providing increased performance using only two disks. In this configuration, data is split evenly across the two disks, which means that both disks can be accessed simultaneously. This striping technique enhances read and write speeds because multiple I/O operations can occur at the same time, effectively doubling the potential throughput compared to using a single disk. RAID 1, in contrast, mirrors data across two disks, which enhances redundancy and data protection but does not improve performance in terms of I/O operations. RAID 5 requires at least three disks to function and provides redundancy through parity, but it also doesn't focus solely on performance. RAID 10, which combines elements of RAID 0 and RAID 1, additionally requires a minimum of four disks for both performance and redundancy benefits. Thus, while RAID 0 is the only configuration that efficiently increases performance specifically with just two disks, the others either focus on redundancy or require more disks for their desired benefits.