TestOut LabSim A+ Certification Practice Exam

If you want to increase storage space while also providing fault tolerance, which RAID configuration would you choose?

1. RAID 0

2. RAID 1

3. RAID 5

4. RAID 10

The correct answer is: RAID 5

Choosing RAID 5 is a sound decision for increasing storage space while also providing fault tolerance. RAID 5 utilizes striping, which spreads data across multiple disks, and integrates parity data that allows the system to reconstruct lost data in the event of a single disk failure. This means that while you gain storage efficiency (since less capacity is used for redundancy compared to RAID 1), you also have improved performance due to the simultaneous read/write operations that happen across the multiple disks. RAID 5 requires a minimum of three hard drives, and it allows for the loss of one disk without losing any data, which provides a good balance between performance and data safety. This makes it an ideal choice for environments that need both efficient storage use and protection against hardware failure. Other configurations such as RAID 0 prioritize performance but do not offer fault tolerance, as there is no data redundancy. RAID 1, while providing excellent fault tolerance by mirroring data across two disks, does not maximize available storage space efficiently. RAID 10 combines aspects of both striping and mirroring, offering good redundancy and performance but at the cost of usable capacity, as it requires a minimum of four disks and uses half the storage for mirroring purposes. Thus, for the goals of maximizing