Cisco Cyber Security Practice Exam

Which RAID level should be implemented to utilize capacity with redundancy for three disks?

1. RAID 0

2. RAID 1

3. RAID 5

4. RAID 10

The correct answer is: RAID 5

RAID 5 is the most suitable choice for utilizing capacity with redundancy when working with three disks. This RAID level employs striping with parity, which allows data to be distributed across the disks while also incorporating additional parity information. The key advantage of RAID 5 is that it provides fault tolerance; if one disk fails, the data can still be reconstructed using the parity information stored on the remaining disks. In a three-disk configuration, RAID 5 effectively uses the combined disk space while dedicating only one disk's worth of capacity to parity. Therefore, if you have three disks, you can use two disks' worth of space for data, while still maintaining redundancy. Other RAID levels do not meet the requirement of combining efficiency and redundancy as effectively in this scenario. For example, RAID 0 does not offer any redundancy since it is focused solely on performance by striping data across the disks without any parity or mirroring. RAID 1 duplicates the data across two disks, leading to significant capacity wastage because only half of the total capacity is usable. RAID 10, while providing strong redundancy through mirroring and striping, requires a minimum of four disks to be effective and would not utilize three disks efficiently. Thus, RAID 5 stands