If you had four identical drives, which of these RAID types would provide both redundancy and the most available storage space for your data?
A) RAID 0
B) RAID 1
C) RAID 2
D) RAID 5
E) RAID 1+0
F) If my files are redundant, does that make them twice as awesome?
The answer: D) RAID 5
RAID 0 does not provide redundancy, and RAID 1 and 1+0 are mirroring data and therefore are effectively limiting available storage space by 50%.
RAID 5 also provides redundancy, but it only uses the space of a single drive for the redundant parity data. With four drives, this means that RAID 5 would provide data storage that was equal to three of the four disks, or 75% of the total disk space.
Want to know more? Watch “An Overview of RAID”
The throughput and redundancy advantages of RAID are used in numerous computer systems. In this video, you’ll learn about RAID 0, RAID 1, RAID 5, and RAID 1+0.