The 220-700 series A+ exam has been retired! See my new CompTIA A+ videos: http://www.FreeAPlus.com - RAID arrays are common ways to provide high-throughput and redundancy for groups of hard drives. In this module, you'll learn how the different RAID technologies can be used to build large-scale storage infrastructures. You'll also learn the advantages and disadvantages of the different RAID technologies and how hardware and software RAID compares.