RAID Types for the A+ Certification Exams

RAID (Redundant Array of Inexpensive Disks) is a method of implementing redundancy (duplicated information) on your hard drives — if one disk fails, the other disk(s) can provide the missing information. There are many different levels of RAID, but the following are the only RAID levels pertinent to the A+ exams:

• RAID 0: Disk striping (striped volume)

• RAID 1: Disk mirroring/duplexing (Mirrored volume)

• RAID 5: Disk striping with parity (RAID 5 volume)