Certified Construction Industry Financial Professional Exam 2026: Complete Practice Test

RAID is a way to use multiple hard drives together so data remains available and performance can improve. The standard expansion is Redundant Array of Independent Disks. Here’s why that fits: “Redundant” means there’s protection against drive failure through methods like parity or mirroring. “Array” refers to multiple drives working as a group. “Independent Disks” highlights that the drives are separate devices, not a single larger drive. This combination describes the concept behind RAID: data is spread across multiple independent disks in a redundant arrangement to improve reliability and, in many configurations, speed. While some older sources use Redundant Array of Inexpensive Disks, the common modern meaning is Redundant Array of Independent Disks, which is why it’s the best match.