CertiGuide to A+ (A+ 4 Real)  9  Chapter 10: The Small Computer System Interface, SCSI

Summary: SCSI Types, Standards, Speeds, Cables and Connectors 1 RAID Basics

The original acronym RAID¹¹⁷ stood for Redundant Array of Inexpensive Disks. As the technology has matured, however, it has come to be known as Redundant Array of Independent Disks¹¹⁸. University of California Berkeley researchers introduced the concept in 1988. RAID was proposed as a solu-tion to the then lagging performance of data storage. In the original proposal, a disk array would use several low cost, low capacity drives. At the time, the average MTBF (Mean Time Between Failure) for the array was less than the time for a single disk. This shortcoming was conquered by storing redundant data or parity data, which allowed continued data access or even data reconstruction in the event of disk failure.

Summary: SCSI Types, Standards, Speeds, Cables and Connectors 1 RAID Basics