ICT 202 Lecture 16: Chapter 9
10 Feb 2019
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Document Summary
Hard drives come in two major types: A newer, more expensive technology that with no moving parts. A traditional hard disk drive (hdd) is composed of individual disks, or platters, with read/write heads on actuator arms controlled by a servo motor- all contained in a sealed case that prevents contamination by outside air. Many people refer to traditional hdds as magnetic hard drives, or sometimes platter-based hard drives. Hard drives run at a set spindle speed, with the spinning platters measured in revolutions per minute (rpm) The faster the spindle speed, the faster the controller can store and retrieve data. Common speeds are: 5400, 7200, 10000, and 15000 rpm. Faster drives mean better system performance, but they can also cause the computer to overheat. Heat can cut the life of hard drives dramatically. Airflow in a case can make or break your system stability, especially when you add new drives that increase the ambient temperature.
