Sunday, October 30, 2011

Ch. 6 Definitions (part 1)

STORAGE MEDIUM: also called SECONDARY STORAGE, is the physical material on which a computer keeps data, instructions, and information.

CAPACITY: is the number of bytes (characters) a storage medium can hold.

STORAGE DEVICE: is the computer hardware that records and/or retrieves items to and from storage media.

READING: is the process of transferring these items from a storage medium into memory.

ACCESS TIME: measures the amount of time it takes a storage device to locate an ite, on a storage medium.

HARD DISK: is a storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information.

LONGITUDINAL RECORDING: aligned the magnetic particles horizontally around the surface of the disk.

PERPENDICULAR RECORDING: align the magnetic particles vertically, or perpendicular to the disk's surface, making much greater storage capacities possible.

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