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Chapter 7: Storage by Mind Map: Chapter 7: Storage
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Chapter 7: Storage

Storage

Capacity is the number of bytes a storage medium can hold

Storage device is the computer hardware that records and/or retrieves items to and from storage media

Acess time

Cloud storage

Cloud storage is an Internet service that provides storage to computer users

Users subscribe to cloud storage for a variety of reasons

Hard Disks

A hard disk contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information

Hard disks can store data using longitudinal recording or perpendicular recording

Characteristics of a hard disk include

Formatting

Raid (redundant array of independent disks)

network attached storage (NAS)

A disk controller consists of a special‐purpose chip and electronic circuits that control the transfer of data, instructions, and information from a disk to and from the system bus and other components of the computer

Flash StoragFlash Memory Storage

Flash memory chips are a type of solid state media and contain no moving parts

Solid state drives (SSDs)

memory card

USB flash drives

ExpressCard module

Optical Discs

An optical disc consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser

Typically store software, data, digital photos, movies, and music

Read only vs. rewritable

Optical discs commonly store items in a single track that spirals from the center of the disc to the edge

Track is divided into evenly sized sectors

Care of optical discs

Other Types of StoragOther Storage

Tape is a magnetically coated ribbon of plastic capable of storing large amounts of data and information

A tape drive reads and writes data and information on a tape

A magnetic stripe card contains a magnetic stripe that stores information

A smart card stores data on a thin microprocessor embedded in the card