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Storage by Mind Map: Storage
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Hard Disks

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

can store data using longitudinal recording or perpendicular recording

Characteristics of a hard disk


The hard disk arms move the read/write head, which reads items and writes items in the drive

A head crash occurs when a read/write head touches the surface of a platter

Always keep a backup of your hard disk


network attached storage

external hard disk

removable hard disk

Internal and external hard disks are available in miniature sizes (miniature hard disks)

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




Archive disc

Picture CD


Blu-ray Disc-ROM (BD-ROM)


Objectives Overview

Describe the characteristics of an internal hard disk including capacity, platters, read/write heads, cylinders, sectors and tracks, revolutions per minute, transfer rate, and access time

Differentiate between storage devices and storage media

Discuss the purpose of network attached storage devices, external and removable hard disks, and hard disk controllers

Describe the various types of flash memory storage

Describe cloud storage and explain its advantages

Describe the characteristics of optical discs

Differentiate among various types of optical discs: CDs, archive discs and Picture CDs, DVDs, and Blu-ray Discs

Identify the uses of tape, magnetic stripe cards, smart cards, microfilm and microfiche, and enterprise storage


A storage medium

holds data, instructions, and information for future use


storage device

Access time

Flash 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

Developed by the PCMCIA

Commonly used in notebook computers

Cloud Storage

an Internet service that provides storage to computer users

Users subscribe to cloud storage for a variety of reasons

Other Types of Storage


magnetic stripe card

smart card

Microfilm and microfiche


Various storage media and storage devices

Internal hard disks, external and removable hard disks, solid state drives, memory cards, USB flash drives, ExpressCard modules, cloud storage, CDs, DVDs, and Blue-ray Discs, tape, smart cards, and microfilm and microfiche