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Discovering Computers: Fundamentals

Hard disk

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

Capacity

Number of bytes (characters) a storage medium can hold

Longitudinal recording/ Perpendicular Recording

Number of platters it contains, and the composition of the magnetic coating on the platters

Network attached storage (NAS)

device is a server connected to a network with the sole purpose of providing storage.

Raid

Redundant array of independent disks configuration

External hard disk

Separate freestanding hard disk that connects with a cable to a USB or Firewire port on the system unit or communicates wirelessly

Removable hard disk

Can be inserted or removed from a drive

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 in the computer.

Solid state media

Consist entirely of electronic components and contain no moving parts

Solid state drive

SSD; Storage device that uses flash memory to store data, instructions, and information.

Memory card

Removable flash memory device that you insert and remove from a slot in a computer, mobile device, or card reader/writer

USB Flash drive

Flash memory storage device that plugs in a USB port on a computer or mobile device

Expresscard Module

Removable device that fits in an Expresscard slot.

Cloud Storage

Internet service that provides storage for computer users

Optical disc

type of storage media that consists of a flat round portable disc made of metal, plastic, and lacquer

CD-Rom

a CD that contains data a computer can read, but to which the computer cannot write new data

CD-R

Multi-session disc on which users can write, but not erase

CD-RW

Compact disc rewritable Erasable and can be written on multiple times

Archive disc

Used to store photos from a photo sharing community in the jpg file format

Picture CD

stores digital versions of film using a jpg file format

DVD-ROM

High capacity disc which users can read but not write on or erase

Blu-ray Disc

(BD) currently has storage capacities of 100 GB

HD-VMD

Versatile Multilayer Disc high density format with a capacity of 40 GB or more

DVD-RW, DVD-+RW, , DVD-RAM

3 Competing high-capacity rewritable DVD formats

BD-RE

High-capacity rewritable DVD format

Tape

Magnetically coated ribbon plastic capable of storing large amounts of data and information at a low cost

Magnetic stripe card

Credit card, entertainment card, bank card, or other similar card with a stripe that contains information identifying you and the card.

Smart card

Similar in size to ATM card stores data on a thin microprocessor embedded in the card

Microfilm

100 -215 foot roll of film

Microfiche

Small sheet of of film usually about 4 x 6 inches

Access time

Measures the amount of time it takes a storage device to locate an item on a storage medium

RAID

Group of 2 or more integrated hard disks

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 in the computer.

USB Flash drive

A flash memory storage device that plugs into a USB port or a computer or mobile device.

Users subscribe to a cloud storage service for

Access files from any computer that has Internet access, allow others to access their files, store offsite backups of data

LightScribe

Technology works with specially coated optical discs to etch labels directly on the disc

What storage requires sequential access

Tape

Magnetic stripe

Strips of magnetic tape, which are usually, found on the back of plastic credit and debit cards. The strip usually holds information concerning Customers name and Account number

Backup

Duplcate of a file, program, or disk placed on a separate storage medium that you can use in case the original is lost, stolen, or destroyed

Solid state Media

Media which consist entirely of electronic components, such as integrated circuits, and contain no moving parts

Solid state drive

Storage device that typically uses flash memory to store data,instructions, and information

Card reader/writer

Device that reads and writes data, instructions, and information stored on memory cards

External hard disk

A separate freestanding hard disk that connects with a cable to a USB port or Firewire port on the system unit or communicates wirelessly

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