Chapter 7 Computer

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Storage

holds data, instructions, and information for future use

storage medium

is the physical material on which a computer keeps data, instructions, and information

Capacity

the number of bytes a storage medium can hold

Kilobyte (KB)

1 thousand

Megabyte (MB)

1 Million

Gigabyte

1 Billion

Terabyte (TB)

I trillion

Petabyte (PB)

1 Quadrillion

Exabyte

1 Quintillion

Zettabyte

1 Sextillion

storage device

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

Access time

measures the amount of time it takes a storage device to locate an item on a storage medium
The time required to deliver an item from memory to the processor

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

Formatting

the process of dividing the disk into tracks and sectors so that the operating system can store and locate data and information on the disk

hard disk

arms move the read/write head, which reads items and writes items in the drive (location often is referred to by its cylinder

head crash

Occurs when a read/write head touches the surface of a platter

RAID

(redundant array of independent disks) is a group of two or more integrated hard disks

network attached storage

(NAS) device is a server connected to a network with the sole purpose of providing storage

external hard disk

a separate free-standing hard disk that connects to your computer with a cable or wirelessly

removable hard disk

a hard disk that you insert and remove 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 of the computer

Flash memory chips

a type of solid state media and contain no moving parts

Solid state drives

(SSDs) have several advantages over magnetic hard disks:

memory card

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

ExpressCard module

a removable device that fits in an ExpressCard slot

Cloud storage

an Internet service that provides storage to computer users

optical disc

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

Optical Disk

typically stores software, data, digital photos, movies, and music

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

CD-ROM

can be read from but not written to

CD-R

multisession optical disc on which users can write, but not erase

CD-RW

is an erasable multisession disc

Archive disc

Stores photos from online photo center, resolution is usually is 7200 pixels.

Picture Disk

Single-session CD-ROM that stores digital version of film

DVD-ROM

a high-capacity optical disc on which users can read but not write or erase

Tape

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

tape drive

reads and writes data and information on a tape

Magnetic tape

Is now used for back-ups

magnetic stripe card

contains a magnetic stripe that stores information

Microfilm and microfiche

100-215 foot roll of film.
Is a small sheet of film usually about 4X6in.
Reduce the amount of paper firms must handle

Enterprise storage stores

huge volumes of data and information for large businesses

Secondary Storage

Storage media are also called ________.

Bytes

Capacity is the number of ________ a storage medium can hold.

Volatile

Most memory holds data and instructions temporarily and thus is ________.

Sectors

Formatting is the process of dividing the disk into tracks and ________, so that the operating system can store and locate data and information on the disk.

Clusters

For reading and writing purposes, sectors are grouped into ________.

Platters

A typical hard disk has multiple ________ stacked on top of one another.

Parellel Signals

EIDE is a hard disk interface that uses ________ to transfer data, instructions, and information.

Nonvolatile

Flash memory is a type of ________ memory that can be erased electronically and rewritten.

Card reader/writer

A(n) ________ is a device that reads and writes data, instructions, and information stored on memory cards

Cloud storage

Some users choose ________ instead of storing data locally on a hard disk or other media.

Windows Live Skydrive

IDrive and ________ provide backup or additional storage for any type of file.

Optical Disk

You can remove dust, dirt, smudges, and fingerprints from the surface of a(n) ________.

Burn

Many personal computers today include a CD-RW drive as a standard feature so users can ________ their own discs.

Storage

When a user issues a command to start application software, the operating system locates the program in ________ and loads it into memory.

Memory Card

A(n) ________ is a removable flash memory device that you insert and remove from a slot in a computer, mobile device, or card reader/writer.

Laser

An optical disc is a type of storage media that consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a ________.

100

Manufacturers claim that a properly cared for high-quality optical disc will last five years but could last up to ________ years.

CD-R-W

A ________ is an erasable multisession disc you can write on multiple times.

500

Microfilm has a potential life expectancy of ________ years.

Serial Signals

The SATA hard disk interface uses ________ to transfer data, instructions, and information.

X on CD

The number of kilobytes per second that a CD can process. So 75X is 75xX

Disk cache

Hard disks improve their access time by using ________.

Physical Material

A storage medium is the ________ on which a computer keeps data, instructions, and information.

Hard Disk Controller

In their personal computer advertisements, vendors usually state the type of hard disk interface supported by the ________.

Sequential Access

When writing or reading specific data, direct access is much faster than ________.

SSD'S

With available form factors of 3.5 inches, 2.5 inches, and 1.8 inches, ________ are used in all types of computers.

Laser

An optical disc is a type of storage media that consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a ________.

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