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Chapter 7 Computer

STUDY
PLAY
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 ________.