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This is Chapter 3 Review for Exam 1 which covers ch.s 1-4.

Storage medium

The part of a storage system where data is stored, such as a DVD disc.

Storage Device

A piece of hardware, such as a DVD drive, into which a storage medium is inserted to be read from or written from.
(they can be: internal, external, or remote.)

Random Access

also called direct access

Random access

means that data can be retrieved directly from any location on the storage medium, in any order.

Sequential access

the data can only be retrieved in the order in which it is physically stored on the medium. (ex. magnetic tape drive.)

What are two types of storage access?

Random access and Sequential access.


Something stored on a storage medium, such as a program, a document, or an image.


A name given to a file by the user; it is used to retrieve the file at a later time.


A named place on storage medium into which files can be stored to keep the files stored on that medium organized.

disk access time

the time it takes to locate and read data from (or position and write data to) a storage medium.

Hybrid Hard Drive

A hard drive that contains both a large amount of flash memory and magnetic hard disks

Disk Cache

Memory used in conjunction with a magnetic hard drive to improve system performance.

Optical drive

A drive used with optical discs, such as CD or DVDs.

CD disc

A low capacity (typically 650 MB) optical disc that is often used to deliver music software, as well as to store user data.

DVD disc

A medium capacity (typically 4.7 MB or 8.5 MB) optical disc that is often used to deliver software and movies, as well as to store user data.

Blu-ray disc

A high-capacity (typically 25MB or 50 MB) that is often used to deliver high-definition movies, as well as to store user data.

CD-ROM disc

A CD that can be read from, but not written to, by the user.

DVD-ROM disc

A DVD that can be read from, but not written to by the user.

BD-ROM disc

A Blu-ray Disc that can be read from, but not welcome to, by the user.

CD-R disc

A recordable disc.

DVD-R/DVD+R discs

Recordable DVD's.

BD-R disc

A recordable Blu-ray Disc.

CD-RW disc

A rewritable CD.


Rewritable DVD's.

BD-RE disc.

A renewable Blu-ray Disc.

flash memory

A chip-based storage system that stores data using electrons; used in a variety of storage systems.

Flash Memory Card

A small, rectangular flash memory medium, such as a CompactFlash (CF) or Secure Digital (SD) card; often used with digital cameras and other portable devices.

Remote Storage

A storage device that is not directly connected to the computer being used, such as one accessed through a local network or Internet.

Network Attached Storage

(NAS) A high-performance storage device individually connected to a network to provide storage for computers on that network.

Storage area network (SAN)

A network of hard drives or other storage devices that provide storage for another network of computers.

Online Storage

Remote storage devices accessed via the internet; also called cloud storage.

smart card

A credit card-sized piece of plastic containing a chip and other circuitry that can store data.

Holographic storage

An emerging type of storage technology that uses multiple blue laser beams to store data in three dimensions.

RAID (redundant arrays of independent disks)

A storage method that uses several hard drives working together, typically to increase performance and/or fault-tolerance.

Magnetic tape

Storage medi of plastic tape with a magnetizable surface that stores data as a series of magnetic spots; typically comes as a cartridge.

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