ch. 6 Definitions (part 2)

BACKUP: is a duplicate of a file, program, or disk placed on a separate storage medium that you can use in case the original is lost, damaged, or destroyed.

RAID: (Redundant Array of Independent Disks) a group of two or more integrated hard disks

NAS: (Network Attached Storage) is a server connected to a network with the sole purpose of providing storage

EXTERNAL HARD DISK: is a separate freestanding hard disk that connects with a cable to a USB port or FireWire port on the system unit or communicates wirelessly.

REMOVABLE HARD DISK: is a hard disk that you insert and remove from a drive.

POCKET HARD DRIVE: external hard disks that are smaller in size and capacity, which also contain miniature hard disks.

DISK CONTROLLER: consists of a special-purpose chip and electronic circuits that control the transfer of data, instruction, and information from a disk to and from the system bus and other components in the computer.
          SATA: (Serial Advanced Technology Attachment) uses serial signals to transfer data, instructions, and information. The primary advantage of SATA interfaces is their cables are thinner, longer, more flexible, and less susceptible to interference than cables used by hard disks that use parallel signals.
          EIDE: (Enhanced Integrated Drive Electronics) is a hard disk interface that uses parallel signals to transfer data, instructions, and information. EIDE interfaces can support up to four hard disks at 137 GB per disk and also provides connections for optical disc drives and tape drives.
          SCSI: interfaces, which also use parallel signals, can support up to eight or fifteen peripheral devices. Supported devices include hard disks, optical disc drives, tape drives, printers, scanners, network cards, and much more.
          SAS: (Serial-Attached SCSI) is a newer type os SCSI that uses serial signals to transfer data, instructions, and information. Advantages of SAS over parallel SCSI include thinner, longer cables; reduced interferences; less expensive; support for many more connected devices at one; and faster speeds.

SOLID STATE MEDIA: consist entirely of electronic components such as integrated circuits and contain no moving parts. Types of flash memory include solid state drives, memory cards, USB flash drives, and ExpressCard modules.

SOLID STAT DRIVE (SSD): is a storage device that typically uses flash memory to store data, instructions, and information. With available sizes of 3.5 inches, 2.5 inches, and 1.8 inches, SSDs are used in all types of computers and devices such as portable media players and digital video cameras.

MEMORY CARD: is a removable flash memory device, usually no bigger that 1.5 inches in height or width, that you insert and remove from a slot in a computer, mobile device, or card reader/writer. Common types include CompactFlash (CF), Secure Digital (SD), Secure Digital High Capacity (SDHC), microSD, microSDHC, xD Picture Card, Memory Stick, and Memory Stick Micro (M2).

CARD READER/WRITER: a device that reads and writes data, instructions, and information stored on memory cards.

EXPRESSCARD MODULE: is a removable device, about 75 mm long and 34 mm wide or l-shaped with a width of 54 mm, that fits in an ExpressCard slot.

CLOUD STORAGE: is an Internet service that provides hard disk storage to computer users.

OPTICAL DISC: is a type of optical storage media that consists of a flat, round, portable disc make of metal, plastic, and lacquer. Optical discs primarily store software, data, digital photos, movies, and music.

LIGHTSCRIBE TECHNOLOGY: works with specially coated optical discs, to etch labels directly on the disc.

CD-ROM: or compact disc read only memory, is a type of optical disc that users can read but not write (record) or erase.
           CD-ROM DRIVE: or a CD-ROM player

CD-R (compact disc-recordable): is a multisession optical disc on which users can write but not erase, their own items such as text, graphics, and audio.

BURNING: the process of users being able to record, or write, their own data on a  disc with a CD-R or CD-RW drive.

CD-RW (compact disc-rewritable): is an erasable  multisession disc you can wrtie on multiple times.

RIPPING: the process of copying audio and.or video ata from a purchased disc and saving it on digital media.

ARCHIVE DISC: stores photos in the jpg file format

PICTURE CD: stores digital versions of film using jpg file format

DVD-ROM: (digital versatile disc-read- only memory or digital video disc-read-only memory) is a high-capacity optical disc on which users can read but not write or erase.

HD VMD: (versatile multilayer disc) another high density format potentially will contain up to 20 layers, each with a capacity of 5GB.

UMD: (universal media disc) can store up to 1.8 GB of games, movies, or music.

TAPE: is a magnetically coated ribbon of plastic capable of storing large amounts of data and information at a low cost.

TAPE DRIVE: reads and writes data and information on a tape.

MAGNETIC STRIPE CARD: is a credit card, entertainment card, bank card, or other similar card, with a stripe that contains information identifying you and the card.

SMART CARD: stores data on a thin microprocessor embedded in the card. Smart cards contain a processor and have input, process, output and storage capabilities.

MICROFILM: is a 100-to-215-foot roll of film

MICROFICHE: is a small sheet of film, usually about 4x6 inches.

Ch. 6 Definitions (part 1)

STORAGE MEDIUM: also called SECONDARY STORAGE, is the physical material on which a computer keeps data, instructions, and information.

CAPACITY: is the number of bytes (characters) a storage medium can hold.

STORAGE DEVICE: is the computer hardware that records and/or retrieves items to and from storage media.

READING: is the process of transferring these items from a storage medium into memory.

ACCESS TIME: measures the amount of time it takes a storage device to locate an ite, on a storage medium.

HARD DISK: is a storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information.

LONGITUDINAL RECORDING: aligned the magnetic particles horizontally around the surface of the disk.

PERPENDICULAR RECORDING: align the magnetic particles vertically, or perpendicular to the disk's surface, making much greater storage capacities possible.

Cold and tired :/