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DC1-7

Chapter 7 - Storage

DefinitionTerm
Measures the amount of time it takes a processor or storage device to read or locate an item in memory or storage. access time
Smallest unit of disk space that stores data and information. See also cluster. allocation unit
CD that stores photos from an online photo center in jpg file format, usually at a maximum resolution of 7200 pixels per photo. archive disc
Duplicate of a file, program, or disk placed on a separate storage medium that can be used if the original is lost, damaged, or destroyed. backup
High-capacity DVD-recordable format. BD-R
High-capacity rewritable DVD format. BD-RE
Newer, expensive type of DVD with storage capacities of 100 GB, with expectations of exceeding 200 GB in the future. Blu-Ray Disc-ROM (BD-ROM)
Process of writing on an optical disc. burning
Number of bytes a storage medium can hold. capacity
Device that reads and writes data, instructions, and information stored on flash memory cards. card reader/writer
Multisession optical disc on which users can write, but not erase, their own items such as text, graphics, and audio. See also compact disc-recordable. CD-R
Type of optical disc that uses laser technology to store data, instructions, and information that users can read but not write on or erase. See also compact disc read-only memory. CD-ROM
Drive that can read CD-ROM discs and sometimes audio CDs. CD-ROM drive
Erasable multisession optical disc on which users can write data, instructions, and information multiple times. See also compact disc-rewritable. CD-RW
Drive that can read audio CDs, standard CD-ROMs, CD-Rs, CD-RWs, and can write on, or record, CD-RWs. CD-RW drive
Internet service that provides storage to computer users. cloud storage
Smallest unit of disk space that stores data and information. See also allocation unit. cluster
Type of optical disc that uses laser technology to store data, instructions, and information that users can read but not write on or erase. See also CD-ROM. compact disc read-only memory
Multisession optical disc on which users can write, but not erase, their own items such as text, graphics, and audio. See also CD-R. compact disc-recordable
Erasable multisession optical disc on which users can write data, instructions, and information multiple times. See also CD-RW. compact disc-rewritable
Memory card capable of storing between 512 MB and 100 GB of data. CompactFlash (CF)
Device that records images on microfilm and microfiche. computer output microfilm recorder
The vertical section of a hard disk track that passes through all platters. cylinder
Number of bits in an area on a storage medium. density
Extremely high capacity optical disc on which users can read, but not write or erase, that is capable of storing 4.7 GB to 17 GB of data. See also DVD-ROM; digital versatile disc-ROM; digital video disc-ROM; digital video disc read-only memory. digital versatile disc-read-only memory
Extremely high capacity optical disc on which users can read, but not write or erase, that is capable of storing 4.7 GB to 17 GB of data. See also DVD-ROM; digital versatile disc-ROM; digital video disc-ROM. digital video disc-read-only memory
Type of data access in which the storage device can locate a particular data item or file immediately, without having to move consecutively through items stored in front of the desired data item or file. See also random access. direct access
Memory chips on a hard disk that store frequently accessed items such as data, instructions, and information. Sometimes called a buffer. disk cache
Special-purpose chip and electronic circuits that control the transfer of data, instructions, and information between a disk and the system bus and other components in a computer. disk controller
DVD-recordable format with up to 4.7 GB capacity that allows users to write on the disc once and read it many times. DVD+R
Rewritable DVD format with capacities up to 4.7 GB per side. DVD+RAM (DVD+random access memory)
Rewritable DVD format with capacities up to 4.7 GB per side. DVD+RW
DVD-recordable format with up to 4.7 GB capacity that allows users to write on the disc once and read it many times. DVD-R
High-capacity optical disc on which users can read, but not write or erase. See also digital versatile disc-read-only memory and digital video disc-read-only memory. DVD-ROM
Device that can read a DVD-ROM. Most DVD-ROM drives also can read audio CDs, CD-ROMs, CD-Rs, and CD-RWs. DVD-ROM drive
Rewritable DVD format with capacities up to 4.7 GB per side. DVD-RW
Interface that uses parallel signals to transfer data, instructions, and information and can support up to four hard disks at 137 GB per disk. EIDE (Enhanced Integrated Drive Electronics)
Acronym for external SATA; hard disk interface that is much faster than USB and FireWire. eSATA
Removable flash memory device that can be used to add memory, storage, communications, multimedia, and security capabilities to a computer. ExpressCard module
Separate freestanding hard disk that connects with a cable to a USB port or FireWire port on the system unit. external hard disk
Name sometimes given to the hard disk mounted inside a system unit. fixed disk
Term that refers to the size of platters in a hard disk. form factor
Process of dividing a disk into tracks and sectors so that the operating system can store and locate data and information on the disk. formatting
Gigabytes per second. GBps
Type of storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information. See also hard disk drive. hard disk
Type of storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information. See also hard disk. hard disk drive
High-density format that potentially will contain up to 20 layers, each with a capacity of 5 GB. HD VMD (Versatile Multilayer Disc)
Type of hard disk failure that occurs when a read/write head touches the surface of a platter. head crash
Protective case that is used to store optical discs when not in use. jewel box
Kilobytes per second. KBps
Technology used by some optical drives that can etch labels directly on a specially coated optical disc, as opposed to placing an adhesive label on the disc. LightScribe technology
Storage technique in which magnetic particles are aligned horizontally around the surface of the disk. longitudinal recording
Credit card, entertainment card, bank card, or other similar card, with a stripe that contains information identifying you and the card. magnetic stripe card
Megabytes per second. MBps
Removable flash memory device, usually no bigger than 1.5" in height or width, that you insert and remove from a slot in a computer, mobile device, or card reader/writer. memory card
Type of miniature mobile storage medium that is a memory card capable of storing between 1 and 16 GB of data. Memory Stick
Memory card capable of storing between 1 and 16 GB of data. Memory Stick Micro (M2)
A small sheet of film, usually about 4 inches by 6 inches in size, on which microscopic images of documents are stored. microfiche
A roll of film, usually 100 to 215 feet long, on which microscopic images of documents are stored. microfilm
Memory card capable of storing between 1 and 2 GB of data. microSD
Memory card capable of storing between 4 and 16 GB of data. microSDHC
Optical disc with a size of three inches or less used by smaller computers and devices. mini discs
Optical disc that can be written on more than once, allowing users to save additional data on the disc at a later time. multisession
See network attached storage. NAS
Server connected to a network with the sole purpose of providing storage. See also NAS. network attached storage
Type of storage medium that consists of a flat, round, portable disc made of metal, plastic, and lacquer that is written on and read by a laser. optical disc
Storage technique in which magnetic particles are aligned vertically, or perpendicular to the disk's surface, making much greater storage capacities possible. perpendicular recording
Single-session CD-ROM that stores digital versions of film using a jpg file format at a lower resolution, typically 1024 x 1536 pixels. Picture CD
Component of a hard disk that is made of aluminum, glass, or ceramic and is coated with an alloy material that allows items to be recorded magnetically on its surface. platter
Term that refers to smaller external hard disks because they enable users easily to transport photos and other files from one computer to another. pocket hard drive
The capability of a storage medium to be removed from one computer and carried to another computer. portable
Redundant array of independent disks; group of two or more integrated hard disks. RAID
Type of data access in which the storage device can locate a particular data item or file immediately, without having to move consecutively through items stored in front of the desired data item or file. See also direct access. random access
Mechanism in a disk drive that reads items or writes items as it barely touches the disk’s recording surface. read/write head
Process of transferring data, instructions, and information from a storage medium into memory. reading
Hard disk that can be inserted and removed from a drive. removable hard disk
The number of times per minute that a hard disk platter rotates. revolutions per minute (rpm)
Process of copying audio and/or video data from a purchased disc and saving it on digital media. ripping
Newer type of SCSI that uses serial signals to transfer data, instructions, and information. SAS (serial-attached SCSI)
Hard disk interface that uses serial signals to transfer data, instructions, and information and has transfer rates of up to 300 MBps and higher. SATA (Serial Advanced Technology Attachment)
Small computer system interface. SCSI
The physical material on which a computer keeps data, instructions, and information. secondary storage
The small arcs into which tracks on a disk are divided. sectors
Memory card capable of storing between 512 MB and 8 GB of data. Secure Digital (SD)
Memory card capable of storing between 4 and 32 GB of data. Secure Digital High Capacity (SDHC)
Type of data access in which the storage device reads or writes data consecutively. sequential access
Disc on which manufacturers write all items at one time. single-session disc
Card, similar in size to a credit card or ATM card, that stores data on a thin microprocessor embedded in the card. smart card
Storage device that typically uses flash memory to store data, instructions, and information. solid state drive (SSD)
Term used to refer to components that consist entirely of electronic components, such as integrated circuits, and contain no moving parts. solid-state media
Location in which data, instructions, and information are held for future use. storage
Hardware used to record (write and/or read) items to and from storage media. storage device
The physical material on which a computer keeps data, instructions, and information. storage medium
Magnetically coated ribbon of plastic capable of storing large amounts of data and information at a low cost. tape
Small, rectangular, plastic housing for tape. tape cartridge
Device used to read and write data and information on tape. tape drive
Separate cabinet for larger computers in which tape cartridges are mounted. tape library
Flash memory device that plugs in a USB port on a computer or portable device. See also USB flash drive. thumb drive
Narrow recording band that forms a full circle on the surface of a disk. track
The speed at which data, instructions, and information transfer to and from a device. transfer rate
Special type of USB flash drive that includes preinstalled software accessed through a Windows-type interface. U3 smart drive
Universal Media Disc. Mini-DVD used specifically with the PlayStation Portable handheld game console. UMD
Flash memory storage device that plugs in a USB port on a computer or portable device. See also thumb drive. USB flash drive
Process of transferring data, instructions, and information from memory to a storage medium. writing
Memory card capable of storing between 256 MB and 2 GB of data. xD Picture Card
Created by: sheidkamp