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Storage Medium

secondary storage, the physical material on which a computer keeps data, instructions, and info

Capacity

the number of bytes a storage medium can hold

storage device

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

Reading

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 item on a storage medium

Hard Disk

a Storage Device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and info

longitudinal recording

traditional storing, aligned the magnetic particles horizontally around the surface of the disk.

perpendicular recording

hard disks align the magnetic particles vertically , or perpendicular to the disks surface, making greater storage capacities possible

RAID

redundant array of independent disks, a group of two or more integrated hard disks

NAS

network attached storage, a server connected to a network with the sole purpose of providing storage

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

SSD

solid state drive, a storage device that typically uses flash memory to store data, instructions, and info

Cloud storage

an internet service taht provides hard disk storage to computer users

LightScribe technology

work with specially coated optical disks, to etch labels directly on the disc

optical disc

consists of a flat, round, portable, disc made of metal, plastic, and lacquer

magnetic stripe card

credit card, bank card...

smart card

stores data on a thin microprocessor embedded in the card, ATM

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