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Storage holds data, instructions, and information for future use. A storage medium (media is the plural), also called secondary storage, is the physical material on which a computer keeps data, instructions, and information. Examples are on the image below :
HARD DISKA hard disk is a storage device that contains one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information.
RAIDA group of two or more integrated hard disks is called a RAID
(redundant array of independent disks). RAID is an ideal storage solution for users who must have the data available when they attempt to access it.
NASA network attached storage (NAS) device is a server connected to a network with the sole p urpose of providing storage. Any user or device connected to the network can access files on the NAS device.
EXTERNAL AND REMOVABLE HARD DISKSAn 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. As with the internal hard disk, the entire hard disk is enclosed in an airtight, sealed case. A removable hard disk is a hard disk that you insert and remove from a drive.
External and removable hard disks offer the following advantages over internal hard disks (fixed disks): MINIATURE HARD DISKSThese tiny hard disks have form factors of 1.8 inch, 1 inch, and 0.85 inch. External hard disks that are smaller in size and capacity, which also contain miniature hard disks, are sometimes called a pocket hard drive because they enable mobile users easily to transport photos and other files from one computer to another HARD DISK CONTROLLERSA 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 in the computer. FLASH MEMORY STORAGEFlash memory is a type of nonvolatile memory that can be erased electronically and rewritten. Flash memory chips are a type of solid state media, which means they consist entirely of electronic components, such as integrated circuits, and contain no moving parts SOLID STATE DRIVESA solid state drive (SSD) is a storage device that
typically uses flash memory to store data, instructions, and information.
MEMORY CARDSMemory cards enable mobile users easily to transport digital photos, music, or files to and from mobile devices and computers or other devices.
USB FLASH DRIVESA USB flash drive, sometimes called a thumb drive, is a flash memory storage device that plugs in a USB port on a computer or mobile device
EXPRESS CARD MODULESAn 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 (Figure 6-16). ExpressCard modules can be used to add memory, storage, communications, multimedia, and security capabilities to a computer.
CLOUD STORAGECloud storage is an Internet service that provides hard disk storage to computer users.
OPTICAL DISCSAn optical disc is a type of optical storage media that consists of a flat, round, portable disc made of metal, plastic, and lacquer.
CDsA CD-ROM, or compact disc read-only memory, is a type of o ptical disc that users can read but not write (record) or erase — hence, the name read-only. ARCHIVE DISCS AND PICTURES CDsMany people use archive discs or Picture CDs to preserve their photos. When you post and share photos online on a photo sharing community, you can choose to save your collection of online photos on an archive disc, which stores photos in the
jpg file format. DVDs and BLU-RAY DISCSAlthough the size and shape of a CD and DVD are similar, a DVD stores data, instructions, and information in a slightly different manner and thus achieves a higher storage capacity. DVD quality also far surpasses that of CDs because images are stored at higher resolution. Blu-ray, which is a higher capacity and better quality than standard DVDs, especially for high-definition audio and video. A Blu-ray Disc (BD) has storage capacities of 100 GB, with expectations of exceeding 200 GB in the future. OTHER TYPES OF STORAGETAPETape is a magnetically coated ribbon of plastic capable of storing large amounts of data and information at a low cost.
MAGNETIC STRIPE CARDSA magnetic stripe card is a credit card, entertainment card, bank card, or other similar card, with a stripe that contains i nformation identifying you and the card.
SMART CARDSA smart card, which is similar in size to a credit card or ATM card, stores data on a thin microprocessor embedded in the card.
MICROFILM AND MICROFICHEMicrofilm and microfiche store microscopic images of documents on roll or sheet film. Microfilm is a 100- to 215-foot roll of film. Microfiche is a small sheet of film, usually about 4 3 6 inches
ENTERPRISE STORAGEA large business, commonly referred to as an enterprise, has hundreds or thousands of employees in offices across the country or around the world. Enterprises use computers and computer networks to manage and store huge volumes of data and information about customers, suppliers, and employees. SUMMARYStorage holds data, instructions, and i nformation, which includes pictures, music, and videos, for future use. Users depend on storage devices to provide access to their storage media for years and decades to come. This chapter identified and discussed various storage media and storage devices. Storage media covered included internal hard disks; external and removable hard disks; solid state drives; memory cards; USB flash drives; ExpressCard modules; cloud storage; CDs, DVDs, and Blu-ray Discs; tape; smart cards; and microfilm and microfiche. What type of storage device uses flash memory to store data for backup or transfers between PCS?USB flash drives are small, portable storage devices that use a USB interface to connect to a computer. Like flash memory cards, they are removable and rewritable, and have become a common method of storing data.
What type of storage device is a flash memory card?A flash memory card (sometimes called a storage card) is a small storage device that uses nonvolatile semiconductor memory to store data on portable or remote computing devices. Such data includes text, pictures, audio and video.
Which device on a personal computer stores data instructions and information temporarily while the computer is on?RAM, which stands for random access memory, and ROM, which stands for read-only memory, are both present in your computer. RAM is volatile memory that temporarily stores the files you are working on.
Which device used to store data and information?A hard disk drive or solid state drive holds all of the data; files, photos, programs, music, and movies, that the user wants to keep. Removable, external media storage devices such as flash drives and read/writeable CDs and DVDs are also secondary storage.
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