Magnetic‚ Optical OR Flash Memory Advantage Disadvantage Magnetic (internal) hard drive Data storage - Magnetic hard drive w metal hard disks or platters and read/write heads and an access mechanism. Design to store data for desktops and laptops Random magnetic Robust and can be used many years They are not design to be removed and used by itself They have moving parts so they can break more easllySolid-State (internal) drive Data storage device - Hard drives that use flash memory Portable computers
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Magnetic tape is a medium for magnetic recording‚ made of a thin magnetizable coating on a long‚ narrow strip of plastic film. It was developed in Germany‚ based on magnetic wire recording. Devices that record and play back audio and video using magnetic tape are tape recorders and video tape recorders. A device that stores computer data on magnetic tape is a tape drivOver years‚ magnetic tape can suffer from deterioration called sticky-shed syndrome. Caused by absorption of moisture into the binder
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first random access computer memory at the University of Manchester located in the United Kingdom. He used a series of electrostatic cathode-ray tubes for digital storage. A storage of 1024 bits of information was successfully implemented in 1948. Selectron Tube In 1948‚ The Radio Corporation of America (RCA) developed the Selectron tube‚ an early form of computer memory‚ which resembled the Williams-Kilburn design. 1949 Delay Line Memory The delay line memory consists of imparting an information
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materials……………………………11 •MRAM using GMR materials……………………………14 •Competing Non-Volatile Memories…………………17 •MRAM Advantages and Applications……………….18 •Research and Developments…………………………….20 INTRODUCTION In 1984 Drs. Arthur Pohm and Jim Daughton‚ both employed at that time by Honeywell‚ conceived of a new class of magneto resistance memory devices which offered promise for high density‚ random access‚ non volatile memory. In 1989 Dr. Daughton left Honeywell to form Non volatile Electronics‚ Inc. having
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P SoC A Device Study SEMINAR REPORT Submitted in partial fulfillment of the requirement for the award of degree of Bachelor of Technology in ELECTRONICS AND COMMUNICATION ENGINEERING of MAHATMA GANDHI UNIVERSITY By JINJU P.K (65232) Department of Electronics and Communication Engineering Rajagiri School of Engineering and Technology Rajagiri Valley‚ Cochin - 682 039 2010-2011 DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING CERTIFICATE Certified that
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Storage Functions of secondary storage Secondary storage also called auxiliary storage or backing storage is used to store data and instructions when they are not being processed. Secondary storage is much cheaper than primary storage and is also used to back up for later use. Storage media Storage media are the physical hardware on which a computer keeps data‚ instructions and information. E.g. a CD‚ a DVD‚ a floppy disk‚ hard disk. Storage device Storage devices record and retrieve
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in information kiosks. Bar code readers are used to scan bar codes on products. Magnetic strip readers are used to read information encoded on credit cards. OUTPUT Printer for printing forms 6. What are the advantages and disadvantages of flash memory devices over hard disks as storage media? HARD DISK Advantages Large storage capacity Stores and retrieves data much faster than a floppy disk or CD-ROM Data is not lost when you switch off the computer Usually fixed inside the computer so
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as a SSD if purchasing a specific type of HDD. The other type of storage device is SSD’s or “Solid State Drives.” Solid state drives use multiple NAND Flash chips inside of it to hold memory. SSD’s are very compact‚ use no moving parts‚ but are limited by capacity and read/write cycles. SSD’s are commonly used in phones‚ smaller PC’s‚ USB flash drives‚ and small devices such as cameras and TV’s. Please explain the differences between RAM and ROM. Where are RAM chips usually configured? Why are
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Terabyte – approximately 1 trillion bytes. RAM – (Random Access Memory) memory chips that can be read from and written to by the processor and other devices. Is also called main memory Memory Module – a small circuit board that RAM chips usually reside on. Memory Slots – holds memory module. Memory Cache – helps speed the processes of the computer because it stores frequently used instructions and data. Read-only Memory (ROM) – memory chips storing permanent data and instructions firmware‚ contain
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Inside the System Unit • System unit: The main case of a computer • A system unit‚ also known as base unit‚ is the main body of a desktop computer. – Houses the processing hardware for a computer – Also contains memory‚ the power supply‚ cooling fans‚ and interfaces to connect peripheral devices – Houses the drive bays in which storage devices (hard drives‚ DVD drives‚ etc.) are located – With a desktop PC‚ usually looks like a rectangular box Power
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