Secondary storage (optical) Table of contents Why was secondary storage needed? 1 Different types of optical discs: 1 1‚ CD (compact disc): 1 2‚ DVD (digital versatile storage) 2 3‚ Blu-Ray Disc (BD): 3 Which type of recordable disc should I choose: 3 Understanding the difference between the Live File System and Mastered disc formats: 3 Discs formatted with the Live File System option: 3 Discs formatted with the Mastered option: 4 Questions from students: 4 References: 5
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The need for more storage is growing. The amount of data produced is doubling in every two years. (in 2010 – 1.8 zettabytes) The cost of creating‚ managing and storing the data is decreasing‚ but can the optical storage expand further? The current Blu-ray lasers emit light in the blue part of the electromagnetic spectrum (about 420 nanometer wavelength). There are ongoing researches using UV light‚ that would probably have to be 200 nm and would provide storage capacities of over 100 GB in a single
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one logical disk but all the data is distributed among two physical disks. If one disk fails operation cannot continue and data is lost because it is only stored in one place. RAID 1 uses two disks that are mirrored copies of each other. If one disk fails‚ operation can continue and no data is lost. 3. Explain the process of data recovery in case of a drive failure in RAID 5. 4. What are the benefits of using RAID 3 in a backup application? 5. Discuss the impact of random and sequential I/O
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Photography o Photographers working in the age of computers have come to rely on computers not only to preserve their artwork but to create digital portfolios to send to clients‚ correct mistakes in their photos like overexposure and post their work on the web to attract potential clients and buyers. Additionally‚ these photographers can upload photos from their digital cameras directly onto their computers‚ allowing them to specialize almost entirely in digital photography. o Where once the pencil
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The importance of staying awake during a period of instruction is so that consequences can be avoided when mistakes are made for not knowing what to do. Following instructions and paying attention when receiving orders are important skills to have in school or in any career. Being able to follow instructions when it comes to classes and school-type environments insures that the student will be able to pull off a higher score. Knowing how to comprehend and carry out the teacher‘s or instructor‘s directions
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define at least five different types of storage devices from the most reliable to the least reliable. Include in your search cost and availability of the storage devices. Include names of vendors for these storage devices. There are three main types of consumer-grade computer storage: internal‚ external‚ and network attached. Internal storage is generally a hard drive or solid-state drive (SSD) that hosts computer’s operating systems and programs. External storage comes mostly in the form of external
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Use of Computers in Everyday Life: Undoubtedly we can say that modern world will be incomplete without computers and their applications. Undoubtedly we can say that modern world will be incomplete without computers and their applications. It has become so common in our daily lives that it is almost impossible to imagine life without the use of computers. We get all the modern facilities; thanks to the invention of Computers! Right from watching movies‚ listening to music‚ playing games
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BENEFITS AND RISK OF THE USE OF NEW TECHNOLOGIES‚ IN PARTICULAR‚ THE COMPUTERS Nowadays interaction with computers has become an integral part of daily routine for millions of people. Whatever career you choose to follow‚ you will probably be a frequent user of computers. IT (Information Technology) has become progressively more important in our society and many jobs are changing. There are some benefits and some risks associated to news technologies‚ in particular‚ the computers. A good example
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The use of Computer technology in Entertainment. “The improvements in computer technology over the past decade have made video and audio streaming commonplace‚ making the computer a sophisticated and powerful entertainment medium” (Haupert‚ 2012‚ p.39). The use of computer technology is not limited to business‚ health‚ education and manufacturing industries but also widely used in entertainment and arts world. There are so many applications as there are entertainers and artists. People look forward
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Consistency in Dr. Tom Stockmann In Arthur Miller’s adaptation of Henrik Ibsen’s play An Enemy of the People‚ Dr. Stockmann is first introduced as an intelligent doctor and scientist who appears to live in constant high spirits. Miller describes him as “the eternal amateur- a lover of things‚ of people‚ of sheer living‚ a man for whom the days are too short‚ and the future fabulous with discoverable joys” (Miller‚ 6). Upon receiving his results from the university regarding the condition of the
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