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    Storage Devices

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    Assume you can choose among magnetic tapes, magnetic hard disks, recordable optical discs (CD-R: write once, read many), and flash memory
    USB drives. Consider each scenario independently of the others. For each of the following purposes, explain which one of the media you would choose and why. Start by saying which medium you have chosen. Then explain why.

    a)You need to store thousands of employee records for several years. This is only a back-up procedure. The information will never be processed from the back-up medium.

    b)The storage medium is used as a part of an airline reservation system.

    c)Your business sells machines that must be maintained well by your clients. You wish to provide them with a digital version of the maintenance manual. The manual includes an index (like one at the end of a book) with links to the proper pages.

    d)You are a sales manager who travels often. You must store a large PowerPoint presentation that you show to prospective customers in their office. You do not carry a laptop computer, but there is a PC wherever you go. You do not want to carry CDs, because you found that the graphic-rich presentation moves to slowly from CDs.

    e)You have a business on the Web. You maintain your own server and site. You provide much textual and graphical information from the site. Customers can search products and make purchases.

    f)You want to store all the paintings of
    impressionist painters for use by your local
    library patrons. Patrons can search by artist
    name, artist nationality, or by the painting's
    topic. The library would like multiple copies
    of what you store, and to be able to loan
    them to patrons for viewing at home.

    g)You use the medium for a large database that
    your employees manipulate frequently.

    h)You work for the IRS, and you need to
    archive the tax records of millions of taxpayers
    for several years. The archiving is done
    after all processing of tax filings are complete
    and after all refunds and payments
    have been made. IRS employees must occasionally
    go back and retrieve specific records
    from these files, and when they need a record, they want to access it directly.

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    Solution Preview

    a) Answer: For this scenario, I'll choose magnetic tapes as storage media. This is because the data will just be used as a backup and must be preserved for a very long time. And since the backup data will not be processed on normal operations, data speed of magnetic tapes will not be an issue.

    b) Answer: For this scenario, I'll choose magnetic hard disks. It is because the reservation system will always be processed on the operations of the airline company and also large amount of data will be processed. So hard disks fit the ...

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