The format is designed to store various types of

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Unformatted text preview: ve Electronics (IDE), Enhanced Small Device Interface (ESDI), Intelligent Peripheral Interface-level 3 (IPI-3) and' Small Computer System Interface (SCSI). 27. Data backup is the process of creating a copy of the data from storage backup device so that if by accident the data on the on-line it can be retrieved from the backup device and stored back on the on-line storage device to a secondary storage device gets corrupted or gets lost, line storage device. 28. The two basic types of backup are - full backup an incremental backup. In full backup, all the data on the online secondary storage device is copied on the backup device at the time of backup, whereas in incremental backup only the newly created files or files that have been changed since the last backup are copied. 29. To make applications execute faster, in some computer systems a block of semiconductor RAM chips (other than the RAM chips used for the main memory) is used as a simulated disk. These RAM chips are often referred to as a RAM disk, or a silicon disk, or a pseudo disk. 30. DVD (Digital Versitile Disk) is a standard format for the distribution and interchange of digital content in both computer-based and consumer electronic products. The format is designed to store various types of large multimedia data on a new and improved version of the CD which works on optical disk technology. 31. As a single type of storage is not superior in speed of access, capacity and cost, most computer systems make use of a hierarchy of storage technologies known as storage hierarchy. A typical storage hierarchy pyramid includes cache memory, main memory, secondary storage and mass storage. Questions 1. What is a secondary storage? How does it differ from a primary storage? 2. What are the main limitations of the primary storage of a computer system? 3. Why is secondary storage used in most computer systems? 4. Name some of the popular secondary storage devices used in today's computer systems. 5. Give the broad classification of the popular secondary storage devices used in today's computer systems. 6. What is a sequential-...
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