Operating System Fundamentals
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best answers from c, Lesson 2 C# Windows Forms
| Unit 6: File Systems Managing File Systems We have already taken a detailed look at the structure of atypical operating system, as well as how an operating system manages all of a computers hardware resources, RAM and the scheduling of all of the processes and threads that need to be executed. In this unit, we will examine the last key element of a users experience with a computer system. File system management encompasses the provision of away to store your data in a computer, as well as away for you to find and access that data when you need it. We will begin this unit by looking at the requirements in a computer system in order to provide long-term storage of information. We will also look at an operating systems File Manager and all of its responsibilities. This will be followed by an examination of common strategies used by the File Manager to store and retrieve information from storage media. From there, we will turn our attention to the file systems that are created when an operating system formats a storage device (such as a hard disk. This will include a comparison of the characteristics of the FAT and NTFS file systems, as well the purposes of the Master Boot Record and Partition Tables created on a hard disk during formatting. We will conclude this unit with a look at how users actually interact with a file system. This will include an examination of the purposes of directories or folders, and the navigation of hierarchical file structures. Long-Term Storage of Information When we examined computer memory, we saw that RAM is only useful for the temporary storage of data and instructions that are currently being used by a computer. Although RAM is very fast, it is volatile memory. That is, when you turnoff the power to the computer, all data stored in RAM is lost. In addition, atypical computer has a relatively small amount of RAM compared to a users long-term data storage needs. In order to permanently store information, an operating system has several requirements A storage device (typically a magnetic hard disk. A device controller and device driver for the storage disk. Strategies for reading and writing data to a disk. A file system that provides a structure and rules for file encoding, management and security. Although long-term data storage can be achieved using a variety of media (ranging from optical discs to floppy disks and USB Flash drives, this unit will focus on magnetic hard disks. That is because every personal computer system relies upon hard disk storage, and hard disks are by far the most common long-term data storage media. Download 2.34 Mb. Share with your friends:
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