Dale - Computer Science Illuminated 377

Dale Computer - 350 Chapter 11 File Systems and Directories Goals After studying this chapter you should be able to I I I I I I I I I I describe

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File A named collec- tion of data, used for organizing secondary memory File system The oper- ating system’s logical view of the files it manages Directory A named group of files 350 Chapter 11 File Systems and Directories Goals After studying this chapter, you should be able to: ± describe the purpose of files, file systems, and directories. ± distinguish between text and binary files. ± identify various file types by their extensions. ± explain how file types improve file usage. ± define the basic operations on a file. ± compare and contrast sequential and direct file access. ± discuss the issues related to file protection. ± describe a directory tree. ± create absolute and relative paths for a directory tree. ± describe several disk-scheduling algorithms. 11.1 File Systems In Chapter 5 we established the differences between main and secondary memory. Recall that main memory is where active programs and data are held while in use. Main memory is volatile, meaning that the information stored on it is lost if electric power is turned off. Secondary memory is nonvolatile—the
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This note was uploaded on 01/13/2011 for the course CSE 1550 taught by Professor Marianakant during the Fall '10 term at York University.

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