Jason Huang

Operating system (OS) is a compulsory course in the second semester of an NTUCSIE student’s sophomore year. In this course, I’ve taken several notes according to the textbook Operating System Concepts - 10th edition and the slides of professor Chung-Wei Lin and Chi-Sheng Shih. [Read More]

In this chapter, we discuss how mass storage—the nonvolatile storage sys- tem of a computer—is structured. The main mass-storage system in modern computers is secondary storage, which is usually provided by hard disk drives (HDD) and nonvolatile memory (NVM) devices. Some systems also have slower, larger, tertiary storage, generally consisting... [Read More]

CPU scheduling is the basis of multiprogrammed operating systems. By switch- ing the CPU among processes, the operating system can make the computer more productive. In this chapter, we introduce basic CPU-scheduling concepts and present several CPU-scheduling algorithms, including real-time systems. We also consider the problem of selecting an algorithm... [Read More]

For most users, the file system is the most visible aspect of a general-purpose operating system. It provides the mechanism for on-line storage of and access to both data and programs of the operating system and all the users of the computer system. The file system consists of two distinct... [Read More]

As we saw in Chapter 13, the file system provides the mechanism for on- line storage and access to file contents, including data and programs. File systems usually reside permanently on secondary storage, which is designed to hold a large amount of data. This chapter is primarily concerned with issues... [Read More]