TAILIEUCHUNG - Lecture Operating system concepts - Module 14

After studying this chapter, you should be able to: Discuss basic concepts related to concurrency, such as race conditions, OS concerns, and mutual exclusion requirements; understand hardware approaches to supporting mutual exclusion; define and explain semaphores; define and explain monitors. | Module 14: Tertiary-Storage Structure Tertiary Storage Devices Operating System Issues Performance Issues Operating System Concepts Tertiary Storage Devices Low cost is the defining characteristic of tertiary storage. Generally, tertiary storage is built using removable media Common examples of removable media are floppy disks and CD-ROMs; other types are available. Operating System Concepts Removable Disks Floppy disk — thin flexible disk coated with magnetic material, enclosed in a protective plastic case. Most floppies hold about 1 MB; similar technology is used for removable disks that hold more than 1 GB. Removable magnetic disks can be nearly as fast as hard disks, but they are at a greater risk of damage from exposure. Operating System Concepts Removable Disks (Cont.) A magneto-optic disk records data on a rigid platter coated with magnetic material. Laser heat is used to amplify a large, weak magnetic field to record a bit. Laser light is also used to read data (Kerr effect).

• Hệ điều hành
• Operating system concepts
• Lecture Operating system concepts
• Operating system
• Computer system organization
• Operating system structure
• Operating system services
• Operating system structures
• Operating system design
• Hệ điều hành
• Operating System Debugging
• Operating System Generation
• Types of System Calls
• Computer system structures
• File system interface
• File system implementation
• Computer system architecture
• The Linux system