SECONDARY STORAGE MANAGEMENT:
The main purpose of a computer system is to execute program. These programs with the data day access must be in main memory or primary storage during execution. Because main memory is too small to accommodate all data and programs and because the data that it holds are last when power is last the computer system must provide secondary storage to back up main memory most modern computer system use disk as the principle online storage medium for both programs and data.
The operating system is responsible for the following activities in connection with disk management.
* Free space management.
* Storage allocation.
* disk scheduling.
Because secondary storage is used frequently. It must be used in efficiently.