List and briefly explain five storage management responsibilities of a typical os

The five major responsibilities of storage management of OS are  
1. Process isolation: OS should be able to secure the individual nature of the memory by not letting it interfere with other memory. 
2. Automatic allocation and management: Memory allocation should be done automatically based on the hierarchy and the allocation should be transparent and visible to the owner. 
3. Modular Programming Support: Through the memory the module of the program and application must be defined by programmers. 
4. Protection and access control: This one refers to the allotment and sharing of the memory at all level of hierarchy and making the program able to use the memory of the other program. 
5. Long-term storage: This is the basic need of many programs developed by the programmers.