1. CS1252-OPERATING SYSTEM UNIT V1 Layered File System

2. CS1252-OPERATING SYSTEM UNIT V2 A Typical File Control Block

3. CS1252-OPERATING SYSTEM UNIT V3 In-Memory File System Structures

4. CS1252-OPERATING SYSTEM UNIT V4 Schematic View of Virtual File System

5. CS1252-OPERATING SYSTEM UNIT V5 Contiguous Allocation of Disk Space

6. CS1252-OPERATING SYSTEM UNIT V6 File-Allocation Table

7. CS1252-OPERATING SYSTEM UNIT V7 Example of Indexed Allocation

8. CS1252-OPERATING SYSTEM UNIT V8 Indexed Allocation – Mapping (Cont.)  outer-index index table file

9. CS1252-OPERATING SYSTEM UNIT V9 Combined Scheme: UNIX (4K bytes per block)

10. CS1252-OPERATING SYSTEM UNIT V10 Linked Free Space List on Disk

11. CS1252-OPERATING SYSTEM UNIT V11 FCFS Illustration shows total head movement of 640 cylinders.

12. CS1252-OPERATING SYSTEM UNIT V12 SSTF (Cont.)

13. CS1252-OPERATING SYSTEM UNIT V13 SCAN (Cont.)

14. CS1252-OPERATING SYSTEM UNIT V14 C-SCAN (Cont.)

15. CS1252-OPERATING SYSTEM UNIT V15 4.3 BSD Text-Segment Swap Map

16. CS1252-OPERATING SYSTEM UNIT V16 4.3 BSD Data-Segment Swap Map