CS1252-OPERATING SYSTEM UNIT V1 Layered File System.

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Presentation transcript:

CS1252-OPERATING SYSTEM UNIT V1 Layered File System

CS1252-OPERATING SYSTEM UNIT V2 A Typical File Control Block

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

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

CS1252-OPERATING SYSTEM UNIT V5 Contiguous Allocation of Disk Space

CS1252-OPERATING SYSTEM UNIT V6 File-Allocation Table

CS1252-OPERATING SYSTEM UNIT V7 Example of Indexed Allocation

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

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

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

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

CS1252-OPERATING SYSTEM UNIT V12 SSTF (Cont.)

CS1252-OPERATING SYSTEM UNIT V13 SCAN (Cont.)

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

CS1252-OPERATING SYSTEM UNIT V BSD Text-Segment Swap Map

CS1252-OPERATING SYSTEM UNIT V BSD Data-Segment Swap Map

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