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Sarabjit Kumar, Lovely Professional University Unit 7: Secondary Storage Structure

Unit 7: Secondary Storage Structure Notes

CONTENTS
Objectives

Introduction
7.1 The Benefits of Secondary Storage
7.2 Disk Structure
7.3 Disk Scheduling
7.3.1 Shortest Seek Time First (SSTF)
7.3.2 Scan
7.3.3 Cscan

7.4 Selecting a Disk Scheduling Algorithm
7.4.1 Scheduling Fixed-head Devices
7.5 Disk Management
7.5.1 Disk Formatting
7.5.2 Boot Block
7.5.3 Bad Blocks
7.6 Swap Space Management
7.6.1 Pseudo-Swap Space
7.6.2 Physical Swap Space
7.6.3 Swap Space Parameters
7.6.4 Swap Space Global Variables
7.6.5 Swap Space Values
7.6.6 How Swap Space is Prioritized
7.6.7 Three Rules of Swap Space Allocation
7.7 Overview of RAID Structure
7.7.1 Improvement of Reliability via Redundancy

7.7.2 Improvement in Performance via Parallelism
7.8 RAID Levels
7.8.1 Selecting a RAID Level
7.8.2 Extensions
7.9 Summary
7.10 Keywords
7.11 Review Questions
7.12 Further Readings

LOVELY PROFESSIONAL UNIVERSITY 237