Spin-stand Microscopy of Hard Disk Data -  Isaak D. Mayergoyz,  Chun Tse

Spin-stand Microscopy of Hard Disk Data (eBook)

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2010 | 1. Auflage
218 Seiten
Elsevier Science (Verlag)
978-0-08-046752-8 (ISBN)
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This book provides an in-depth exposition of spin-stand microscopy of hard disk data which is a new technique recently developed and extensively tested by the authors of the book. Spin-stand microscopy is the first magnetic imaging technique where imaging is performed ex-situ on a rotating disk mounted on a spin-stand. This technique is one of the fastest scanning-based microscopy techniques. It is non-invasive and has nano-scale resolution. For these reasons, it provides unique capabilities for the visualization of magnetization patterns recorded on hard disks. This book is self-contained and it covers in sufficient details the basic facts of magnetic data storage technology, the principles and theory of spin-stand microscopy, its experimental implementations, as well as its applications in hard disk diagnostics, imaging of overwritten patterns, computer forensics of hard disk files, and data-dependent magnetic thermal relaxations of recorded magnetization patterns. This book will be a valuable reference for the magnetic data storage community, magnetic microscopy professionals as well as engineers and scientists involved in computer data forensics, commercial data recovery, and the design of archival data storage systems.
Key features:
- conceptual novelty of the technique and the demonstration of its wide scope of applications
- detailed exposition of the principles of spin-stand magnetic microscopy
- comprehensive discussions of novel image reconstruction techniques
- demonstration of high resolution spin-stand images of hard disk data
- presentation of sector-by-sector ex-situ forensics of hard disk files
- extensive studies of data-dependent thermal relaxations of magnetization patterns recorded on hard disks

Key features:
- conceptual novelty of the technique and the demonstration of its wide scope of applications
- detailed exposition of the principles of spin-stand magnetic microscopy
- comprehensive discussions of novel image reconstruction techniques
- demonstration of high resolution spin-stand images of hard disk data
- presentation of sector-by-sector ex-situ forensics of hard disk files
- extensive studies of data-dependent thermal relaxations of magnetization patterns recorded on hard disks
This book provides an in-depth exposition of spin-stand microscopy of hard disk data which is a new technique recently developed and extensively tested by the authors of the book. Spin-stand microscopy is the first magnetic imaging technique where imaging is performed ex-situ on a rotating disk mounted on a spin-stand. This technique is one of the fastest scanning-based microscopy techniques. It is non-invasive and has nano-scale resolution. For these reasons, it provides unique capabilities for the visualization of magnetization patterns recorded on hard disks. This book is self-contained and it covers in sufficient details the basic facts of magnetic data storage technology, the principles and theory of spin-stand microscopy, its experimental implementations, as well as its applications in hard disk diagnostics, imaging of overwritten patterns, computer forensics of hard disk files, and data-dependent magnetic thermal relaxations of recorded magnetization patterns. This book will be a valuable reference for the magnetic data storage community, magnetic microscopy professionals as well as engineers and scientists involved in computer data forensics, commercial data recovery, and the design of archival data storage systems. - Conceptual novelty of the technique and the demonstration of its wide scope of applications- Detailed exposition of the principles of spin-stand magnetic microscopy- Comprehensive discussions of novel image reconstruction techniques- Demonstration of high resolution spin-stand images of hard disk data- Presentation of sector-by-sector ex-situ forensics of hard disk files- Extensive studies of data-dependent thermal relaxations of magnetization patterns recorded on hard disks

Front cover 1
Spin-Stand Microscopy of Hard Disk Data 4
Copyright page 5
Contents 6
Preface 10
Part I. Spin-Stand Microscopy: Theory 14
Chapter 1. Introduction 16
1.1 Technological Evolution of Hard Disk Drives 16
1.2 Survey of Selected Magnetic Microscopy Techniques 19
1.3 Spin-Stand Microscopy 22
Bibliography 23
Chapter 2. Scanning Mechanism of the Spin-Stand Microscopy Technique 28
2.1 Overview of Spin-Stand System Components 28
2.2 Scanning and Triggering Mechanisms of Spin-Stand Microscopy 33
2.3 Advantages of Spin-Stand Microscopy Due to Its Scanning Mechanism 35
2.4 Advantages of Spin-Stand Microscopy Due to Its Sensing Mechanism 35
2.5 Summary 37
Bibliography 37
Chapter 3. Magnetization Image Reconstruction 38
3.1 The Necessity of Image Reconstruction 38
3.2 Theoretical Formulation of the Image Reconstruction Algorithm 39
3.3 Reconstructed Images of Overwritten Data 45
3.4 Summary 47
Bibliography 51
Chapter 4. Extraction and Scaling of the Head Response Function 54
4.1 Extraction of the Head Response Function 54
4.2 Scaling of the Head Response Function 58
4.3 Experiments and Results 60
4.4 Summary 64
Bibliography 66
Chapter 5. Intersymbol Interference Removal 68
5.1 The Necessity of Intersymbol Interference Removal 68
5.2 ISI Removal Algorithm 69
5.3 Experiments and Results 72
5.4 Another Method for Obtaining the Head Response Function 82
5.5 ISI-Removal Using Hilbert Transform 86
5.6 The 2D Hilbert Transform in Magnetic Recording 90
5.7 Summary 97
Bibliography 98
Part II. Spin-Stand Microscopy: Applications 100
Chapter 6. High-Speed Ex-Situ Spin-Stand Microscopy of Hard Disk Data 102
6.1 The Need for High-Speed Data Microscopy 102
6.2 Eccentricity Problem 104
6.3 Triggering and Aligning 131
6.4 Sample Hard Disk Images 133
6.5 Summary 138
Bibliography 139
Chapter 7. Spin-Stand Based Forensic Studies of Hard Disk Data 140
7.1 Introduction 140
7.2 Procedures for Spin-Stand Based Forensic Studies of Hard Disk Data 141
7.3 Demonstration of Spin-Stand Based Forensic Studies of Hard Disk Data 147
7.4 Selective Data Retrieval 155
7.5 Summary 156
Bibliography 156
Chapter 8. Spin-Stand Microscopy of Transverse Magnetization 158
8.1 Vectorial Images of Magnetization 158
8.2 Experimental Results 164
8.3 Summary 168
Bibliography 170
Chapter 9. Spin-Stand Study of Data-Dependent Thermal Relaxations 172
9.1 Significance of Thermal Relaxations 172
9.2 Intrinsic Magnetic Thermal Relaxations 173
9.3 Experimental Study of Data-Dependent Thermal Relaxations 182
9.4 Results and Discussion 186
9.5 Spatial and Vectorial Characterization of Thermal Relaxations 189
9.6 Summary 194
Bibliography 196
Appendix A. Overview of Hard Disk Drive Components and Technology 198
A.1 Channel 198
A.2 Media 201
A.3 Heads 203
A.4 Motion Control System 209
Bibliography 212
Appendix B. Implementation of ISI-Removal Algorithm 214
B.1 Noise Reduction by Using the Arctangent Function 214
B.2 Scaling of the Head Response Function 215
B.3 Flow Charts of the ISI-Removal Algorithm 220
Appendix C. Aligning Algorithm 224
C.1 Flow Chart of the Aligning Algorithm 225
Subject Index 228

Erscheint lt. Verlag 7.7.2010
Sprache englisch
Themenwelt Mathematik / Informatik Informatik Datenbanken
Informatik Theorie / Studium Künstliche Intelligenz / Robotik
Naturwissenschaften Physik / Astronomie Elektrodynamik
Technik Bauwesen
Technik Elektrotechnik / Energietechnik
Technik Maschinenbau
ISBN-10 0-08-046752-0 / 0080467520
ISBN-13 978-0-08-046752-8 / 9780080467528
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