License:
Copyright (C) 2006 CHENGDU YIWO Tech Development Co., Ltd (YIWO Tech Ltd, for short). All rights reserved.
Data Recovery E-book is a Free book. You may use Data Recovery E-book for free as well as copy, distribute and transmit Data Recovery E-book. And it is only for your personal, non-commercial use.
The core of information age is the information technology, while the core of the information technology consists in the information process and storage. Along with the rapid development of the information and the popularization of the personal computer, people find information more and more useful and need it ever more than the past. Owning to the massive data, there is a huge challenge to the data storage technology. So how to save so many documents and how to visit document as fast as possible become the key point. We know we need storage devices to save data, while there are so many kinds of storage devices and modes to save data. What’s more, when saving the data and information, it is more important to ensure the storage security as well as the accuracy, usability, reliability of data. Often, what is invaluable is that invisible data.
CONTENTS` .Elementary knowledge of data recovery......................................................................................4
1.Connotation of data................................................................................................................4
2.The essence of data recovery .................................................................................................5
3.The scope of data recovery ....................................................................................................5
4.The principle of data recovery ...............................................................................................6
a.Data loss.......................................................................................................................................6
1.Software reason......................................................................................................................7
2.Hardware reason ....................................................................................................................7
b.Data Protecting Technologies.......................................................................................................8
1.SMART Technology ..............................................................................................................8
2.SPS.........................................................................................................................................9
3.DFT ........................................................................................................................................9
4.Floppy disk array technology.................................................................................................9
5.SAN......................................................................................................................................10
6.NAS......................................................................................................................................10
7.Backup .................................................................................................................................10
c.Elementary knowledge of hard disk...........................................................................................10
1.History of hard disk development ........................................................................................10
2.Main technical specification and parameter of hard disk.....................................................12
3.Physical structure of hard disk .............................................................................................14
4.Logical organization of hard disk.........................................................................................15
5.Connection synopsis of hard disk ........................................................................................19
d.Hard disk data organization .......................................................................................................19
1.Primary formatting of hard disk...........................................................................................19
2.Advanced formatting of hard disk........................................................................................21
3.Data storage region of hard disk ..........................................................................................23
e.Common Cases of Partition Recovery .......................................................................................26
1.MBR Recovery ....................................................................................................................26
2.Recovery of Partition ...........................................................................................................29
3.Partition Table Doctor ..........................................................................................................29
4.The FAT table recovery ........................................................................................................37
f. FAT16 file system disk..............................................................................................................39
1.File management in root directory of FAT16 .......................................................................39
2. FAT16 sub-directory management ......................................................................................42
3. File deletion in FAT16.........................................................................................................43
4. Contents deletion in FAT16.................................................................................................46
5. Fast high level format in FAT16 partition ...........................................................................46
6.Full advanced format in FAT16 partition .............................................................................50
7.Searching files in FAT16 partition .......................................................................................51
g. Management of FAT32 file system ...........................................................................................56
1.Root directory management in FAT32 partition...................................................................56
2. Management of sub-directory in FAT32 .............................................................................61
3. File deletion in FAT32.........................................................................................................63
4. Sub-directory deletion in FAT32 .........................................................................................66
5.High-level format in FAT32 .................................................................................................68
h, Management of NTFS file system ............................................................................................72
1. The NTFS file system introduction.....................................................................................72
2.NTFS file system terminology .............................................................................................72
3. Data constructions of NTFS file system .............................................................................73
4.Drivers of NTFS...................................................................................................................73
5.DBR of NTFS file system....................................................................................................74
6. Metadata of NTFS file system ............................................................................................77
7. Files and folders of NTFS partition ....................................................................................81
8. Analysis of important metafile in NTFS file system - $MFT file analyzes ........................82
9. NTFS index record and contents.........................................................................................88
i. Dynamic disk introduction........................................................................................................91
1. Raid background .................................................................................................................91
2. Realization of RAID ...........................................................................................................92
3. Transform basic disk into dynamic disk..............................................................................93
4. Some terms..........................................................................................................................95
5.Characteristics of Dynamic disk ..........................................................................................98
6. Dynamic disk management .................................................................................................99
7. RAID 0 -- Striped Disk Array ...........................................................................................100
j.Case Study................................................................................................................................105
1. Introduction of Data Recovery Wizard 3.0 .......................................................................105
2. Matters needs attention before recovery ...........................................................................105
3. Deletedrecovery ................................................................................................................106
4.FormatRecovery.................................................................................................................112
5.Recover encrypt/compressed files in NTFS.......................................................................113
6.RAW RECOVERY ............................................................................................................114
7. Recovery when parts of partitions are lost:.......................................................................115
8. Data recovery in dynamic volume ....................................................................................119
9. Data recovery on inaccessible partition. ...........................................................................119
10. File recovery on RAW partition ......................................................................................125
11. Data recovery when all the partitions are lost .................................................................125
12Data recovery when GHOST Image restore failed........................................................129
13. After Partition Magic size revision/ combination/ division of partitions fails, how to
recover the lost data?.............................................................................................................129
14. When using Data Recovery Wizard 3.0 to recover files, there is some strange sound in
HD. How to handle it? ..........................................................................................................129
15. HD cannot be detected in BIOS, how to recover data by Data Recovery Wizard 3.0 ....129
16. There is not enough space in hard disk to save the recovered files, nor there is removable
storage device, how to handle it? ..........................................................................................129
17. How to recover data in other storage devices (eg: floppy disk, flash drive, removable disk
etc)?.......................................................................................................................................130
18. To recover image file, how can I know it can really recover the data before I buy Data
Recovery Wizard 3.0 ? ..........................................................................................................132
19. There are so many files recovered, how can I find the files I want fast? ........................133
20. I have recovered some files, but I cannot rightly open them...........................................135
21. In what occasion I cannot rightly recover data?..............................................................135
k.Introduction of data security software......................................................................................136