Logical Data Recovery
Logical Data Recovery
Module D-1 LOGICAL DATA RECOVERY TRAINING
D1.1 Introduction to Storage Device , Hard disk models
D1.2 Hard Disk Data recovery common problems, with fault
1. LOGICAL PROBLEMS (disk detected in BIOS are mainly logical problems)
2. PHYSICAL PROBLEMS (disk not detected in BIOS are main physical problems)
a. ELECTRONICAL FAILURE PROBLEMS
b. MECHANICAL FAILURE PROBLEMS
3. FIRMWARE PROBLEMS
D1.3 Understanding hard disk structure (platter, head, sector, cluster, track, cylinder,)
D1.4 Internal Parts of Hard Disk Demo Parts Identify SATA 3.5 Drive 1tb St31000333as
D1.5 Understand how data stored in hard disk & Microsoft files structure (FAT, NTFS, MBR)
D1.6 Working concept of Format, Partition & computer booting process,
D1.7 Data recovery Software used for different problems, steps with features
D1.8 Pen drive and Memory card logically data recovery concept
Data Recovery Training Course detail in depth
Module D-1 Logical Data Recovery Training
D1 .1 Introduction to Storage Device , Hard disk models
HDD Traditional Hard disk drives
Floppy Disk , Zip Drive, Tape Disk,CD/DVD, USB pen drive, Mobile technology storage
Types of hard disk 3.5” 2.5” 1.8”
SSD solid state disk
Difference between HDD & SDD disk drive
Basic understanding between different OS with different version
Windows (FAT16, FAT32, NTFS, NTFS5)
Unix (UFS, EAFS, HTFS, VxFS, FFS)
Linux (Ext2, Ext3, JFS, ReiserFS)
Apple Macintosh (HFS, HFS+)
Novell Netware (NWFS, Net386, NSS)
Difference between FAT & NTFS
Hard disk different models
Identify hard disk from models no
D1.2 Hard Disk Data recovery common problems, with fault
1. LOGICAL DATA RECOVERY PROBLEMS (disk detected in BIOS are mainly logical problems)
Common faults of logical problems
Master Boot Record MBR Failure:
Failure of Boot Sector.
Operating System Malfunction or Crash:
Data loss due to virus
Partition automatic loss
Partition shows but not access
Corruption of files on files systems
Corrupt File Structure
Cross Linked Files
Improper Shutdown:
Disk Repair Utilities:
Reformatted or Repartitioned Hard Drive:
Accidental Deletion of Data
Computer Virus:
Formatted hard disk
Deleted files& folders
PHYSICAL PROBLEMS (not detected in bios are main physical problems)
2 HARD DISK ELECTRONICS FAILURE MAIN PROBLEMS
Logic board (controller) failures.
Totally dead Hard Drive does not spin up
When hard disk connects to computer, computer does not start or hangs
Broken power connectors
Broken data connectors
Spindle/arm driver chip failure
You can see a burned component on the hard drive circuit board.
Connector of motor or head is damaged
Printed circuit board failures including pre-amplification
TVS diode blow up
Protection fuse, 0ohms resistor open
PCB Damaged due to liquid
Fire Damage
Ceramic capacitor short
Mosfet short, or not giving output
Data connector resistor open
Electric shock
Pcb circuit open / short
3 HARD DISK MECHANICAL FAILURE PROBLEMS
Clicking hard drive
Drive not spinning
Head crash
Damaged Platters
Actuator failure
Stepper motor failure
Spindle bearing seizure (block)
More voice from hard disk
Head stuck on platter
Liquid Damage
Fire Damage
Dropped Hard Drives
4. HARD DISK FIRMWARE FAILURE PROBLEMS
Hard disk not found in bios at all
Model of hard disk shows wrong
Head sticking voice ( may be due to firmware if hardware ok )
Shows up with wrong S/N
Show up with wrong Model no
Hard disk spinning but not shown in bios
Hard disk asked for password
Bad sector
Hang up on particular sectors
Identifies fine but fails to read any data or boot up operating system giving I/O Device errors
Smart error
Primary Master Hard Disk Fail
No operating system found
USB Device malfunctioned
S.M.A.R.T. Capable But Command Failed
Disk boot failure. Insert system disk and press enter
Hard drive not recognized
Drive Mount Failure or some other hard drive boot error.
The hard disk will spin up when powered on, but be incorrectly recognized / not recognized at all by the computer
The hard disk will spin up & be recognized correctly by the computer but the system will then hang during the boot process
HARD DISK LOGICAL DATA RECOVERY
D1 .3 Understanding Hard Disk Structure
Disk Platter
Read Write Head
Spindle motor
Head arm
Head actuator (voice coil actuator)
Air Filter
Tracks
Sectors
Cylinders
Cluster
Cluster size in FAT& NTFS
CHS cylinder head sector addressing
ZBR zoned boot record
Types of connection
SCSI, SATA, PATA
D1.4 INTERNAL PARTS OF HARD DISK DEMO HARD DISK from INSIDE
IDENTIFICATION OF INTERNAL PARTS, DISASSEMBLE SATA 3.5 DRIVE1TB ST31000333AS
HDA head and disk assembly
PCB printed circuit board
MCU micro Controller Unit
VCM voice coil motor controller
Buffer Memory
Flash chips
Shock sensor
TVS diode transient voltage suppression diode
Breath hole
Head contacts
Motor Contacts
Recirculation filter
Top dumper
Top platter
Platter clamp
Top magnet
Plate with heads and connectors
HSA head stack assembly
HSA stopper
VCM voice coil motor
VCM HSA Actuator
Arm
HGA Head Gimbals Assembly
Bearing
FPC flexible printer circuit
Gasket
Sliders
ABS air bearing surface
Preamp
Heater
Gimbal
Platter Clamp
Spacer ring
D1.5 Understanding data stored on hard disk &Microsoft files structure
What is a file system?
Types of files systems
DOS 3.3 (FAT12)
DOS 5.0 (FAT16)
Windows 3.1 (FAT16)
Windows 95 (FAT32 OSR 2)
Windows 98/ME (FAT32)
Windows NT/2K/XP (FAT32 / NTFS)
FAT file allocation table
NTFS New technology files system
FAT/NTFS COMPARISON
How FAT works
How data store in hard disk in fat
Explaining disk block allocation method
File slack space
Linked allocation
Attributes of files systems
NTFS File attributes
Deleting NTFS FILES
D1.6 working concept of Format, Partition & computer booting process,
Initializing a Hard drive
Low level Format (factory)
Initializing a hard drive with FDISK
Master partition table
Partition type codes
Partition table entry
Single primary partition
One primary with extended partition
Boot process
Hard disk boot sequence (dos)
Windows 2000 boot process
Post, MBR, Boot Record
NTFS
Partition boot sector
MFT (master file table)
Used of different software
D1.7 Data recovery Software used for different problems, steps with features
Data Recovery of MBR corrupted
Data Recovery of Deleted Files
Data Recovery from Deleted Partition
Data Recovery from Reformatted Partition
Data Recovery from External Drives
Data Recovery from USB Drive
Data Recovery from Camera Card
Data Recovery from CD/DVD
Data Recovery as RAW Recovery
Data Recovery from Damaged Sector
Data Recovery from RAID
Recovery Features
FAT Support
NTFS Support
Quick Scan
Deep Scan
Media File Recovery
Email Files Recovery
Microsoft Office File Recovery
Recovers from Unbootable Drive
Search and Recovery Options
Search by File Extension
Search by Date
Search by File Size
File Preview
Batch Recovery
Saves Scan Information
Network Recovery
Help & Support
Supported Configurations
Windows 7
Windows Vista
Windows XP
Top common data recovery software used in market
Stellar Phoenix
R Studio
Data rescue
Get data back
Power data recovery
Salvation
Encase
Kernel
Ptods
Hard disk Stennar
Hard disk Regenerator
Understanding Basic concept of RAID
D1. 8 Pen drive and Memory card logically data recovery concept
Pen drive data recovery
Memory card data recovery concept
Data recovery from Pen drives
Data recovery from memory card
Data recovery from Zip drives concept
Data recovery concept of iPods, Digital cameras, Mobile phone, etc
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