Hard Drive Data Recovery

1. Hard Drive Data Recovery By: Mike Liang CSc 253

2. Overview • Hard Drive Identification • Recovery Using Software • Recovery Involving Hardware • Gutmann’s Theory • Questions and Answers

3. Hard Drive Form Factors

4. Recent Form Factors • 5.25 inch: 5.75 in × 1.63 in × 8 in (146.1 mm × 41.4 mm × 203 mm) • 3.5 inch: 4 in × 1 in × 5.75 in (101.6 mm × 25.4 mm × 146 mm) • 2.5 inch: 2.75 in × 0.374–0.59 in × 3.945 in (69.85 mm × 9.5–15 mm × 100 mm) • 1.8 inch: 54 mm × 8 mm × 71 mm • 1 inch/1.3inch: 42.8 mm × 5 mm × 36.4 mm • 0.85 inch: 24 mm × 5 mm × 32 mm

5. Western Digital’s VelociRaptor

6. Interface Serial ATA SCSI

7. Interface ATA (IDE) – 3.5” ATA (IDE) – 2.5”

8. Interface Serial Attached SCSI (SAS)

9. Interface Fibre Channel (FC)

10. Interface USB

11. Interface Firewire

12. Interface eSATA

13. Data Recovery Software • GetDataBack • Publisher: Runtime Software • Current Version: 3.64 • Price: $79 (for NTFS), $69 (for FAT) • EasyRecovery Professional • Publisher: Kroll Ontrack • Current Version: 6.1 • Price: $499 (Standard Edition), $799 (Business Edition), $1499 (Commercial)

14. Data Recovery Software • Kernel Data Recovery • Publisher: Nucleus Data Recovery • Current Version: 4.03 • Price: $69 (Home User License), $129 (Corporate License), $249 (Technician License) • Title: R-Studio • Publisher: R-tools Technology Inc. • Current Version: 4.6 • Price: $79.99 (Standard), $179.99 (Network Edition), $899 (Technician License)

19. Simple Hardware Repair

20. Working in a Cleanroom

21. What to Replace?

29. Magnetic Force Microscopy (MFM)

31. Gutmann’s Theory • When a zero is overwritten with a one, you get something closer to 0.95 than one. • When a one is overwritten with a one, you get a value closer to 1.05 than one. • The circuitry in the hard drive ignores these small deviations.

32. Questions?