1. Construction And Working Of Hard Disk Drives

2. TYPES OF HDD External Hard Drives Internal Hard Drives Laptop Hard Drives

7. PLATTERS (5.25” AND 3.5”)

8. Round flat disk (platter)

9. Concentric Circles of Platters

11. Tracks and Sectors

18. R/W Head

20. The Read/Write Heads

21. Front view of R/W Head

22. 3 Platters and 6 R/W Heads

24. Heads, Sliders, Arms, Actuator

27. Comparison Characteristics Stepper motor actuator Voice coil actuator Access speed Slow Fast Reliability Poor Very good Automatic head parking No Yes Temperature sensitive Yes No Periodic maintenance Low level formatting No Positionally sensitive Yes No

28. A stepper motor actuator

30. A stepper motor actuator

31. Voice Coil Actuator

34. Voice Coil Actuator

35. Spindle Motor

40. Hard Disk Connectors and Jumpers

41. A standard hard disk IDE/ATA data interface connector (40 pins)

42. Drive Electronics Circuit Board