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Construction And Working Of Hard Disk Drives
TYPES OF HDD External Hard Drives Internal Hard Drives Laptop Hard Drives
Hard Disks Sizes Available are: ,[object Object],[object Object],[object Object],[object Object],[object Object]
Construction of HDD ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What's Inside a Hard Drive? ,[object Object],[object Object],[object Object],[object Object],[object Object]
PLATTERS (contd..) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PLATTERS (5.25” AND 3.5”)
Round flat disk (platter)
Concentric Circles of Platters
Tracks and Sectors ,[object Object],[object Object]
Tracks and Sectors
STORAGE OF DATA in Platters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
STORAGE OF DATA in Platters (contd..) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Iron oxide media ,[object Object],[object Object]
Thin Film Media ,[object Object],[object Object],[object Object]
The Read/Write Heads ,[object Object],[object Object]
R/W Head
The Read/Write Heads ,[object Object],[object Object],[object Object],[object Object]
The Read/Write Heads
Front view of R/W Head
3 Platters and 6 R/W Heads
Head Arms ,[object Object]
Heads, Sliders, Arms, Actuator
Head Crash ,[object Object],[object Object],[object Object],[object Object]
Head Actuator ,[object Object],[object Object],[object Object]
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
A stepper motor actuator
A stepper motor actuator   ,[object Object],[object Object],[object Object],[object Object],[object Object]
A stepper motor actuator
Voice Coil Actuator
Voice Coil Actuator ,[object Object],[object Object],[object Object]
Types of Voice coil ,[object Object],[object Object]
Voice Coil Actuator
Spindle Motor
Spindle Motor ,[object Object],[object Object],[object Object]
Spindle Motor (contd..) ,[object Object],[object Object]
 
Air filter ,[object Object],[object Object],[object Object],[object Object]
Hard Disk Connectors and Jumpers
A standard hard disk IDE/ATA data interface connector   (40 pins)
Drive Electronics Circuit Board

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Chap2 hdd1