FDD - PowerPoint PPT Presentation

1 / 13
About This Presentation
Title:

FDD

Description:

A physical component of the computer which serves as a medium to ... 2. Hub. 3. Shutter. 4. Plastic Housing. 5. Paper Ring. 6. Magnetic disk. 7. Disk Sector ... – PowerPoint PPT presentation

Number of Views:98
Avg rating:3.0/5.0
Slides: 14
Provided by: Pra54
Category:
Tags: fdd | hub | usb

less

Transcript and Presenter's Notes

Title: FDD


1

HARDWARE WORHSHOP
  • FDD
  • Floppy Disk Drive

2
Introduction
  • What is a floppy disk drive ..??
  • A physical component of the computer which
    serves as a medium to read and write data to
    floppy disk
  • Sneak peak at FDDs brief history
  • Arrival in 1969(8 inches in diameter)
  • Invented By IBM team led by David Noble
  • Herald of 5 ¼ inch(1976) 3 ½ inch(1983) FDD
  • Maximum capacity of 3½-inch FDD is LS(Laser
    Servo)-240(1997) having size of 240.75 MB

3
DRIVE COMPONENTS
  • THE READ\WRITE HEAD
  • THE HEAD ACTUATOR
  • THE SPINDLE MOTOR
  • CIRCUIT BOARDS

4
READ / WRITE HEADS
  • The head mechanism is moved by a motor called
    head actuator
  • The heads move in and out tangentially to the
    surface of the disk and record the tracks
  • Both the upper and lower heads define tracks on
    their respective sides
  • Floppy disks are recorded to a maximum of 80
    tracks on each side

5
HEAD ACTUATOR
  • The head actuator consists of a motor called the
    stepper motor
  • The stepper motor rotates in discrete steps
  • Most stepper motors used in FDD's can step in
    specific increments that relate to track spacing
    on the disk
  • The timing of one half or one third of a head
    actuator mechanism is often used to determine the
    average access time for a disk drive

6
THE SPINDLE MOTOR
  • The spindle motor is what spins the disk
  • Normal speed of rotation is 300 or 360
    rpm(depends on the type of the drive)
  • 5 1/4 inch fdd -360 rpm
  • All modern drives use a direct drive system with
    no belts

7

Top view of a FDD
8
Circuit Board
  • Circuit boards contain circuitry used to control
    the head actuator, read- write heads, spindle
    motor, disk sensors and other drive components
  • A disk drive always incorporates one or more
    logic boards
  • The logic board implements the drives interface
    to the controller board in the system unit

9
TYPES OF FDD
  • 1.44MB 3 ½ INCH FDD
  • 2.88MB 3 ½ INCH FDD
  • 720 KB 3 ½ INCH FDD
  • 1.2 MB 5 ¼ INCH FDD
  • 360 KB 5 ¼ INCH FDD

8 inch, 5 ¼ inch, and 3.5 inch drives
10
Some Examples
11
FLOPPY CONSTRUCTION
1. Write Protect Tab 2. Hub 3. Shutter 4. Plastic
Housing 5. Paper Ring 6. Magnetic disk 7. Disk
Sector
12
THANK YOU
13
Presented By
  • Vishvendra Gupta
  • Udit Chandraul
  • Anurag Upadhyay
  • Pankaj Kumar
  • Suraj Savita
  • Niraj Vishvakarma
Write a Comment
User Comments (0)
About PowerShow.com