Magnetic disks store data on magnetic platters that are spun by a spindle. A read/write head moves across the platters via an actuator to write data by magnetizing patterns on the surface and read data by detecting the magnetic polarity of patterns. The head, actuator, and ribbon cable connecting the disk to the motherboard work together to allow the disk to write electronic pulses as magnetic patterns and read those patterns as electrical currents.

1. MAGNETIC DISK
PRESENTATION BY PRAMOD
POUDEL

2. INTRODUCTION
•Storage device that uses magnetization process
•Stores data in tracks and sectors
•Consist of
• Platter: made by nonmagnetic materials covered by
magnetizable materials
• Spindle: rotate platter
• Head: read and write data bit
• Actuator: moves the head arm
• Ribbon cable: connects motherboard and magnetic disk
PRESENTATION BY PRAMOD POUDEL 1

3. PRESENTATION BY PRAMOD POUDEL 2

4. WORKING MECHANISM
•To write
• Electronic pulse are sent to head
• Produce magnetic field
• Resulting magnetic patterns are recorded
•To read
• Surface under the head produces current
• Produced current is of same polarity as recorded
PRESENTATION BY PRAMOD POUDEL 3

5. PRESENTATION BY PRAMOD POUDEL 4

6. PRESENTATION BY PRAMOD POUDEL 5
Any
Questions

7. PRESENTATION BY PRAMOD POUDEL 6