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Questions and Answers
What is the internal structure of a magnetic disk?
What is the internal structure of a magnetic disk?
- Metal plates coated with magnetic material fixed to a spindle (correct)
- A single metal plate with magnetic material attached to a spindle
- A set of magnetic heads mounted on arms
- Metal plates arranged in a circular pattern
What is a sector on a magnetic disk?
What is a sector on a magnetic disk?
- A group of tracks on all surfaces
- A group of bytes forming a circle on the disk surface
- Concentric rings on the disk surface
- The smallest unit of data that can be read or written (correct)
What is the purpose of an inter-Track gap on a disk surface?
What is the purpose of an inter-Track gap on a disk surface?
- To avoid data interference between neighboring tracks (correct)
- To improve the durability of the disk
- To enhance the disk rotation speed
- To increase the data storage capacity
Why are inter-Sector gaps important on a disk surface?
Why are inter-Sector gaps important on a disk surface?
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What is the function of a cylinder on a magnetic disk?
What is the function of a cylinder on a magnetic disk?
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Study Notes
Magnetic Disk Structure
- A magnetic disk is composed of concentric circles called tracks, divided into smaller areas called sectors, and grouped into cylinders.
Sectors on a Magnetic Disk
- A sector is the smallest unit of data storage on a magnetic disk, typically holding 512 bytes of data.
- Sectors are divided into three parts: ID, data, and ECC (Error Correcting Code).
Inter-Track Gaps
- Inter-Track gaps are narrow blank areas between tracks on a disk surface, ensuring that the read/write head can accurately navigate between tracks.
Inter-Sector Gaps
- Inter-Sector gaps are small blank areas between sectors on a track, allowing for efficient data retrieval and storage.
Cylinders on a Magnetic Disk
- A cylinder is a collection of tracks located at the same distance from the center of the disk, spanning across multiple platters (in multi-platter disks).
- Cylinders allow for efficient data access, as the read/write head only needs to move vertically to access different tracks within the same cylinder.
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