Magnetic Disk is type of secondary memory which is a flat disc covered with magnetic coating to hold information. It is used to store various programs and files. The polarized information in one direction is represented by 1, and vice versa. The direction is indicated by 0.
Magnetic disk are less expensive than RAM and can store large amounts of data, but data access rate is slower than main memory because of secondary memory. Data can be modified or can be deleted easily in the magnetic disk memory. It also allows random access of data.
Figure – Magnetic Disk
These are various advantages and disadvantages of magnetic disk memory.
These are economical memory
The easy and direct access of data possible.
It can store large amounts of data.
It has better data transfer rate than magnetic tapes.
It has less prone to corruption of data as compared to tapes.
These are less less expensive than RAM but more expensive than magnetic tape memories.
It need clean and dust free environment to store.
These are not suitable for sequential access.
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- Difference between Magnetic Disk and Optical Disk
- Magnetic Tape memory
- Magnetic Random Access Memory (M-RAM)
- Hard Disk Drive (HDD) Secondary memory
- Introduction of Compact Disk (CD) optical memory
- Difference between Random Access Memory (RAM) and Hard Disk Drive (HDD)
- Difference between Rotational Latency and Disk Access Time in Disk Scheduling
- Difference between Basic Disk and Dynamic Disk
- Difference between Seek Time and Disk Access Time in Disk Scheduling
- Difference between Transfer Time and Disk Access Time in Disk Scheduling
- Random Access Memory (RAM) and Read Only Memory (ROM)
- Difference between Virtual memory and Cache memory
- Introduction to memory and memory units
- Disk Formatting
- Disk Scheduling Algorithms
- LOOK Disk Scheduling Algorithm
- C-LOOK Disk Scheduling Algorithm
- FCFS Disk Scheduling Algorithms
- Difference between LOOK and C-LOOK Disk scheduling algorithms
- C-SCAN Disk Scheduling Algorithm