What is secondary memory?

What is secondary memory In today’s post, we are going to tell you what is secondary memory? You people must know that Computer Memory is of two types, First Primary and Second Secondary.

What is secondary memory
What is secondary memory

We can save our files, software, photographs and other types of data in the computer for a long time.

This work Primary Memory Can not do with Because this memory is of volatile nature. Meaning that it stores the data Temporary. When the computer is turned off, the store data that remains in this memory device. It disappears completely. For this reason, Secondary Memory is used on the computer.

This Storage Device Permanently stores the program and data in the computer. In this memory, you can store data, use it and delete the data simultaneously.

The best example of this is Hard Disk and Solid-State Drive . In today’s post, we are going to give you complete information about Secondary Memory. So friends, we must read this post till the end. Let’s see that What is secondary memory

What is secondary memory?

secondary memory computer key & nbsp; Permanent Storage Device & nbsp; is. In this place data and Software program is stored permanently.

The storage capacity of a Secondary Memory is mostly up to 16TB (Terabytes). But Primary Memory can store data up to 32 GB (Gigabytes) only.

Files, applications, multimedia, video, audio and photographs, etc. in our computer. Is kept All these stores remain in Secondary Storage. All these data are therefore stored in secondary storage.

Because Computer Processor cannot access Direct. For this, the first data should be Primary Memory (RAM ). Secondary memory is slow compared to RAM.

In this, even after the computer is turned off, your data remains safe. For this reason, it is called Non-Volatile. HDD and SSD is called “Secondary Memory”.

Pen Drives, CDs and DVDs etc. It is all used in Backup Memory. Its storage capacity is high. And it’s cheap.

Types of Secondary memory

There are mainly four types of Secondary Memory.

  1. Magnetic Tape
  2. Magnetic Disk
  3. Optical Disk
  4. Flash Memory

Magnetic Tape

Magnetic Tape is the oldest storage device for storing electronic data. Its use in the computer was stopped long ago. Magnetic Tape is a sequential access memory. In which store data is accessed in the order itself. For example, if the old audio cassette is used in old times if there is five Recording save.

Magnetic disk

Magnetic Disk is used as a Secondary Memory in the computer. It consists of a plate made of metal. On which the magnetic material is attached.

In a Magnetic Disk, this metal plate is called a Platter. And it also has a Mechanical Arm. Its job is to read and write data.

The Direct Access Method is used to take this memory data. Meaning that the user can directly access any information. Which remains store in Secondary Memory.

There are two types of Magnetic Disk.

Hard Disk Drive: This is called the main data storage device of the computer. This system has a Memory Device which is Operating System , Computer Application, stores files and data for a long time.

This is why it is also called Permanent Storage Device. The hard drive is inside the computer case and connects to the computer via data cable (PATA, SATA, SCSI). Its storage capacity is very high.

Floppy Disk : This is a removable magnetic disk. Which was used in the main storage device in computers since 1990. It is also called Floppy Diskette. It is made of a Flexible Magnetic Disk.

Optical Disk

Optical Disc is also a storage medium, which is used as Secondary Memory in the computer. This disc is used to store music, video and software programs.

Some of the major optical discs used most often are as follows –

Compact Disc (CD) : It is a round shape disc made of plastic. Which stores data optically. CDs are used to store audio, video and applications. It is removable. A CD can store up to 700MB of data.

Digital Versatile Disc (DVD) : It is also known as Digital Video Disc. It is only on the CD. In this, a lot of data can be stored. The storage capacity of this disc varies from 4.7 GB to 8.5 GB.

Blue-ray Disc : This is a type of optical disc. Which is just like a CD and DVD in Shape. Blue-ray discs can hold about 25 GB of data. Out of this, high-definition videos or movies are stored.

Flash Memory

This is also a Secondary Memory. Which is mostly used to keep backup of data. This is a type of EEPROM. This is a removable storage device. Therefore, it is also used to transfer data from one computer to another.

Some examples of Flash memory are described below

Memory Card : It has a small chip. Which is used to store data in Mobile Phone, Camera, MP3 Player and other portable devices.

Pen Drive : This is a Portable Storage Device, used to transfer audio, video and data files from one computer to another. Is done for.

SSD (Solid-State Drive) : More and more are being used in computers nowadays. NAND Flash Memory is used in SSD. In which there is no moving part of any kind.

Features of Secondary Memory

1. Secondary memory is the memory of a non-volatile nature.

2. The data is stored permanently in this memory.

3. It has the capacity to store many TB (Terabytes) data.

4. It costs much less than Primary Memory.

5. It is used in computer for Backup Memory.

Difference between Primary and Secondary storage

Primary MemorySecondary Memory
This is permanent and temporary memoryThis is a Permanent memory.
Primary memory is more expensive compared to Secondary Memory.Secondary memory is cheaper in comparison to primary memory.
In this memory, store data is directly accessed from the CPU.CPU access the data store in this memory. But for that, first load the data in Primary Memory.
It is also called Main Memory or System Memory.It is also called Secondary Storage Device and External Memory.
example – RAM, ROMCache Memory or Register.example Hard Disk और Solid-State Drive etc.
Difference between Primary and Secondary storage

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