What is Secondary Memory

Secondary Storage Device is also called Auxiliary Storage Device. It is not part of the computer. It is connected to the computer separately. The data that is stored in it. He is permanent. That is, when the computer is closed, it does not delete the store data. According to the requirement, in the future, it can be seen by opening the save file or folders. Or improve it. And it can also be deleted by the user.

It has more storage capacity Secondary Storage Device can store many times more data than Primary Memory, which is transferable, and the speed of accessing data is slower than Primary Memory. Secondary Memory comes with a floppy disk, hard disk, compact disk, optical disc, memory card, pen drive, etc.

Hard Disk

The hard disk is the main device for data storage under CPU. It provides higher storage chords, reliability and faster speeds than other discs. If this disk is in the wrong place with a read and writes hard disk inside the box, then this environment remains intact and carefully. Read and write directly on any sector of any track of Write and Write hard disk, which makes reading or writing data faster. It is often referred to as 'C' drive on the computer. Under the computer, all the programs or data contained in this hard disk remains intact, which we use in accordance with our requirements.

Hard disk is available in 10 GB, 20 GB, 40 GB, 80 GB 100 GB, 500 GB etc.

The hard disk is divided into Traco and Sector which is called formatting.

Magnetic Tape

Magnetic tape is the most successful banking storage medium. In fact, we use cassettes for the collection and recording of songs. It works on the same principle.

Magnetic tape is made of 2400 to 3600 feet long and is made of polyester. It is wrapped in a reel.

Compared to punch cards and paper tape, huge data can be collected in it. No matter how many times the data is written in the tape, it can be erased and requires a magnetic tape drive. There are two reels in all the magnetic tape drives.

Floppy Disk

It is made of plastic on which the layer of ferrite is lying. It is made of very flexible plastic. Therefore it is called a floppy disk. On which is the plastic tomb. The jacket is called. A point is formed between the center of the floppy, from which the disk of the disk rotates. In this floppy disk, there are 80 data tracks and 64 tracks can be done in each track. It works the magnetic tape for salmon. Which revolves around 360 RPM per minute. Thereby, the problem of the defect of its recording head.

Pen Drive

It is a small keyring-shaped and easily used for the transfer and storage of files between USB-Universal Serial Bus compatible systems. It is available in different capacities. It is used by putting it into a USB port on the PC. It's also called a flash drive.

Optical Disk

This is the advanced technology of data storage in which data is read and written by the laser beam. Its move does not require access arm and read-write head as laser beam electronics may move.

Optical Disk contains a round disk of polycarbonate, on which a chemical substance remains. Optical Disk data is digitally stored, data is read by the reading and write on optical disks To reduce the efficiency of laser light, there are three types of optical disks -

DVD Drive

Blu Ray

What is Secondary Memory