What is Floppy Disk-
It is used to store data but it can store small amount of data and it is slower to access them than a hard disk
Floppy disk rounds in shape and a thin plastic disk coated with iron oxide. Data is retrieved or recorded on the surface of disk through a slot on the envelope. Floppy disk is removable from the drive. Floppy disk is available from the drive. Floppy disk is available in three sizes :, 8 inch ,5 1/4,3 1/2.
A floppy disk is a type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square lined with a fabric that removes dust particles from the spinning disk. These disks are read from and written to by a floppy disk drive.
It is referred to as floppy or Floppy disk, a floppy diskette is a type of storage media capable of
storing electronic data, like a computer file. The floppy diskette was first created in 1967 by IBM as an alternative to buying hard drives, which were very expensive at the time.
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How the floppy disk is used?
Modern computers did not have CD-ROM drives or USB, and floppy disks were the only way to install a new program onto a computer or backup your information. If the program was small (less than 1.44 MB for the 3.5" floppy disk), the program could be installed from one floppy disk. However, since most programs were larger than 1.44 MB, most programs required multiple floppy diskettes. For example,
the diskette version of Windows 95 came on 13 DMF diskettes and had to be installed one disk at a time.
Floppy disks were also a common place for users to store and backup their files. For example, a word processing file could be copied to a floppy disk and opened on another computer or stored as a backup.
Are floppy disks still used today?
There are still a few diehards who are still using floppy diskettes, some governments still even use 8" floppy diskettes.
However, since the early 2000s, computers began no longer shipping with floppy disk drives as users moved to CD-R and Zip drives to store their information. All the latest versions of Microsoft Windows also no longer have support for internal floppy drives since no new computers come with floppy drives.
How does a floppy disk store data in a disk?
A floppy disk is a magnetic media and stores and reads data on the disk using a read head. When a 3.5 inch floppy disk is inserted into the drive, the metal slide door is opened and exposes the magnetic disk in the floppy diskette. The read and write head uses a magnetic polarity of 0 or 1. Reading this as binary data, the computer can understand what the data is on the platter. For the computer to write information to the platter, the read/write head aligns the magnetic polarities, writing 0's and 1's that can be read later.
Types of Floppy Disk:-
- 8 inch floppy disk:-
The first disk was introduced in 1971. The disk was 8 inch in diameter with a magnetic coating. It is enclosed in a cardboard like case with the capacity of one megabyte. Conversely to hard drives, the heads touched the disk, like in a cassette or video player that wears the media down over time.
- 5.25 inch floppy disk:-
The 5.25" floppy diskette first started development in 1976 and later became a standard in 1978, these disks were first released with only 160 KB of disk space. These diskettes were commonly used in the 1980s and stopped being used in the early 1990s. See our 5.25" floppy diskette definition for further information, pictures, and related links.
- 3.5 inch floppy disk:-
The 3.5" floppy was created by IBM in 1984 and were first introduced with a total capacity of 720 KB.
The 1.44 MB floppy disk were used widely in the 1990s.
CD(Compact Disc):-
Definition of CD:-
It is the most popular and least expensive type of optical disc. A Compact disk(CD) is capable of being used as a data storage device along with storing of digital audio. The files are stored on this particular contiguous sectors.
CD are categorised into three main types as follows:-
1.CD-ROM(Compact Disc Read Only Memory)
2.CD-R(Compact Disc Recordable)
3.CD-RW(Compact Disc-Rewritable)
A compact disk is a flat, round, optical storage medium invented by James Russell.
The first CD was created at a Philips factory in Germany on August 17, 1982.
The opposite side of the disc has a label to help indicate what is on the disc.
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Various type of Compact disc as follows:-
1.CD-Read-Only Memory:-In 1985, the CD-ROM entered the market and went beyond audio to record optical data storage. CD-ROMs are readable by any computer with a CD-ROM drive. The CD-ROM follows the Yellow Book standard.
2.CD-interactive:-Released in 1993, CD-i could be played on CD players, but not in a CD-ROM drive. The format was later modified to be read by both. The CD-i follows the Green Book standard of specifications.
3.CD-ReWritable:-The CD-RW used a metallic alloy that reflected differently than regular compact discs. This change in reflectivity made a CD-RW unreadable to many early CD players. The CD-RW follows the Orange Book standard.
4.CD-Recordable:- The CD-R is a compact disc that can be written to once and read many times. Like the CD-RW, it follows the Orange Book, but unlike the CD-RW, the CD-R can be read on CD players released prior to its own introduction.
5.CD-ROM Extended Architecture.:-The CD-ROM XA is an extension of the standard CD-ROM that allows audio, video and computer data to be accessed simultaneously. It follows the Yellow Book standard and was created as a bridge between the CD-ROM and CD-i.
Photo CD. Designed by Kodak, the photo CD was created for the express purpose of storing photographs in a digital format that could be accessed and edited on a computer. It launched in 1992, and was originally designed to hold 100 high-quality images.
6.Video CD:- The video CD, or VCD, was created in 1993 and followed the White Book standard. VCD quality was intended to have comparable quality to VHS recordings, but has a much lower resolution than a modern digital video disk (DVD).
Digital Video Disk(DVD):-
DVD is also known as Super Density Disc(SDD) or Digital versatile disc(DVD).It is an optical disc storage media .DVD offers higher storage capacity than CDs while having the same dimensions.
Depending upon the disc type, DVD can store several Gigabytes of data(4.7GB to 17.08GB).DVDs are primarily used to store music or 6 movies and can be played back on your television 📺 or computer too. They are not rewritable media.
DVDs come in three varieties as follows:-
1.DVD-ROM(Digital Video Disc-Read Only Memory)
2.DVD-R(Digital Video Disc-Recordable)
3.DVD-RW(Digital Video Disc-Rewritable)
Note:-
The rate at which data is written to disc or read from disc is called data transfer rate.
Root Directory is the main folder or disc. It contains information about all folders on the disc.
Blu-Ray Disc:-
What is Blu-Ray Disc:-
It is an optional disk storage medium designed to re-capture the data normally in DVD format. Blu-ray disk(BD) contains 25GB(23.31Gb) per layer space. The name Blu-ray disc refers to the blue laser used to read the disc ,which allows information to be stored at a greater density than the longer -wavelength red laser used in DVDs.
Blu-ray can hold almost 5 times more data than a single layer DVD.
The Variations in the formats are as follows:-
1.BD-ROM(Read-Only)
2.BD-R(Recordable)
3.BD-RW(Rewritable)
4.BD-RE(Rewritable)
The Dual-layer Blu-ray discs will store 50 GB of data.
Blu-ray discs can hold more information than other optical media because of the blue lasers the drives use.
The laser is actually blue-violet, but "Blu-ray" rolls off the tongue a little easier than "Blu-violet-ray."
The blue-violet laser has a shorter wavelength than the red lasers used for CDs and DVDs.
It allows the laser to focus on a smaller area, which makes it possible to cram significantly more data on a disc.
Blu-ray is an optical disc format such as CD and DVD. It was developed for recording and playing back high-definition (HD) video and for storing large amounts of data. While a CD can hold 700 MB of data and a basic DVD can hold 4.7 GB of data, a single Blu-ray disc can hold up to 25 GB of data. Even a double sided, dual layer DVD (which are not common) can only hold 17 GB of data.
Read HDD meaning:
Read SDD uses and definition:-
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