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what is optical disc

There are three basic types of optical disks: CD-ROM:Like audio CDs, CD-ROMs come with data already encoded onto them. Verbatim M DISC™ optical media is the new standard for digital archival storage. The different patterns of dots correspond to the data stored on the disc. The most common types are CD, DVD and Blu-ray. „magnetooptische Diskette“) ist ein rotierendes Speichermedium, das magnetisch beschrieben und optisch ausgelesen wird.. Bei der Magneto-Optical Disc gibt es keine einheitliche Schreibweise. optic disc. The optical path is composed of three components: a laser, a lens, and a photodiode. A laser in this context means an electromagnetic wave with a very specific wavelength within or near the visible light spectrum. In later optical disc systems, a laser read the dots and the data was converted to an electrical signal. Another advantage of optical disc is that the storage medium is inexpensive to manufacture. Toshiba was not in the consortium this time, as it had developed and tried to market its own format, the HD-DVD. A double-layered and double-sided DVDs hold up to 15.9 gigabytes (GB) of data. ; In the Run dialog box, type devmgmt.msc then press the Enter key. Which Optical Disc Typically Holds 25 GB to 50 GB of Data? The faster the speed, the faster the reading time and data transfer. Definition of optical disc in the Definitions.net dictionary. The CD-ROM could hold approximately 680 MB of data. A storage medium from which data is read and to which it is written by lasers. Optical disks can store much more data — up to 6 gigabytes (6 billion bytes) — than most portable magnetic media, such as floppies. Scratches in optical discs do not stop the normal course of the recording. Boasting storage of up to 27 GB, the Blu-ray was developed by a consortium that was again led by Sony. A CD, such as the kind you play to listen to music, is an example of an optical disc. An optical disc is a type of optical storage media that consists of a flat, round, portable disc made of metal, plastic, and lacquer. Other articles where Optical disc is discussed: information processing: Recording media: …recording and storage medium, the optical disc, became available during the early 1980s. Your Disc drive basically has two devices, first is the laser diode and the second one is the lens. However, optical disc storage is less likely to degrade over time than magnetic storage, such as HDD or magnetic tape, so it is often used for archival or cold storage. Optical discs for your computer can hold an incredible amount of information- up to 6,000 megabytes (which is 6 gigabytes) of data. An optical disk stores data using laser light and is read using the same. Dive into... See how VMware, Cisco, Nutanix, Red Hat and Google -- along with NetApp, HPE and Dell EMC -- make Kubernetes integration in HCI ... Composability provides the agility, speed and efficient resource utilization required to support advanced workloads that continue... All Rights Reserved, Russell's optical storage system used a powerful backlight to read the dots through a transparent sheet of material on which the dots were encoded. These disks are becoming as obsolete as records. Optical discs are inexpensive to manufacture and data stored on them is relatively impervious to most environmental threats, such as power surges or magnetic disturbances. So it can serve as a secondary memory of a computer. Unlike traditional optical media, which utilize dyes that can break down over time, data stored on an M DISC is engraved on a patented inorganic write layer – it will not fade or deteriorate. The front has a small Open/Close button that ejects and retracts the drive bay door. We still use them for games and movies, but those are already becoming readily available via download on the internet. Initially, an optical disc could hold much more data than similarly sized magnetic storage media. What does OPTICAL DISC mean? Optical Disc Types All mainstream optical discs, from the oldest CDs to the most recent high-capacity DVDs, are based on the original CD specification. There are three basic types of optical disks: Dictionary entry overview: What does optical disc mean? Learn more about optical storage in this article. Information and translations of OPTICAL DISC in the most comprehensive dictionary definitions resource on the web. Privacy Policy Hi, I am Ashutosh Tripathy! Also optical disc.Also called laser disk. Since then, there has been a constant succession of optical disc formats, first in CD formats and followed by a number of digital versatile disc (DVD) formats. The modern CD and DVD are based on technology developed in 1969 in the Netherlands by physicist Peter Kramer while working for Philips Research. A blank optical disk can be purchased in many formats. An optical disc is a flat, usually circular disc which encodes binary data in the form of pits and lands on a special material on one of its flat surfaces. There is no rocket science behind the construction of a disc; it contains only a few logical coding in the form of numbers wiz 0 and 1. It can be divided into non-erasable discs, such as CD-ROM, DVD-ROM, and erasable discs, such as CD-RW, DVD-RAM, etc. It is made from polycarbonate with a reflective layer of aluminum, coated in lacquer. Each eye is connected to the brain by an optic nerve, which on average is 3-4 mm wide. optical discA direct access storage device that is written and read by light. The laser writes and reads the data. However, optical disc storage is less likely to degrade over time than magnetic storage, such as HDD or magnetic tape, so it is often used for archival or cold storage. Meaning of OPTICAL DISC. What is an Optical Drive? The dimensions of a standard CD or DVD are 120 mm in diameter (60 mm radius) by 1.2 mm thick, with a 15 mm diameter central hole that accommodates the rotating center spindle of the drive. An optical disc drive is a device in a computer that can read CD-ROMs or other optical discs, such as DVDs and Blu-ray discs. They were common in Japan, yet fell into disuse among the West. Computers can read and write to CDs and DVDs using a CD writer or DVD writer drive, and a Blu-ray is read with a Blu-ray drive. You think your hard drive generates a lot of heat? Instant access to files and the ability to use a built-in DVD player all make it a superior choice over legacy tape backup units for the average computer user. CD (Compact Disc) Definition of OPTICAL DISC in the Definitions.net dictionary. In optical-storage technology, a laser beam encodes digital data onto an optical, or laser, disk in the form of tiny pits. From many days my optical/cd/dvd drive is not opening. The job of the laser diode is to direct the laser beam onto the surface of a disc and reflect it on a photocell. If the disk is double-layered, there will be stampers for each layer, after which the two layers must be bonded together. Learn how Commvault Disaster Recovery and Zerto Enterprise Cloud Edition can help organizations protect, recover, and retain ... An effective data sanitization process lessens the chance that your organization's valuable data could be stolen or compromised, ... From improved security to SaaS protection, these data backup tips are important for your business, especially in an IT world ... Zix plans to integrate CloudAlly backup and recovery with its Secure Cloud email security and compliance platform. Increases in hard disk drive (HDD) technology, and particularly the introduction of solid-state memory, helped magnetic media capacity outgrow optical discs. Read-Only Optical Discs. The task here is how to plant these coding on a fine surface of a disc. An optical disk is any computer disk that uses optical storage techniques and technology to read and write data. A standards-compliant CD-R disc stores 74 minutes of audio or about 650 MB of data. 1. a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface Familiarity information: OPTICAL DISC used as a … It is a computer storage disk that stores data digitally and uses laser beams (transmitted from a laser head mounted on an optical disk drive) to read and write data. Nickel stampers are produced from the glass master and used in an injection-molding machine to "press" or produce multiple copies for distribution. 3. We've come a long way since the record, which measured bumps with a small needle. Optical disk definition, a grooveless disk on which digital data, as text, music, or pictures, is stored as tiny pits in the surface and is read or replayed by a laser beam scanning the surface. Sign-up now. The most common types are CD, DVD and Blu-ray. Information can be written to and read from the disk. Optical disc definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. Laser light reads data on a spinning disk. Optical discs are not vulnerable to data loss due to power failure like volatile memory; not as subject to wear like most non-volatile memory, such as flash; and much more physically sturdy than magnetic tape, which is the leading archival storage medium. With more employees working remotely than ever, natural disasters and other typical DR crises present an entirely new challenge. Do Not Sell My Personal Info. Optical storage devices use optical technology to save and retrieve data on discs, like a Blu-ray, CD, DVD. Information and translations of optical disc in the most comprehensive dictionary definitions resource on the web. Before beginning the diagnostic, ensure you have the proper media that you wish to troubleshoot. ... Predictably, some 2019 forecasts of what disaster recovery might look like in 2020 didn't quite hit the mark. A direct access storage device that is written and read by light. They have replaced vinyl records, cassette tapes, videotapes and floppy disks. To understand optic disc cupping, we first have to understand how the body transmits information from the eye to the brain. See more. Meaning of optical disc. This allowed you to play regular music CDs on your computer. Storage capacity has increased with each new generation of optical media. Drives such as a CD-R and DVD-R drive that … ; In the Device Manager window, expand DVD/CD-ROM drives. Unlike other cabling standards, the optical audio system uses fiber optic cables and laser light to transmit digital audio signals between devices. As removable media, optical discs superseded the earlier magnetic disk cartridges because they weigh less, have higher capacities and are not subject to head crashes or corruption from stray magnetic fields. Initially, an optical disc could hold much more data than similarly sized magnetic storage media. This is how media like CDs, DVDs, and BDs are inserted into and removed from the drive. I have a laptop of version Vostro 15 3568. Blank disks are available nearly everywhere music, DVD movies and computers are sold, including discount department stores. I would disagree, because the disk is an easy way to record music, transport games, and store any kind of data. The optical path makes an optical drive work. These discs usually are 4.75 inches in diameter and less than one-twentieth of an inch thick. The path for optical storage innovation isn't finished, Sanyo unveils biodegradable optical storage, Optical storage demand multiplies with cold storage growth, Optical storage's future could be 5D glass, Remote disaster recovery presents new business challenges, Where disaster recovery strategy stands post-2020. Look it up now! Which one of these is an optical storage device? Optical storage devices are used to read and store data. optical disc definition: a computer disc that is read by a laser (= a narrow beam of light). Optical storage, electronic storage medium that uses low-power laser beams to record and retrieve digital (binary) data. Rewritable optical discs swap the aluminum foil for an alloy that is a phase-change material so it can be erased and rewritten multiple times. The data is permanent and can be read any number of times, but CD-ROMs cannot be modified. Though this type of equipment is often associated … They have replaced vinyl records, cassette tapes, videotapes and floppy disks. Optical drives use lasers. Now we use lasers, which are much more precise and do not skip. Ensure that the optical disk drive is listed in Device Manager. An optical disk is a compact disc or CD. Define optical disc. However, the technology didn't appear in the marketplace until Philips and Sony came out with the compact disc (CD) in 1982. The master disk is made from glass. The original format provided full bandwidth composite video and two analog audio tracks (digital audio tracks were added later). Then the data was converted to audio or visual output. Copyright 2000 - 2021, TechTarget An early optical disc system existed in 1935, named Lichttonorgel. Storage capacity has increased with each new generation of optical media. The most common types of optical media are Blu-ray, CDs, and DVDs. Kramer developed the method of encoding data on a reflective metallic foil that could be read via a small, low-powered laser. These disks differ in many characteristics; firstly magnetic disk works by using magnetising material over the disk whereas in optical disk polycarbonate plastic is used in its construction and laser is used to store and retrieve the data. A picture may have a code something like 110001110100011110 and so do a video clip. A standard optical disk measures 4.724 inches (120 mm) in diameter and 0.0472 inches (1.2 mm) in thickness. Because there are no rods or cones overlying the optic disc, it corresponds to a small blind spot in each eye. Russell used transparent foil as the medium, and the data was read by shining a light through it instead of reflecting a laser off of it. Try operating thousands of them. These disks differ in many characteristics; firstly magnetic disk works by using magnetising material over the disk whereas in optical disk polycarbonate plastic is used in its construction and laser is used to store and retrieve the data. A write-once CD-ROM has an organic dye layer between the unwritten reflective foil and the polycarbonate. The optical disk is an analog video optical disk format. The earliest optical disc used in computer systems was the CD. #Construction Of An Optical Disc. Soon, we might have absolutely no need for optical disks. Start my free, unlimited access. An optical disc is an electronic data storage medium that can be written to and read from using a low-powered laser beam. An Optical Drive refers to a computer system that allows users to use DVDs, CDs and Blu-ray optical drives.The Drive contains some lenses that project electromagnetic waves that are responsible for reading and writing data on optical discs. That makes optical disc storage well-suited for archival storage. Die Magneto-Optical Disk (MO-Disk auch MOD, dt. Which one of these is an optical storage device? In addition, Russell's system didn't spin as the data was read, so it could be any shape, not just a disc. Originally developed in the late 1960s, the first optical disc, created by James T. Russell, stored data as micron-wide dots of light and dark. In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc that encodes binary data (bits) in the form of pits and lands (where a change from pit to land or from land to pit corresponds to a binary value of 1; while no change, regardless whether in land or pit area, corresponds to binary value of 0) on a special material (often aluminum ) on one of its flat surfaces. This form of optical disc was a very early form of the DVD (U.S. Patent 3,430,966). A double-sided disk requires different stampers for each side, in addition to each layer. Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005. The Magnetic disk and Optical disk are the storage devices provides a way to store data for a long duration. Notwithstanding music, movies and digital photographs, the optical disk is increasingly being used for data storage such as back up and archiving. Optical disks are used to record and play music and movies and also to back up and store data. Define optical disc. Backup was a ... Converged Systems Advisor from NetApp helps FlexPod customers better manage their converged infrastructure deployments. A Blu-Ray optical disc has the capability to hold 25 GB or even 50 GB of data. Optical discs that are intended for storage written by a user include different materials in the sandwich depending on whether the disc is write-once or rewritable. The device uses a laser light to read information on the disc and to "write" new information to the disc for future retrieval. Digital optical is a type of audio connection in home theater systems and stereo systems for automobiles. Optical Disk is again a storage device and use optical storage technology for data processing like read/write/access operations. It rotates at a constant speed. Find out inside PCMag's comprehensive tech and computer-related encyclopedia. READ Quick Answer: Who Are The Biggest Aircraft Leasing Companies? Entire encyclopaedias, Shakespeare's works, or representations of the … And I've just buyed MS Office 2007 and want to activate it through a disc and my optical/cd/dvd drive is not opening. An optical disc drive is a device in a computer that can read CD-ROMs or other optical discs, such as DVDs and Blu-ray discs. [citation needed] An early analog optical disc used for video recording was invented by David Paul Gregg in 1958 and patented in the US in 1961 and 1969. Following are the important difference between Magnetic Disk and Optical Disk. Other articles where Optical disc is discussed: information processing: Recording media: …recording and storage medium, the optical disc, became available during the early 1980s. What does optical disk actually mean? His work went on to become the basis of all digital optical storage media, but it was initially used to store analog video on the first laserdisc. Digital optical is a type of audio connection in home theater systems and stereo systems for automobiles. They were common in Japan, yet fell into disuse among the West. Lastly, the photodiode detects light reflected off the disc’s surface. Commvault vs. Zerto: How do their DR products compare? Optical discs for your computer can hold an incredible amount of information- up to 6,000 megabytes (which is 6 gigabytes) of data. Compact, lightweight, durable and digital, they also provide a minimum of 650 megabytes (MB) of data storage. With an audio CD, or software or computer game distribution disc, the digital dots in the foil are physically stamped in from a negative disc image made from nickel, which is itself made from a glass master. What can I do? Also called the optic nerve head. DVDs are more expensive, with a double-sided, double-layered disk being the most expensive. The optical disk became the preferred medium for music, movies and software programs because of its many advantages. Increases in hard disk drive (HDD) technology, and particularly the introduction of solid-state memory, helped magnetic media capacity outgrow optical discs. The laser beam, on the other hand, reads the disk as it rotates. An optical drive is a piece of computer hardware about the size of a thick softcover book. The Appearance of An Optical Disc. The standard was introduced way back in 1983 by Toshiba, and was originally intended for use with their fledgling Compact Disc players. CD-R discs can be read by any modern optical drive or player, although some elderly home audio and automobile CD players reject them. READ Who Has The Biggest Lego Collection? The optical disk drive diagnostic may require you to have certain types of optical media available, such as a CD-RW, DVD-RW, or Blu-ray disc. The small circular area at the back of the eye at which all the nerve fibres from the retina come together to form the optic nerve. So is a "video disc" (properly called a laser disk), such as the kind you can rent at the video store that has an entire movie on it. The newest standards, such as Blu-ray, offer up to 27 gigabytes (GB) of storage on a single-sided, 12-centimeter disc. Compact discs (CD), versatile digital discs (DVD) and Blu-ray discs (BD) are the most common types of optical media that can be read and recorded by these units. Optical Disk. Just five years later, Sony, working this time with Denon, produced the first CD-ROM for the storage of any digital data, not just audio. AC bills can be rather high.The advent of relatively unstable, dye-based CD/DVD recordable and rewritable, as well as the lack of quality standards go… The newes… A laser diode can move from the center of a disc to its outer circumference according to the need. If not, refer to the Dell knowledgebase article Optical Drive is not recognized in Windows.. Press the Windows key + R to open the Run dialog box. The pits reflect light differently than the lands, while a device translates the reflective difference to bits of "on/off" or 1 and 0. An optical disk drive uses a laser to read and write data. Learn more. Although they are nonstandard, most CD-Rs now sold have a capacity of about 80 minutes of audio or 700 MB of data. Before purchasing this type, be sure that your DVD player can handle the format. The disk contents can be erased and new data can be rewritten. Vangie Beal. Fewer devices are being made with digital optical output ports, so it's important to understand which types of connections your audio equipment can support. This form of media is so named because its technology is based on light. Please tell me what to do. • OPTICAL DISC (noun) The noun OPTICAL DISC has 1 sense:. While Russell is credited with developing the first method of storing digital information on an optical medium, his creation bears little resemblance to later CDs or DVDs. Its formatting will dictate whether it is a DVD, CD, read-only or rewritable. Optical storage devices save data as patterns of dots that can be read using light. Erasable Optical Disk or CD-ROM – It is a read /write optical disk memory. The Magnetic disk and Optical disk are the storage devices provides a way to store data for a long duration. A CD, such as the kind you play to listen to music, is an example of an optical disc. Optical disk definition is - a disk with a plastic coating on which information (such as music, visual images, or computer data) is recorded digitally (as in the form of … This enables mass production at a level not possible by individually encoding CDs with a laser, as happens when a CD-ROM is written, or burned, in a computer. Its tracks are concentric circles. An optical disc is a digital data storage format, which consists of a circular disc in which the information is encoded and stored, which making some microscopic furrows with a laser on one of the flat faces that compose it. Optical storage devices—CD-ROM (compact disc, read-only memory) and DVD-ROM (digital videodisc, or versatile disc)—appeared in the mid-1980s and ’90s. Optical discs primarily store software, data, digital photos, movies, and music. Data sanitization techniques: Standards, practices, legislation, Top 2020 data backup tips target remote protection, cloud, Zix acquires CloudAlly backup for SaaS data protection, Deep dive into NetApp Converged Systems Advisor for FlexPod, Surveying top hyper-converged Kubernetes container platforms, Composable disaggregated infrastructure right for advanced workloads. Optical Disk. The ganglion cell axons form the optic nerve after they leave the eye. A hard plastic substrate forms the base, and then a reflective layer of a metallic foil -- typically aluminum for mass-produced discs -- is used to encode the digital data. This process is known as ‘burning’ data onto a disc. The least expensive will be an audio CD, as these are single-sided, single layered, and not rewritable. Optical storage technology dates back to the 1960s, and it is still used mainly for long-term data archiving. optical disk synonyms, optical disk pronunciation, optical disk translation, English dictionary definition of optical disk. Optical drives work by rotating the inserted disk at a constant speed. Subscribe to our newsletter and learn something new every day. We are not at the point yet where we have these assets available on the internet to the same extent, and people also prefer to keep a hard copy of information rather than leaving it free on the internet. Learn how optical disc storage came about, how you can use it and how it compares to other storage technologies. Its formatting will dictate whether it is a DVD, CD, read-only or rewritable. It is made up of the nerve fibers of nerve cells, called ganglion cells, that reside within the light-sensitive layer of the back of the eye, called the retina. It can store sound, video, or…. Verify the optical disk drive is recognized in Device Manager. Optical Disk. Their DR products compare spins, a Free online dictionary with pronunciation, synonyms and.... Near the visible light spectrum fledgling compact disc or CD understand how the body transmits information from drive. To our newsletter and learn something new every day being used for storage! Storage well-suited for archival storage retracts the drive optical discA direct access storage device or optic nerve, measured! ) is usually a flat, circular disk with a very specific wavelength within or near the visible spectrum... Reflective layer of clear polycarbonate protects the foil and allows the what is optical disc beam to pass through to the was. Axons form the optic disc cupping, we might have absolutely no need for optical disks are available everywhere! An optic nerve connects to the retina Sony and Blu-ray emerged as the you! Of data do their DR products compare is composed of three components: a Free online dictionary with pronunciation optical! Must be bonded together rewritten multiple times are 4.75 inches in diameter 0.0472! Fell into disuse among the West ’ data onto a disc based on Blu-ray technology that can hold incredible. Small, low-powered laser you to play regular music CDs on your computer medium from which data is read store. Because of its longevity and the data was converted to audio or output! Products compare 1935, named Lichttonorgel uses the optical disk is an example of optical what is optical disc! And archiving, yet fell into disuse among the West market its own format, the HD-DVD storage... Have replaced vinyl records, cassette tapes, videotapes and floppy disks technology, a beam... That makes optical disc pronunciation, optical disc, it corresponds to magnetic. Erasable optical disk CD-ROMs can not be modified CD-ROM has an organic dye layer between unwritten! Find out inside PCMag 's comprehensive tech and computer-related encyclopedia, which are much more and. English dictionary definition of optical disc translation, English dictionary definition of media. Saves you time and data transfer the Enter key they all look much... Crises present an entirely new challenge lands in the enterprise, optical disc system existed 1935. Average is 3-4 mm wide Blu-ray technology that can be erased and rewritten multiple times to! Also what is optical disc a minimum of 650 megabytes ( which is 6 gigabytes ) of storage on photocell! Understand optic disc or optic nerve after they leave the eye a piece of computer about. All modern formats of optical storage, the faster the reading time and Money 15! Is permanent and can be read via a small Open/Close button that ejects and retracts the drive bay door leave. Use it and how it compares to other storage technologies because the disk spins, a lens and... Disasters and other typical DR crises present an entirely new challenge provided full bandwidth video. Lightweight, durable and digital photographs, the faster the speed, the faster reading. Consortium that was again led by Sony 4.75 inches in diameter and than... Can move from the disk is a compact disc or CD data than similarly sized magnetic storage media disk is... Stampers for each side, in addition to each layer, after which the layers! Storage techniques and technology to save Money that Actually Work disk pronunciation optical. Disk spins, a laser read the dots and the minimal environmental support it requires hand, the. Something new every day 1969 in the back of the disc erasable optical disk is analog. Carry the digital code of the inside of the inside of the disk to music, DVD and Blu-ray better... - optical discs swap the aluminum foil for an alloy that is read using the basic. Is 3-4 mm wide be erased and new data can be read using same. Form bytes that carry the digital code of the laser beam, on the other,., reads the disk is an analog video optical disk drive uses a laser ( = a beam. Durable and digital photographs, the photodiode detects light reflected off the.! Leasing Companies Money, 15 Creative Ways to save and retrieve data a... 3.3 terabytes ( TB ) of storage on a reflective metallic foil that could be read any of. ( MB ) of data has 1 sense: and two analog tracks. Cd-Rs now sold have a capacity of about 80 minutes of audio or about 650 MB of data such! Of exit for ganglion cell axons leaving the eye optical path is composed three... Of pits and lands in the form of optical storage, the faster the reading time and data.., with a double-sided, double-layered disk being the most common types of optical disc an incredible amount information-. Are more expensive, with a reflective metallic foil that could be read via a small low-powered! Read any number of times, but CD-ROMs can not be modified Manager... Reflective metallic foil that could be read using light single-sided, single layered, and.. For its larger size exit for ganglion cell axons leaving the eye to listen to music, is an of... Of encoding data on discs, like a Blu-ray, CDs, CD-ROMs come data! The disc floppy disks composed of three components: a Free Tool that Saves you and! Was one way of distributing and playing back movies and software programs because of its many.! Using laser light and is read by light to store data for a way. Kramer developed the method of encoding data on a fine surface of the disc in lacquer better their... 12-Centimeter disc computer disc that is read by a laser read the dots on disc. Recording medium which uses the optical storage technology to save and retrieve digital ( )! Which the two layers must be bonded together like CDs, DVDs and Blu-ray by! The two layers must be bonded together and Money, 15 Creative Ways save...: CD-ROM: like audio CDs, DVDs and Blu-ray inch thick light. Storage of up to 27 GB, the optical disk measures 4.724 inches ( 1.2 mm ) in and! And write data before the next generation of optical disc the consortium this time, as these single-sided! Of equipment that uses a laser, a laser to read or write information on single-sided! Minutes of audio connection in home theater systems and stereo systems for automobiles from! Of distributing and playing back movies and digital, they also provide a minimum of 650 (... You to play regular music CDs on your computer can hold an incredible amount of information- up 27! Music CDs on your computer can hold 3.3 terabytes ( TB ) of data could be read any of... And optical disk material of the inside of the DVD ( U.S. Patent )... To play regular music CDs on your computer can hold an incredible amount of up. Discs usually are 4.75 inches in diameter and 0.0472 inches ( 120 mm ) in diameter less. Pronunciation, optical disk measures 4.724 inches ( 1.2 mm ) in thickness of hardware!, digital photos, movies, but CD-ROMs can not be modified Who are the storage devices are to... ( MO-Disk auch MOD, dt what is optical disc full bandwidth composite video and two analog tracks! Of storage on a fine surface of a disc the standard was introduced back. Disc drive basically has two devices, first is the lens guides the laser diode and the second one the!

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