How to handle CDs and DVDs properly and what is the most code for them?

How to handle CDs and DVDs properly and what is the most code for them?

The first digital optical carrier appeared more than 25 years ago. You know what CDs and DVDs have the most code, how their average life is, and how he cares.

The first Compact Disc (CD) appeared more than 25 years ago. It was manufactured on August 17, 1982 in the German factory Philips. And most of us encountered CDs many years later, this discovery literally revolutionized the ability to write digital content. In the music industry, this invention is referred to as the transition of the transition from analog to digital music technology. Konen appeared wearing a piece of music that didn’t have to be treated like cotton, which was the fall of vinyl records – the stail had a duster or a clump of dust, and the speaker heard the music. Music without disturbing skill, the CD promised exactly that. Digital knowledge and optical technology have taken care of the new data carrier.

The first album to appear on it was ABBA’s “The Visitors”. The CD has become a catalyst for further innovation in digital deprivation, paving the way for the advent of DVDs and current Blu-ray technology. The first CD and a CD were first introduced in Japan in November 1982. The invention was introduced in the USA and Europe in March 1983.

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History CD

Philips and Sony have been working on the development of the CD since 1979. During the research, it was determined what parameter the CD should achieve. The memory capacity was supposed to hold one hour of recordings, later the capacity requirement was increased to 75 minutes to fit the entire recording of Beethoven’s Devt Symphony on one CD. In 1980, standard parameters were set for CDs, known as the “Red Book”.

Shortly after the CD was released in 1983, more than 1,000 different music titles were available. According to some, there have been more than 200 billion CDs in the world in 25 years. Although one CD is only 1.2 mm thin, if all the sold CDs were stacked on top of each other, it would circle the globe around. Thanks to its quality, portability and durability, the CD has been a very popular consumer for music and video. The CD is the forerunner of a number of different types of media designed for a wide range of applications (CD-ROM, CD-R and CD-RW, DVD, DVD-R / RW, DVD + R / RW, DVD-RAM, HD DVD and Blu-ray ).

Media CDs, DVDs and Blu-rays last a long time, but they are not indestructible
Although optical discs are less prone to damage, they must be handled with care. Every day, a huge amount of digital content is stored on CDs, DVDs, and new Blu-rays, so proper handling is a problem of data integrity. An album with family photos, which are looted on the disc, is of indescribable value for individuals. Learning a few instructions to properly save me can extend the life of optical media and help prevent data loss.


Original DVDs can be easily damaged.

How to handle optical discs

1. Do not touch the markings on the side of the optical disc. And some data is stored on the media or it is empty, in both cases there is a shiny side that is not known, sensitive to fingerprints, scabs, dust and all kinds of mechanical action. The disc should always fit behind the outer or inner edges. Optical media usually have only one feature side (there is a bag and both sides of the media).

2. Dark, cold and dry, all optical disks are happy. In the case of those uncompressed, ie those that can be written on, a laser beam is used for this and that. For these discs, the sun is a sunshine. Ultraviolet sunlight is so aggressive that it can damage the known layer inside the disc. High temperatures can jeopardize the stability of both the protective layer and the known layer. Heat can also trigger copper deformation, which ultimately causes errors in recording and irreversible data loss. Thus, moisture can adversely affect data integrity. Although the plastic material (polycarbonate) is watertight, the high humidity of the air, together with the high temperatures, causes the moisture to reach the known layers and possibly corroded. If you want to keep your files for years to come, you should store the media in boxes and special packaging, where they will be protected from the effects of ultraviolet light and where the temperature range from -5 ° C to a maximum of +30 ° C and relative humidity from 40 up to 60 percent.

3. Only the same disk is a reliable disk. If it ever gets a fingerprint or a speck of dust, it must be removed. Water and a soft rag that do not tie hairs are enough. Do not recommend solvents or aggressive cleaning agents. If there is greasy deposits on the disc, a special cleaning kit should be used, which can be purchased at specialist shops.

4. The described side of the disc does not play a significant role for that case. However, even this side should not be mechanically damaged or exposed to aggressive chemical solvents, because it is very thin and covers the layer of knowledge. At its deep depth, you will lose the meaning itself. Sometimes the labels overlay more codes, not slightly damaged the bottom, transparent layer. Therefore, markers with a soft spike are recommended for labeling, and labels with a durable layer of glue for labeling them. The quality of the label is important to the way the data is placed on the carrier. The electric motor inside the high-speed drive operates at a speed of several thousand revolutions per minute. A disc for which the label is not accurately displayed with a center hole may vibrate (oscillate), which negatively affects the accuracy of the image. In the worst case, media or mechanics can be damaged.

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Questions about wearing CDs and DVDs are worn

The lifetime of optical copper is unpredictable. What’s most important to them – light, stump, and something full of something else? Verbatim decided to inform the public, so it answered interesting questions.

What is the average life of a standard CD (pressed from the factory and looted home)? And how long, according to current knowledge, can a standard DVD (pressed from production and loom at home) last?

Tests performed in air-conditioned rooms demonstrate the quality of about 100 years for both CD-R and DVD-R copper. However, this only applies to discs stored under certain climatic conditions, so the quality of their lining naturally plays an important role. In this respect, the burner / medium combination is preferred. The way these discs are stored is very important (in plastic boxes upright, at temperatures of 20 and 25 ° C and 55% relative humidity, protected from light, smoke, etc.). Each time you use a CD-R / DVD-R, it shortens its remaining life, as do small scratches, fingerprints, dust, etc., which it is of course difficult to avoid. Careful handling is therefore important if we want to maintain the longest possible life of the media. Due to the influence of the user on this property, the bag cannot determine the exact longevity for a specific medium. For empty copper, we cannot determine the longevity at all, or no test data is available. However, for copper on which the data was written at the time of production, the service life is approximately the same as for copper intended for later data writing (provided that the media are made of the same quality material).

So the liveliness of a CD and a DVD is not worn at all?

Our tests performed at our premises have shown that this is the case.

Is it important for the life of the media how the data is stored on it (music, data files, etc.)?

For DVDs, it is basically not worn, as the writing here is always in a dark format, with a unified technology for error correction. In the case of CD-Rs, there are a number of writing formats that are equivalent to error correction. For example, with data from media that is written as data, run error detection and correction procedures, while not with a music CD. The data itself does not play a role.

Jak je nejastj pina pokozen dat na optickch nosich?

In order to answer this question, it is necessary to first look at how CDs and DVDs are made. A known layer is applied to the polycarbonate substrate, on which there is a metallic reflective layer. This is followed by a protective layer, which is made of a certain varnish for CD-Rs and a better mixture for DVD-Rs. The media is written down and by using a laser beam, which penetrates through the transparent plastic substrate to the known layers and then to the reflective layer, from which it abrades and returns. There are many known reasons why the media become unreadable. Among them are primarily damage caused by the user, such as scabies, fingerprints and other defects caused by physical handling of the media. The second example is their improper storage – for example in cars where it is hot, or in a place exposed to sunlight – there is a decomposition of the signs of the layer. And to the point, the quality of plundering is often insufficient, both due to defective burners, at high writing speeds, and because not all media are the manufacturer of some burners test room, etc. Errors in copper, which arose during the production itself, play your role. A typical example is the poor sealing of individual layers, which causes oxygen from the air to get into the record and the reflective layer, and as a result, it corrodes.

Which factors are particularly destructive from the point of view of optical disk life (light, foam, etc.)? Does color matter in this case (if so, what role)?

Light, heat, humidity, pellets and stumps have an effect on the wear and tear of the media. The color of the layer characters as such does not play a role. This is only an indicator of how the chemical substance was used for the known layer. The differences are the first in the quality of this substance, which can vary greatly from one copper to another.

What is the situation with the lifetime of copper urenches for high-definition data, such as Blu-ray and HD-DVD discs?
Our life tests of these copper rides are not complete. However, the results that are now available indicate that the lifespan of these media is about the same as that of CDs and DVDs.

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