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What is Optical disk
published: 20 Jun 2018
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Optical Drives
In this video from ITFreeTraining, I will have a look at optical drives. Optical drives don’t have the market share that they once did; however, you will find that they still get used in some cases particularly in business, but optical media market share is falling.
Download PowerPoint: https://itfreetraining.com/handouts/ap/3c40.pptx
Let’s have a closer look at how the laser works. Firstly, let’s consider an optical disc. A laser is needed to either read or burn to the optical disc. The laser will need to be focused, thus the assembly contains a lens to do this. All these parts are manufactured inside a housing. Thus, there are no servable parts inside, since the housing is generally incased in plastic, thus you won’t be able to access them.
That is the basics of how an optical drive w...
published: 19 Mar 2023
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How does it work ? - Optical disk drives
How does it work ? - Optical disk drive
published: 02 Jul 2023
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How Does Blu-ray Work? - LaserDisc, CD, DVD, Blu-ray Explained
LaserDisc, CD, DVD, Blu-ray are all one big happy family - with the exception of HD DVD, which was disinherited for being too stubborn. This video explains how these optical discs work in practical terms.
A couple of things have been left out for the sake of simplicity and/or brevity. For instance, Blu-ray discs are layered differently from their predecessors. Where CDs have a thick transparent layer and a thin supportive back layer, Blu-ray are opposite. The transparent layer is much stronger than those of CDs due to new technologies, and with a thicker back layer BDs are stronger and cheaper to produce. Also, problems with the laser light misreading the data due to errors in the transparent material, has been reduced.
Another thing I omitted from the animation was the fact that the las...
published: 07 Sep 2017
-
Optical Disks - Georgia Tech - HPCA: Part 4
Watch on Udacity: https://www.udacity.com/course/viewer#!/c-ud007/l-872590121/m-1098998561
Check out the full High Performance Computer Architecture course for free at: https://www.udacity.com/course/ud007
Georgia Tech online Master's program: https://www.udacity.com/georgia-tech
published: 23 Feb 2015
-
optical disk | Secondary Storage devices | Computer Fundamentals |
Related Links-
HTET previous year solved questions playlist - https://youtu.be/zAgUlyUWOeQ
Data Structure playlist : https://www.youtube.com/playlist?list...
UGC NET 2019 solved papers topicwise- https://www.youtube.com/playlist?list...
DBMS MCQs for NET,GATE,HTET,ISRO and all competitive exams:- https://www.youtube.com/playlist?list...
C++ MCQs for NET,GATE,HTET,ISRO and all competitive exams:- https://www.youtube.com/playlist?list...
Please like,share,comment and subscribe our channel if you like our video
published: 22 Jan 2021
-
Why YOU NEED a CD-ROM Drive in 2023!
PS2 to USB adapter: https://amzn.to/3WVrAPN
DVD-ROM drive to USB: https://amzn.to/3X01A63
DVD-ROM drive (internal): https://amzn.to/48zpjAT
Universal Drive Adapter: https://amzn.to/3Gw39TC
🌐 Web: https://www.HeineHouse.com
🤖 Discord: https://discord.gg/WuyknCf
✅ Patreon: http://www.patreon.com/JasonHeine
🎶 Music:
🥁 Spotify: https://spoti.fi/2OdeifP
📻 Web: https://www.heinehouse.com/music
🎧 Bandcamp: https://jasonheine.bandcamp.com
🎸 Apple Music: https://apple.co/35I7VbJ
📱 Social Media:
🎥 Twitch: http://www.Twitch.tv/TheHeineHouse
📸 Instagram: http://instagram.com/HeineHouse
🐦 Twitter: https://twitter.com/HeineHouse
🕖 TikTok: https://bit.ly/3b4ElRh
😊 Facebook: http://www.Facebook.com/HeineHouse
🎛️ Podcasts:
🎙️ Heine House Gaming & Tech: https://www.heinehouse.com/podcast
🎙️ All...
published: 01 Jan 2023
-
How to clean an optical CD DVD drive that is not reading disks anymore
It ended up in a full tear-down... If you made it to put your DVD drive into work again, try using WinX DVD Ripper Platinum software to make a digital copy of your DVDs in 2023. Free download it here:
https://www.winxdvd.com/dvd-ripper-platinum/?ttref=2302-ytb-pt-DIY-incl-may
published: 30 Dec 2020
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Optical Media
In this video from ITFreeTraining, I will look at optical media. Optical discs have been around since the 70’s and gained a lot of market share in the 90’s. However, with the increasing use of online storage and storage such as flash memory, there has been a decline, but it is still something that you will come across from time to time.
Download PowerPoint: https://itfreetraining.com/handouts/ap/3c20.pptx
For the CompTIA exam, you most likely won’t get asked any difficult questions on optical media, if you get a question at all. So, I would not worry about memorizing the information in this video, just have a bit of an understanding. At the end of the video, I will cover what you need to know to support optical media in the real world.
Say ROM as Rom
The first optical media to take off...
published: 24 Dec 2022
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Optical Disk Drives
(c) 2015 Marilyn Wolf
published: 18 May 2015
6:08
Optical Drives
In this video from ITFreeTraining, I will have a look at optical drives. Optical drives don’t have the market share that they once did; however, you will find t...
In this video from ITFreeTraining, I will have a look at optical drives. Optical drives don’t have the market share that they once did; however, you will find that they still get used in some cases particularly in business, but optical media market share is falling.
Download PowerPoint: https://itfreetraining.com/handouts/ap/3c40.pptx
Let’s have a closer look at how the laser works. Firstly, let’s consider an optical disc. A laser is needed to either read or burn to the optical disc. The laser will need to be focused, thus the assembly contains a lens to do this. All these parts are manufactured inside a housing. Thus, there are no servable parts inside, since the housing is generally incased in plastic, thus you won’t be able to access them.
That is the basics of how an optical drive works, so let’s now have a look at the differences between different optical drives.
Now that we have a basic understanding of how optical drives work, let’s have a look at what types are available.
The next type are portable drives, for example USB. There are also portable drives that support interfaces like Thunderbolt. In this case this optical drive is USB 3. This optical drive has two plugs which are the type A and the type C connector. The second plug in this case is only for convenience as only one is required to operate it. USB 3 provides more power than USB 2, but in the case of this optical drive, only one plug is required even if it is operating with a USB 2 connection.
The next type of portable optical drive that I will look at is USB 2. You will notice, in this case, there are two USB plugs. One is for power and the other one is for data. If you come across an optical drive like this one, in order for it to operate, it needs both USB plugs plugged in. Keep this in mind if you come across an optical drive with two USB plugs, depending on the optical drive, both may be required to be plugged in for the optical drive to operate.
The last type of optical drive that I will look at is an internal laptop optical drive. These optical drives are used in older style laptops. They could be easily installed or removed from the laptop. With the reduced use of optical drives, you don’t see them used in laptops anymore. If an optical drive is required for a laptop, they are generally an external USB or are fixed inside the laptop.
Since optical drives have been around for a long time, the technology has matured so much that if you are purchasing a new optical drive, the only real features that you need to worry about is if it is internal or external and if it supports DVD or Blu-ray. Blu-ray drives are more expensive than DVD drives. If I am purchasing one for home, I will generally purchase a good external Blu-ray drive so I can use it on any computer that I wish. For business, often a DVD drive will be good enough as Blu-ray did not really take off in the business world. To be honest, DVD drives are slowly disappearing from the business world as well.
However, if you are working in IT support and someone requests an optical drive, they all look pretty similar. I will now have a look at what you need to look at when picking an optical drive.
In some cases, it may not be so clear by looking at the optical drive, what it supports as there will be no logos on the front of the drive. When this occurs, you will need to look at the rest of the drive for clues like the stickers on the drive. In the case of this drive, a small part of the stickers says “Super Multi DVD Writer” letting us know that is a DVD optical drive. The word multi, unlike combo, means that the drive supports burning for CD and DVD.
Combo drives, although rarer nowadays then they used to be, are still sold, so keep this in mind when purchasing an optical drive. A combo drive will be able to read newer media and older media but will only be able to write to older media.
That concludes this video on optical drives. I hope you have found this video useful, and I look forward to seeing you in more videos from us. Until the next video from us, I would like to thank you for watching.
References
“The Official CompTIA A+ Core Study Guide (Exam 220-1001)” Chapter 6 Paragraph 231-244
“CompTIA A+ Certification exam guide. Tenth edition” Page 436
“Blu-ray” https://en.wikipedia.org/wiki/Blu-ray
“Picture: Blu-Ray Laser” https://en.wikipedia.org/wiki/File:BluRayLaser.JPG
“Picture: Difference between different optical burners lasers” https://upload.wikimedia.org/wikipedia/commons/a/ad/Comparison_CD_DVD_HDDVD_BD.svg
Credits
Trainer: Austin Mason http://ITFreeTraining.com
Voice Talent: HP Lewis http://hplewis.com
Quality Assurance: Brett Batson http://www.pbb-proofreading.uk
https://wn.com/Optical_Drives
In this video from ITFreeTraining, I will have a look at optical drives. Optical drives don’t have the market share that they once did; however, you will find that they still get used in some cases particularly in business, but optical media market share is falling.
Download PowerPoint: https://itfreetraining.com/handouts/ap/3c40.pptx
Let’s have a closer look at how the laser works. Firstly, let’s consider an optical disc. A laser is needed to either read or burn to the optical disc. The laser will need to be focused, thus the assembly contains a lens to do this. All these parts are manufactured inside a housing. Thus, there are no servable parts inside, since the housing is generally incased in plastic, thus you won’t be able to access them.
That is the basics of how an optical drive works, so let’s now have a look at the differences between different optical drives.
Now that we have a basic understanding of how optical drives work, let’s have a look at what types are available.
The next type are portable drives, for example USB. There are also portable drives that support interfaces like Thunderbolt. In this case this optical drive is USB 3. This optical drive has two plugs which are the type A and the type C connector. The second plug in this case is only for convenience as only one is required to operate it. USB 3 provides more power than USB 2, but in the case of this optical drive, only one plug is required even if it is operating with a USB 2 connection.
The next type of portable optical drive that I will look at is USB 2. You will notice, in this case, there are two USB plugs. One is for power and the other one is for data. If you come across an optical drive like this one, in order for it to operate, it needs both USB plugs plugged in. Keep this in mind if you come across an optical drive with two USB plugs, depending on the optical drive, both may be required to be plugged in for the optical drive to operate.
The last type of optical drive that I will look at is an internal laptop optical drive. These optical drives are used in older style laptops. They could be easily installed or removed from the laptop. With the reduced use of optical drives, you don’t see them used in laptops anymore. If an optical drive is required for a laptop, they are generally an external USB or are fixed inside the laptop.
Since optical drives have been around for a long time, the technology has matured so much that if you are purchasing a new optical drive, the only real features that you need to worry about is if it is internal or external and if it supports DVD or Blu-ray. Blu-ray drives are more expensive than DVD drives. If I am purchasing one for home, I will generally purchase a good external Blu-ray drive so I can use it on any computer that I wish. For business, often a DVD drive will be good enough as Blu-ray did not really take off in the business world. To be honest, DVD drives are slowly disappearing from the business world as well.
However, if you are working in IT support and someone requests an optical drive, they all look pretty similar. I will now have a look at what you need to look at when picking an optical drive.
In some cases, it may not be so clear by looking at the optical drive, what it supports as there will be no logos on the front of the drive. When this occurs, you will need to look at the rest of the drive for clues like the stickers on the drive. In the case of this drive, a small part of the stickers says “Super Multi DVD Writer” letting us know that is a DVD optical drive. The word multi, unlike combo, means that the drive supports burning for CD and DVD.
Combo drives, although rarer nowadays then they used to be, are still sold, so keep this in mind when purchasing an optical drive. A combo drive will be able to read newer media and older media but will only be able to write to older media.
That concludes this video on optical drives. I hope you have found this video useful, and I look forward to seeing you in more videos from us. Until the next video from us, I would like to thank you for watching.
References
“The Official CompTIA A+ Core Study Guide (Exam 220-1001)” Chapter 6 Paragraph 231-244
“CompTIA A+ Certification exam guide. Tenth edition” Page 436
“Blu-ray” https://en.wikipedia.org/wiki/Blu-ray
“Picture: Blu-Ray Laser” https://en.wikipedia.org/wiki/File:BluRayLaser.JPG
“Picture: Difference between different optical burners lasers” https://upload.wikimedia.org/wikipedia/commons/a/ad/Comparison_CD_DVD_HDDVD_BD.svg
Credits
Trainer: Austin Mason http://ITFreeTraining.com
Voice Talent: HP Lewis http://hplewis.com
Quality Assurance: Brett Batson http://www.pbb-proofreading.uk
- published: 19 Mar 2023
- views: 7962
2:24
How Does Blu-ray Work? - LaserDisc, CD, DVD, Blu-ray Explained
LaserDisc, CD, DVD, Blu-ray are all one big happy family - with the exception of HD DVD, which was disinherited for being too stubborn. This video explains how ...
LaserDisc, CD, DVD, Blu-ray are all one big happy family - with the exception of HD DVD, which was disinherited for being too stubborn. This video explains how these optical discs work in practical terms.
A couple of things have been left out for the sake of simplicity and/or brevity. For instance, Blu-ray discs are layered differently from their predecessors. Where CDs have a thick transparent layer and a thin supportive back layer, Blu-ray are opposite. The transparent layer is much stronger than those of CDs due to new technologies, and with a thicker back layer BDs are stronger and cheaper to produce. Also, problems with the laser light misreading the data due to errors in the transparent material, has been reduced.
Another thing I omitted from the animation was the fact that the laser and photocell move together, across the disc. I'm still on the fence if this is interesting or important and chose to leave it out due to time restraints (my own, not the video's).
HD DVD was very short-lived, only being actively produced between 2006 and 2008, when it was abandoned and the HD DVD group was dissolved. BD had won. Ultra HD Blu-ray seems poised to supersede Blu-ray in the near future, but if you ask me it's a pretty cumbersome name, for now.
🌏🌍🌎 Care to add your own language in subtitles?
http://www.youtube.com/timedtext_video?v=H-jxTzFrnpg&ref=share
Awesome:
▶▶ Become a patron: https://www.patreon.com/sebvandenbrink
▶ Subscribe: https://www.youtube.com/channel/UCyD3sEJLC52UzR1wjtclsPw/?sub_confirmation=1
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▶ Instagram: http://www.instagram.com/sebvandenbrink
Sources:
https://en.wikipedia.org/wiki/Optical_disc
http://electronics.howstuffworks.com/blu-ray1.htm
http://www.explainthatstuff.com/cdplayers.html
https://wn.com/How_Does_Blu_Ray_Work_Laserdisc,_Cd,_Dvd,_Blu_Ray_Explained
LaserDisc, CD, DVD, Blu-ray are all one big happy family - with the exception of HD DVD, which was disinherited for being too stubborn. This video explains how these optical discs work in practical terms.
A couple of things have been left out for the sake of simplicity and/or brevity. For instance, Blu-ray discs are layered differently from their predecessors. Where CDs have a thick transparent layer and a thin supportive back layer, Blu-ray are opposite. The transparent layer is much stronger than those of CDs due to new technologies, and with a thicker back layer BDs are stronger and cheaper to produce. Also, problems with the laser light misreading the data due to errors in the transparent material, has been reduced.
Another thing I omitted from the animation was the fact that the laser and photocell move together, across the disc. I'm still on the fence if this is interesting or important and chose to leave it out due to time restraints (my own, not the video's).
HD DVD was very short-lived, only being actively produced between 2006 and 2008, when it was abandoned and the HD DVD group was dissolved. BD had won. Ultra HD Blu-ray seems poised to supersede Blu-ray in the near future, but if you ask me it's a pretty cumbersome name, for now.
🌏🌍🌎 Care to add your own language in subtitles?
http://www.youtube.com/timedtext_video?v=H-jxTzFrnpg&ref=share
Awesome:
▶▶ Become a patron: https://www.patreon.com/sebvandenbrink
▶ Subscribe: https://www.youtube.com/channel/UCyD3sEJLC52UzR1wjtclsPw/?sub_confirmation=1
Get in touch:
▶ Twitter: http://www.twitter.com/sebvandenbrink
▶ Facebook: http://www.facebook.com/sebvandenbrink
▶ Reddit: http://www.facebook.com/u/sebasvandenbrink
▶ Instagram: http://www.instagram.com/sebvandenbrink
Sources:
https://en.wikipedia.org/wiki/Optical_disc
http://electronics.howstuffworks.com/blu-ray1.htm
http://www.explainthatstuff.com/cdplayers.html
- published: 07 Sep 2017
- views: 538901
2:32
Optical Disks - Georgia Tech - HPCA: Part 4
Watch on Udacity: https://www.udacity.com/course/viewer#!/c-ud007/l-872590121/m-1098998561
Check out the full High Performance Computer Architecture course for ...
Watch on Udacity: https://www.udacity.com/course/viewer#!/c-ud007/l-872590121/m-1098998561
Check out the full High Performance Computer Architecture course for free at: https://www.udacity.com/course/ud007
Georgia Tech online Master's program: https://www.udacity.com/georgia-tech
https://wn.com/Optical_Disks_Georgia_Tech_Hpca_Part_4
Watch on Udacity: https://www.udacity.com/course/viewer#!/c-ud007/l-872590121/m-1098998561
Check out the full High Performance Computer Architecture course for free at: https://www.udacity.com/course/ud007
Georgia Tech online Master's program: https://www.udacity.com/georgia-tech
- published: 23 Feb 2015
- views: 6775
12:00
optical disk | Secondary Storage devices | Computer Fundamentals |
Related Links-
HTET previous year solved questions playlist - https://youtu.be/zAgUlyUWOeQ
Data Structure playlist : https://www.youtube.com/playlist?list...
...
Related Links-
HTET previous year solved questions playlist - https://youtu.be/zAgUlyUWOeQ
Data Structure playlist : https://www.youtube.com/playlist?list...
UGC NET 2019 solved papers topicwise- https://www.youtube.com/playlist?list...
DBMS MCQs for NET,GATE,HTET,ISRO and all competitive exams:- https://www.youtube.com/playlist?list...
C++ MCQs for NET,GATE,HTET,ISRO and all competitive exams:- https://www.youtube.com/playlist?list...
Please like,share,comment and subscribe our channel if you like our video
https://wn.com/Optical_Disk_|_Secondary_Storage_Devices_|_Computer_Fundamentals_|
Related Links-
HTET previous year solved questions playlist - https://youtu.be/zAgUlyUWOeQ
Data Structure playlist : https://www.youtube.com/playlist?list...
UGC NET 2019 solved papers topicwise- https://www.youtube.com/playlist?list...
DBMS MCQs for NET,GATE,HTET,ISRO and all competitive exams:- https://www.youtube.com/playlist?list...
C++ MCQs for NET,GATE,HTET,ISRO and all competitive exams:- https://www.youtube.com/playlist?list...
Please like,share,comment and subscribe our channel if you like our video
- published: 22 Jan 2021
- views: 66413
6:26
Why YOU NEED a CD-ROM Drive in 2023!
PS2 to USB adapter: https://amzn.to/3WVrAPN
DVD-ROM drive to USB: https://amzn.to/3X01A63
DVD-ROM drive (internal): https://amzn.to/48zpjAT
Universal Drive Adap...
PS2 to USB adapter: https://amzn.to/3WVrAPN
DVD-ROM drive to USB: https://amzn.to/3X01A63
DVD-ROM drive (internal): https://amzn.to/48zpjAT
Universal Drive Adapter: https://amzn.to/3Gw39TC
🌐 Web: https://www.HeineHouse.com
🤖 Discord: https://discord.gg/WuyknCf
✅ Patreon: http://www.patreon.com/JasonHeine
🎶 Music:
🥁 Spotify: https://spoti.fi/2OdeifP
📻 Web: https://www.heinehouse.com/music
🎧 Bandcamp: https://jasonheine.bandcamp.com
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📸 Instagram: http://instagram.com/HeineHouse
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🕖 TikTok: https://bit.ly/3b4ElRh
😊 Facebook: http://www.Facebook.com/HeineHouse
🎛️ Podcasts:
🎙️ Heine House Gaming & Tech: https://www.heinehouse.com/podcast
🎙️ All Gen Gamers: https://www.AllGenGamers.com
This video was directly supported by the following Patrons: George Filby, Erin Wilson, Brandon Zeller, Advent, Ryan Nagel, Cliff Boyd, Grant Everet, Steve Aker, Buried On Mars, Tim Adams, Mike Glotch, Rusty Lewis, Sammy K, WhoSteenOh, Chad Shaffer, Orarina Alice, Duke Magnum, Boooooossttttt, James Schmidt, Nathan Eshelman, Joel Hatting, and Koyosho!
#HeineHouse #emulation #playstation
https://wn.com/Why_You_Need_A_Cd_Rom_Drive_In_2023
PS2 to USB adapter: https://amzn.to/3WVrAPN
DVD-ROM drive to USB: https://amzn.to/3X01A63
DVD-ROM drive (internal): https://amzn.to/48zpjAT
Universal Drive Adapter: https://amzn.to/3Gw39TC
🌐 Web: https://www.HeineHouse.com
🤖 Discord: https://discord.gg/WuyknCf
✅ Patreon: http://www.patreon.com/JasonHeine
🎶 Music:
🥁 Spotify: https://spoti.fi/2OdeifP
📻 Web: https://www.heinehouse.com/music
🎧 Bandcamp: https://jasonheine.bandcamp.com
🎸 Apple Music: https://apple.co/35I7VbJ
📱 Social Media:
🎥 Twitch: http://www.Twitch.tv/TheHeineHouse
📸 Instagram: http://instagram.com/HeineHouse
🐦 Twitter: https://twitter.com/HeineHouse
🕖 TikTok: https://bit.ly/3b4ElRh
😊 Facebook: http://www.Facebook.com/HeineHouse
🎛️ Podcasts:
🎙️ Heine House Gaming & Tech: https://www.heinehouse.com/podcast
🎙️ All Gen Gamers: https://www.AllGenGamers.com
This video was directly supported by the following Patrons: George Filby, Erin Wilson, Brandon Zeller, Advent, Ryan Nagel, Cliff Boyd, Grant Everet, Steve Aker, Buried On Mars, Tim Adams, Mike Glotch, Rusty Lewis, Sammy K, WhoSteenOh, Chad Shaffer, Orarina Alice, Duke Magnum, Boooooossttttt, James Schmidt, Nathan Eshelman, Joel Hatting, and Koyosho!
#HeineHouse #emulation #playstation
- published: 01 Jan 2023
- views: 35701
36:45
How to clean an optical CD DVD drive that is not reading disks anymore
It ended up in a full tear-down... If you made it to put your DVD drive into work again, try using WinX DVD Ripper Platinum software to make a digital copy of y...
It ended up in a full tear-down... If you made it to put your DVD drive into work again, try using WinX DVD Ripper Platinum software to make a digital copy of your DVDs in 2023. Free download it here:
https://www.winxdvd.com/dvd-ripper-platinum/?ttref=2302-ytb-pt-DIY-incl-may
https://wn.com/How_To_Clean_An_Optical_Cd_Dvd_Drive_That_Is_Not_Reading_Disks_Anymore
It ended up in a full tear-down... If you made it to put your DVD drive into work again, try using WinX DVD Ripper Platinum software to make a digital copy of your DVDs in 2023. Free download it here:
https://www.winxdvd.com/dvd-ripper-platinum/?ttref=2302-ytb-pt-DIY-incl-may
- published: 30 Dec 2020
- views: 67303
14:37
Optical Media
In this video from ITFreeTraining, I will look at optical media. Optical discs have been around since the 70’s and gained a lot of market share in the 90’s. How...
In this video from ITFreeTraining, I will look at optical media. Optical discs have been around since the 70’s and gained a lot of market share in the 90’s. However, with the increasing use of online storage and storage such as flash memory, there has been a decline, but it is still something that you will come across from time to time.
Download PowerPoint: https://itfreetraining.com/handouts/ap/3c20.pptx
For the CompTIA exam, you most likely won’t get asked any difficult questions on optical media, if you get a question at all. So, I would not worry about memorizing the information in this video, just have a bit of an understanding. At the end of the video, I will cover what you need to know to support optical media in the real world.
Say ROM as Rom
The first optical media to take off in the marketplace was Compact Disc or CD. These were originally designed to store audio for music for use in CD players. Computers needed the ability to store data on a compact disc, so the standard was expanded to include data and was called CD-ROM.
These optical discs could store 650 Megabytes, which back then was a lot of data. For this reason, optical disc was widely used to distribute and backup data.
Optical discs have been around since the 70’s but did not get market acceptance. The other big optical disc standard attempting to gain market share was the laser disc. Although there were different sizes, the larger size was about the size of a vinyl record. They were designed with video in mind and stored about 60 minutes of video on each side, thus a total of about 120 minutes. This was enough space for some, but not all movies.
Although laser discs were popular for a little while in some countries, the technology quickly died out. It is unlikely that you will come across it nowadays. The big problem with CD-ROMs was they needed to store a lot more data in order to store decent quality video.
The original DVDs were able to store 4.7GB using a single side and single layer. By using both sides of the disc the amount of storage was able to be doubled. Also, using dual layer the storage was again able to be doubled. Dual layer is when the DVD is manufactured with a second layer that can be accessed by refocusing the laser to access the second layer. The problem with this is, tracking of the second layer takes a little bit of time and thus there may be a small pause during playback. Since this only happens when changing layers, it is usually not that noticeable.
You can see that a DVD could potentially hold 17GB of data which would be enough for high-definition video; however, doing this required both sides of the DVD to be used. Using both sides means that you can’t use one side to print information about what the DVD has on it and also the DVD is more prone to damage. For this reason, a new standard was required for high-definition video.
Description too long for YouTube. Please see the following link for the rest of the description. https://itfreetraining.com/ap/3c20
References
“The Official CompTIA A+ Core Study Guide (Exam 220-1001)” Chapter 6 Paragraph 199-221
“CompTIA A+ Certification exam guide. Tenth edition” Pages 429 – 435
“Picture: Optical discs” https://pixabay.com/photos/background-blu-ray-blank-burn-89176/
“Picture: CD ROM” https://en.wikipedia.org/wiki/CD-ROM#/media/File:CD-ROM.png
“Picture: Laser Disc” https://commons.wikimedia.org/wiki/File:LaserDisc.jpg
”Picture: DVD logo” https://upload.wikimedia.org/wikipedia/commons/9/9b/DVD_logo.svg
“Picture: Video Camera” https://unsplash.com/photos/SpDOwp6PnBs
“Picture: DVD disc” https://en.wikipedia.org/wiki/DVD#/media/File:DVD-Video_bottom-side.jpg
“Picture: Blu-ray logo” https://en.wikipedia.org/wiki/Blu-ray#/media/File:Blu-ray_Disc.svg
“Picture: Blue-ray disc” https://en.wikipedia.org/wiki/Blu-ray#/media/File:BluRayDiscBack.png
“Picture: HD DVD logo” https://upload.wikimedia.org/wikipedia/commons/a/a4/HD-DVD.svg
“Picture: Blue electronic” https://unsplash.com/photos/HdLYxUirwfI
“Picture: Ultra HD Blu-ray” https://en.wikipedia.org/wiki/Ultra_HD_Blu-ray#/media/File:Ultra_HD_Blu-ray_(logo).svg
“Picture: Laser lights” https://pixabay.com/photos/green-laser-light-rays-light-games-1757807/
“Picture:
Archival Disc” https://en.wikipedia.org/wiki/Archival_Disc#/media/File:Archival_Disc_logo.svg
“Picture: Archival” https://pixabay.com/photos/archive-files-register-office-3859388/
“Picture: Stack optical CD’s” https://pixabay.com/photos/blank-cd-rom-compact-disc-data-72140/
Credits
Trainer: Austin Mason http://ITFreeTraining.com
Voice Talent: HP Lewis http://hplewis.com
Quality Assurance: Brett Batson http://www.pbb-proofreading.uk
https://wn.com/Optical_Media
In this video from ITFreeTraining, I will look at optical media. Optical discs have been around since the 70’s and gained a lot of market share in the 90’s. However, with the increasing use of online storage and storage such as flash memory, there has been a decline, but it is still something that you will come across from time to time.
Download PowerPoint: https://itfreetraining.com/handouts/ap/3c20.pptx
For the CompTIA exam, you most likely won’t get asked any difficult questions on optical media, if you get a question at all. So, I would not worry about memorizing the information in this video, just have a bit of an understanding. At the end of the video, I will cover what you need to know to support optical media in the real world.
Say ROM as Rom
The first optical media to take off in the marketplace was Compact Disc or CD. These were originally designed to store audio for music for use in CD players. Computers needed the ability to store data on a compact disc, so the standard was expanded to include data and was called CD-ROM.
These optical discs could store 650 Megabytes, which back then was a lot of data. For this reason, optical disc was widely used to distribute and backup data.
Optical discs have been around since the 70’s but did not get market acceptance. The other big optical disc standard attempting to gain market share was the laser disc. Although there were different sizes, the larger size was about the size of a vinyl record. They were designed with video in mind and stored about 60 minutes of video on each side, thus a total of about 120 minutes. This was enough space for some, but not all movies.
Although laser discs were popular for a little while in some countries, the technology quickly died out. It is unlikely that you will come across it nowadays. The big problem with CD-ROMs was they needed to store a lot more data in order to store decent quality video.
The original DVDs were able to store 4.7GB using a single side and single layer. By using both sides of the disc the amount of storage was able to be doubled. Also, using dual layer the storage was again able to be doubled. Dual layer is when the DVD is manufactured with a second layer that can be accessed by refocusing the laser to access the second layer. The problem with this is, tracking of the second layer takes a little bit of time and thus there may be a small pause during playback. Since this only happens when changing layers, it is usually not that noticeable.
You can see that a DVD could potentially hold 17GB of data which would be enough for high-definition video; however, doing this required both sides of the DVD to be used. Using both sides means that you can’t use one side to print information about what the DVD has on it and also the DVD is more prone to damage. For this reason, a new standard was required for high-definition video.
Description too long for YouTube. Please see the following link for the rest of the description. https://itfreetraining.com/ap/3c20
References
“The Official CompTIA A+ Core Study Guide (Exam 220-1001)” Chapter 6 Paragraph 199-221
“CompTIA A+ Certification exam guide. Tenth edition” Pages 429 – 435
“Picture: Optical discs” https://pixabay.com/photos/background-blu-ray-blank-burn-89176/
“Picture: CD ROM” https://en.wikipedia.org/wiki/CD-ROM#/media/File:CD-ROM.png
“Picture: Laser Disc” https://commons.wikimedia.org/wiki/File:LaserDisc.jpg
”Picture: DVD logo” https://upload.wikimedia.org/wikipedia/commons/9/9b/DVD_logo.svg
“Picture: Video Camera” https://unsplash.com/photos/SpDOwp6PnBs
“Picture: DVD disc” https://en.wikipedia.org/wiki/DVD#/media/File:DVD-Video_bottom-side.jpg
“Picture: Blu-ray logo” https://en.wikipedia.org/wiki/Blu-ray#/media/File:Blu-ray_Disc.svg
“Picture: Blue-ray disc” https://en.wikipedia.org/wiki/Blu-ray#/media/File:BluRayDiscBack.png
“Picture: HD DVD logo” https://upload.wikimedia.org/wikipedia/commons/a/a4/HD-DVD.svg
“Picture: Blue electronic” https://unsplash.com/photos/HdLYxUirwfI
“Picture: Ultra HD Blu-ray” https://en.wikipedia.org/wiki/Ultra_HD_Blu-ray#/media/File:Ultra_HD_Blu-ray_(logo).svg
“Picture: Laser lights” https://pixabay.com/photos/green-laser-light-rays-light-games-1757807/
“Picture:
Archival Disc” https://en.wikipedia.org/wiki/Archival_Disc#/media/File:Archival_Disc_logo.svg
“Picture: Archival” https://pixabay.com/photos/archive-files-register-office-3859388/
“Picture: Stack optical CD’s” https://pixabay.com/photos/blank-cd-rom-compact-disc-data-72140/
Credits
Trainer: Austin Mason http://ITFreeTraining.com
Voice Talent: HP Lewis http://hplewis.com
Quality Assurance: Brett Batson http://www.pbb-proofreading.uk
- published: 24 Dec 2022
- views: 4923