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131

… using a commercial replication process. This process involves creating a Glass Master. Discs are not burned in the sense of punching holes into a recordable surface. They are rather "pre-recorded", by pressing them. This procedure only pays off for large quantities of CDs/DVDs produced. It also requires a very clean room (said to be 100 times cleaner than ...


57

It's mostly a technical limitation. Put simply, if you spin the disk too fast it starts to become unstable and wobble around or even start to come apart under the sheer stress. At best this means read/write errors - and at worse means the possibility of it coming loose and causing damage. At 52x speed, the disk is spinning at around 24000 RPM - at around ...


32

Does a scratched DVD result in lost data? Not necessarily. The data is not actually stored on the surface of the disk - it's actually stored more towards the center. There is a protective layer of plastic-coating (polycarbonate) surrounding the data. How do I fix a scratched DVD? If only the protective layer is scratched, it can be filled in ...


23

Right click on the Computer icon on the Desktop and select Manage option. Select Storage > Disk Management. Right click on the CD/DVD icon in the bottom panel and select "Change Drive Letter and Paths..." Change the letter and select OK.


22

The danger is that there could be a chemical reaction between the components of the marker's ink and disk's surface. Some "permanent" markers are quite aggressive, and while the damage is not immediate, it could happen over time. Council on Library and Information Resources says in their report: Numerous CD vendors have noted that the thin protective ...


20

1.yes but not completely It will depend on how much it is scratched . If it is negligible just ignore it . If it is in the moderate level some utility programs may help you . If it is in very high level no hope , (still you may can recover some data if you have luck :) ) 2.Try your luck using following apps CD Recovery Toolbox Free CD Recovery Toolbox ...


17

The original DVDs (and CDs) are not burned, but instead pressed - this is a completely different process which requires larger (and more expensive) machinery, but is not as cost-intensive per medium. More information can be found in this Wikipedia article: Compact Disc manufacturing It also contains a nice external link: How compact discs are made -- ...


16

I wrote LockCD application after giving up on finding a properly functioning software that would lock the CD ROM eject button which i hit quite frequently on my Lenovo T520 laptop. The main problem with the software found over the internet was that it wouldn't retain the lock state after Sleep/Resume. I made it freely available at ...


15

KenWood has played with CD-ROMs that use multiple lasers to read several places on the disc at once and then re-compose them into a single stream in firmware. They call this technology TrueX. You're able to read data faster at the same spin rate, but you need to use a more powerful laser (since it's being split), which requires more power and results in more ...


14

About a decade ago there were CD drives that used multiple laser beams to read 7 tracks at once for higher performance without having to spin the disk extremely fast. However they were expensive and apparently had reliability problems as well. It's also worth noting that it isn't just a question of structural integrity of the disk at high RPMs, but also of ...


14

Put a disk into the drive, wait until OS X mounts it, and then type the following command in the Terminal: $ mount [⋮] /dev/disk2 on /Volumes/MyDisk (cd9660, local, nodev, nosuid, read-only, noowners) In my case, the drive is located at /dev/disk2. You can use drutil as well. # drutil status Vendor Product Rev MATSHITA DVD-R UJ-857D ...


11

At the command line: eject -i 1 To return to normal: eject -i 0 Or you can software eject it using: eject In all cases, you can add a device name if you have more than one ejectable device. Apparently, this doesn't work with all versions of eject. If it doesn't with yours, you can bypass eject completely and do it the "hard" way: echo 1 | sudo ...


11

The El Torito CD-ROM standard is an extension to the ISO-9660 spec that allows booting from CD. Some OS installation cds, Windows is one example, use these extensions to make installing an operating system easier for the user. Your computer is probably configured to check the CD-ROM drive each time the system boots for a bootable CD. Many CD burning ...


9

The thing with Apple notebooks is that it's easy to produce one enclosure to fit several (or almost all) models, because it should seal the slot perfectly. However, there is an enclosure for your model at newmodeUS, which comes at $44.75. Add a Second Hard Drive (drive size up to 12.7mm in height) to your Asus N43, N53, N61, N71 or N81, N82 Series ...


9

A standard (internal) SATA cable should be required, Wikipedia has a picture (the required cable is on the left): This will connect to the one of the yellow SATA ports shown on the bottom left (from GigaByte's webpage for the GA-P43-ES3G):


8

1- Yes, all DVD/CD are burned using a digital redundancy technique. On DVDs I know that Reed-Solomon code is used: Reed–Solomon codes have since found important applications from deep-space communication to consumer electronics. They are prominently used in consumer electronics such as CDs, DVDs, Blu-ray Discs, in data transmission technologies ...


8

Check out these MSDN pages on windows API for the IBurnVerification interface, and the IMAPI_BURN_VERIFICATION_LEVEL enum. For data disks it looks like in quick mode it doesn't checksum the entire disk, just a selection of sectors. It then makes sure that the API calls READ_DISC_INFO and READ_TRACK_INFO succeed. For full verification, it performs the ...


7

Good definition of the CD-ROM cable here A cable used to send audio CD sound to the computer's sound card. When playing audio CDs, CD-ROM drives output analog sound to both a headphones jack and external connector just like a CD player. This method is still the way audio CDs are played on a computer, but it was the only method available on ...


7

I had this happen to me, only worse when I learnt the hard way not to put miniCDs into slot-load CD drives! I tried the below things, and eventually managed to get it out. Admittedly some of these have potential to get you into a worse mess than you already are :P Inserting a piece of cardboard with double-sided stickytape to try and stick to and pull out ...


7

Add my 2 cents here. I have been using Sharpie brand markers to label discs for years. Never saw any effect either short term or years after. I have even used isopropyl alcohol to "erase" the markings. However, I do generally write fairly lightly so as not to scratch the surface and force the solvent deeply into the top coat. Having said that, different ...


6

Scratches on the bottom (clear) portion of the disk cause data read errors by interrupting the laser beam's path to the data. The actual data may still be intact, just unreachable (think overwriting words on a page with a black marker, the words are still there but not visible.) Such scratches may be filled in or polished out using various ...


6

Considering the cost of a DVD writer? Replace it, take apart the old one and find out. I do note it sounds like it isn't closing all the way, something is jammed and its trying to eject to remove what it percieves to be a stuck disk. Unfortunately, the only way to really find out is to take it apart since this is usually a mechanical issue. Look for broken ...


6

Crash Course When the computer is turned on, the BIOS (which is "just" another program, which is the first one run) is read into memory and executed by the CPU. (I have no idea how this is done, sorry.) It then performs any preparations or tests needed, according to the settings which are set up. Those settings (which are incorrectly sometimes called "the ...


6

There are two datacables out there, IDE aka PATA and SATA. Your DVD-Writer is an IDE one, and the pictures from Google tell me that your Motherboard has IDE-Sockets, so there you go.


5

I am going to thank Kio Dane again for taking the time out to post an answer to this question. Not being able to find any means to eject the disc, I decided to reboot the system. As I was shutting down open applications, I noticed that as soon as I quit VMware Fusion, the disc automatically mounted. I could eject it subsequently, as well. Apparently, VMware ...


5

You can always stick a fine allen key or unfolded paper clip into the little hole (usually just under the tray): This image is apparently of the Inspiron DVD drive and you can see the hole on the right next to the button:


5

15 years back... "Will there ever be floppy disk with capacity more than 1.44 M?" "Will there ever be floppy disk with higher read/write speeds?" (For those who incase don't know, what floppy is: http://en.wikipedia.org/wiki/Floppy_disk) Today, we don't care for an answer to above questions, simply for the fact that 'flop'pies have flopped. Now, even ...


4

tldr; version: No. But if you do then use your old Asus DVD drive in an external case with power supply. Long version: 1) If you get an external enclose for a previously internal SuperDrive then check the power needed to run this drive. It might (will) be more than your external case supplies if it is just powered via USB. Some numbers: External USB1 ...


4

Frank nicely explained the Windows-specific verification. I’ll give a more general answer. What does Verify disc after burning actually do to verify the data? I mean, does it create a hash of the source and destination content and then compares them? If it is so, does it store the hash of the burned content in RAM? Or does it save it in a temporary ...


4

In general, unless the design allows for it you should not add/remove printed circuit cards while there is power to the backplane. You might get away with it 9 times and get unlucky the 10th and burn out the card, due to the order that the circuit board pins made contact. And this of course says nothing about what happens to the logical state of the OS. ...



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