How to repair a damaged DVD
Many people prefer to save important information (photographs, work files and other documents) on DVDs. As such, they do not have an expiration date, but, nevertheless, due to any mechanical damage, they fail. The reasons may be the most commonplace:
scratching physical deterioration; low quality of the material from which the disk was made.
Reading and copying information in such cases is impossible, but there are ways and programs to help deal with this problem.
Two main types of possible problems should be distinguished: logical malfunctions and surface damage, as a result of which a damaged DVD finally ceases to work, if the damage is really large-scale, then something is difficult to do.
This method is implemented with the support of specific software, not only in manual but also in automated mode.
In the process of using the software, the entire information layer contained on the medium is first scanned. Based on the results of the scan, on the basis of the discovered overhead information, a so-called “map” of information location is formed. The “map” provides information about which particular cluster refers to which of the files or directories, dimensions, names and all other characteristics of the elements of the scanned file system.
After that, information is restored – the selected data is transferred to another medium. Recording to the original medium during information recovery is not performed.
Before using any software, it is advisable:
repair a damaged surface as much as possible;
after polishing to neutralize scratches on standard or specific equipment, a full copy is removed.
Then, depending on the state of the final copy and the method of obtaining it (for example, preliminary decoding may be necessary), all the necessary information is sampled directly.
Utilities available today, using special mechanisms for reading information, ultimately are able to either read files or copy them (although they cannot guarantee absolute recovery of each of them). These programs have the ability to read information from disks of any format, using direct access and bypassing the standard, inefficient in this case tools that are typical of the Windows system.
They make many attempts to read the “damaged” segment of the disk, while being able to continue reading or copying data after errors appear during the reading process. This quite often makes it possible to “pull out” information in its primary form. In the event that such a method does not work, then the vast majority of the presented utilities are simply able to replace “non-working” sections with zeros. Of course, in this place of the document, as a result, some kind of defect is formed. Among the utilities that can restore a DVD should be identified:
The last of them produces a full-fledged scan of failed disks and reserves the maximum possible amount of data. Performing recovery, Recovery ToolВox uses a significant number of various operations, and this many times increases not only the quantity, but also the quality of the information being restored. Thus, it will be indispensable in situations such as:
damage to the physical plane carrier (namely, scratches, contact with liquids);
changing the disk format by data recording utilities;
operating system error while reading and accessing media.
Some of the file categories should take into account their features. For example, if we talk about a video file, then the program should be able to correctly restore the index of this file, while noting its damaged sections. This is done so that subsequently the player can play this video file, and the lost frames were painted in a certain shade.
In addition, different programs also have different recovery processes, and therefore, if it turned out to be impossible to restore something in one application, then most likely it will work out using another.
If the disk is not damaged too much, you can try a method such as reducing the read speed of the drive. This may turn out to be effective, because at high speed the PC may simply not perceive the information that was not damaged. You can also consider a damaged disk in various drives from various manufacturers, each of which, accordingly, has its own speed.
With minimal damage, the use of a special polishing gel, which will restore the coating, can also help. It is advisable to do all this using a microfiber cloth.