UDF – это специализированная файловая система, which is independent of OS and is intended to store files on different media. It should be noted that UDF is an implementation of the ISO / IEC 13346 standard, and it was designed to become a full-fledged replacement for ISO 9660.
Универсальность, а также возможность use in various operating systems provides for the use of this file system, not only when recording any optical discs, but also when processing other removable media, among which is to allocate portable hard drives, as well as all kinds of flash drives.
The UDF file system provides an opportunitysubsequently additionally write files to CD-R or CD-RW discs on a single file, without causing a loss of disk space. In addition, this file system allows for the possibility of selectively erasing certain files on rewritable media, allowing later to free up disk space.
The metadata of the file system, including the root directory, can be located in any sector of the disk, but the root itself is located directly in sector 256 or 257.
It should be noted that the UDF file systemIt is also provided for DVD-carriers, since it has better support for large volumes. In other words, unlike similar file systems, there are no restrictions on recording 2 GB or 4 GB. It is possible to use fragmented files.
After its development, the UDF file system becamequite common, as a result of which it was constantly improved and updated. Thus, over time, several different versions of it appeared:
Originally this version was developed forTo ensure a more efficient DVD recording with multimedia files. This operating system is supported by Windows 98, as well as many versions of operating systems from Apple. It is possible to use DVD-RAM, as well as magneto-optical disks.
The file system UDF of this version is different fromprevious in that there is support for virtual CD and DVD-R rewriting with the introduction of the Virtual Allocation Table technology. In addition, special backup file tables were introduced into the system, which made it possible to determine the presence of any damage on rewritable optical media. This file system was already supported in Windows 2000, Linux 2.4, as well as the increasingly popular Mac OS 9.
Slight improvement of the previous versionis to support streaming files, as well as real-time files during DVD burning. Among other things, with the introduction of this version, the UDF file system has become easier to manage directories, and also significantly expanded the support for VAT.
After the introduction of version 2.0 was found a huge number of different errors. It is for this reason that in 2 years version 2.01 was released, in which the majority of errors were completely corrected. It is also worth noting that in this version a fairly large number of ambiguities of the standard was explained. The version is supported by Windows XP.
A major file system update thatbrought it to a whole new level. UDF now has a metadata section that facilitates the overall grouping of metadata. In addition, this file system has become much more secure, since the procedure for recovering information and the optional duplication of file system data has been significantly simplified. The system works with Windows Vista and higher. It is worth noting that if you are using Windows XP or an earlier version, then in this case you may not open this UDF file system. What is it? The simple lack of support for the OS.
This version provides pseudo-rewrite technology on discs on which sequential data recording was performed. Supported on Windows Vista and higher.
It is worth noting that in the process of developingprovides for even greater expansion of the volume that will support the UDF file system. What will it be? No one can say yet, but it is known that in the future it will be possible to use this file system for very large hard drives as well as various holographic media.
Windows XP operating systems provide forThe ability to support this file system in versions from 1.02 to 2.01 for reading. With the help of specialized utilities, it will be possible to work with various CD-RW discs or DVD-RW in the same way as with standard large diskettes. In other words, you can write, read, delete and rename files, that is, directly carry out with them various available operations in an interactive mode without the need to introduce specialized commands. If we consider the operating systems Vista and 7, then they also have regular tools that allow the use of optical media in an interactive mode.
Also, the file system is actively supported inOS Linux. In order to create a disk with such a system, almost all modern versions of programs that are needed to create images can be used. If you use udftools, then in this case it will be possible to even format the disks in this file system, and then use them similarly to large diskettes.
Although the file system is UDF 2.01 and other versions appeared quite a long time ago, until today there is no actual replacement for it, so it is very, very popular.
UDF format is optional for CD-ROM, butif it is a DVD recording, then its use is more than relevant. Of course, DVD is also often written in the ISO standard, but in fact, any expert will say that it is much better to use the UDF file system for this. Than to open such files, not everyone knows, but in fact there are no difficulties in finding the corresponding utility on the Internet.
For example, you already have somerecorded RW disc. What can you do with it after this? If the disk still has free space, then you can fill it with new files, and if the disk is already full, but you want to write something to it, you will have to completely erase all information from it and rewrite him again. All this takes a fairly large amount of time, and also forces you to completely remove all information from this medium.
You can also give another example.If any reports are stored on your disk, then for the subsequent recording of a new version of the report you will need to re-create the session. At the same time, as we know, after the session is overwritten, the files of the old will continue to remain on the disk and, accordingly, occupy free space, as a result of which it may turn out that only one single file is placed on the disk, the size of which is 1 MB, but this is no longer free space, as it occupies all previous sessions.
It is for this reason that if you want to workwith your disks as with standard winchesters, then in this case you should use the UDF file system. How to open such files, it is easy to know, and the volume of such programs for downloading is small.
So using this file system,you can easily delete files, after which they will be physically erased from the disk and will not occupy its volume. In other words, to free up free space on the disk, you will not need to format it completely - just enough to erase some unnecessary data.
It is quite simple to create a disk that will use the UDF or ISO file system - the Nero Burning ROM program, which is popular these days, can be used for this:
После того как вы запишите диск таким образом, all restrictions specific to the ISO file system will be completely removed. However, one small remark remains, which, however, confuses the few - the disc can be called exclusively in capital letters, and its length should not be more than 32 characters. Also does not provide for the use of spaces.
The latest versions of this program providethe ability to use the ISO / UDF format, that is, you can work with it even when using not only the UDF file system. Will a DVD be read in this format by a computer? Of course, yes, if you use a modern operating system.
In order to make such a disc, you needin the New Project window, select DVD-ROM (ISO / UDF) or CD-ROM (ISO / UDF), which are the last in the list of formats. Such a disk combines the directory structures of each of the considered formats.
It is worth noting that the record in mixed formatis quite optimal and not bad for storing files. In this case, the creation of such a medium is similar to the creation of a standard data disk.
Since the disk will be usedat the same time two file structures, it will have a slightly smaller usable capacity compared to the usual one, since the two structures require a larger amount. That is why, if a CD or DVD is being recorded, but in full, it is better to use just the UDF file system. How to write, we have already figured out, now we need to understand how to open such files.
Problems with opening the file system is oftenfound in modern users. You can often encounter such a situation that, for example, a file with music is sent over a file, which indicates the UDF file system. Will the head unit read such a file? How to open it? For those to whom this file system is unknown, many questions open up.
Чтобы открыть сам файл, в современных Operating systems are often simply double-clicked on it, after which the OS will choose which program to use to open it. If you cannot open your file, then in this case there can be such a situation that your computer does not have the application program you need, which allows you to open or edit files with this permission.
If your computer opens the file, buttrying to use the wrong program for this, in this case you will need to make changes to the file associations in the Windows registry. The problem here is that Windows considers files with this extension to be incorrect programs.
In the event that your computer does not exist at allprogram, which could open this extension, you will need to download it. Among the programs with a nice and simple interface, you can select FileViewPro.
