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UDF Format DVD

RVT02 Posted messages 43 Registration date   Status Member Last intervention   -  
RVT02 Posted messages 43 Registration date   Status Member Last intervention   -

Hello,

I recently reinstalled Windows 7, even though Windows 10, 11, ... are strongly recommended.
Since then, I have a problem reading my burned DVD - RW (from my previous Windows 7) with Nero that contain one or more mkv files larger than 2GB in UDF format.
With the newly installed Windows 7, the DVD drive/burner of the computer no longer recognizes this type of inserted UDF DVD; the explorer shows empty content, no files present on the DVD.
However, these DVDs are not empty, and they are perfectly accessible and visible on another computer.
Did I miss something during the Windows 7 reinstallation for the UDF format to be recognized, even though the hundreds of Windows updates have been installed, but perhaps not those necessary for UDF since Windows Update is no longer updated?
How can I restore my computer's DVD drive/burner to recognize UDF format DVDs?
Is there a UDF codec to download?

Thank you in advance


4 answers

  1.
    Redbart Posted messages 20952 Registration date   Status Member Last intervention   3 381
     

    Hello
    Win7 Pro or Home, x32 or x64?

    The versions serve different purposes.

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    1. brucine Posted messages 24980 Registration date   Status Member Last intervention   4 180
       

      Hello,

      The bug seems to be specific to Windows 7 regardless of the version, and it is reported to occur whenever CDs or CD/RWs have been burned not only on another operating system but on the same one once it has been reinstalled: it appears as if the structure of the burned file is specific to a particular installation.

      The proposed solution (link for the UDF driver update for Windows 7 at the bottom of the link to follow) fails regularly.

      In this scenario, there seems to be no other solution than to migrate the PC to Windows 10 or, if one has another machine, to mount the files in question there to copy them onto the Windows 7 PC and burn them again as if it had never been done, but without stating whether the problem will not recur if they are to be read on another operating system.

      https://social.technet.microsoft.com/Forums/windows/en-US/4d6fcf48-6f07-44db-867d-4b5c209f1bc9/about-reading-a-udf-formatted-disk-in-windows-7?forum=w7itprohardware
       

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  2. RVT02 Posted messages 43 Registration date   Status Member Last intervention   2
     

    Hello Redbart, my Windows is a Windows 7 PRO 64 bits.

    Thank you brucine for this link that helps to better understand the problem.
    What I can try is to install the patches to maybe fix what Windows Update, cut off by stopping certain updates, hasn't installed.
    I can also indeed copy from another computer the content of my DVD - RW onto a USB stick and transfer it to my computer since the problem encountered doesn't appear with the UDF burning of a file present on a USB stick or in the internal hard drive of the computer.
    What I don't know is which UDF format (manually selectable) Nero used (automatically) when burning my DVD - RW, as apparently there is UDF 1.02, 1.50, 2.00, 2.01, 2.50, 2.60 and maybe a specific version is required for a DVD burned on another computer to be accepted on my newly reinstalled computer (burning a UDF file present on my computer poses no reading issue, so it remains to see if it is due to a specific setting in Nero for UDF since there is 1.02, ... or 2.0 , ... or 2.60 ?)
    Another solution would be to disconnect the internal hard drive, replace it with another one on which I try to install my Windows 7 PRO again and test as soon as the installation is done (first without, then with Windows Update) if my DVD - RW work. If it works, immediately make (what I should have done long ago) a disk image to have a functional file for any future reinstall of Windows 7 PRO.

    I will test all this ...

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  3. RVT02 Posted messages 43 Registration date   Status Member Last intervention   2
     

    Following my research:
    the patches are no longer available for download, but that probably wouldn't have resolved the issue anyway.

    I don't know how to view the order of the main volume descriptors of a UDF-formatted DVD as shown in the link, but I tried copying the mkv file from my DVD - RW to a USB drive from another computer, saving that file on my computer, then burning it onto a DVD - RW in UDF, and comparing the files byte by byte in hexadecimal: result, no differences detected between the DVD files!!!
    And yet the original DVD - RW (burned with Nero in UDF on my previous Windows) is not recognized, whereas the DVD - RW burned with the same version of Nero in UDF on my reinstalled Windows is recognized.
    So there is a difference, but where, because in hexadecimal the files of the DVD - RWs are identical: Mystery!

    Next step before disassembling and reinstalling Windows on another hard drive: burning a DVD - RW in UDF with Nero on a third-party computer while testing the burns in different UDF modes 1.02, 2.0, 2.50 and checking if they are readable on my computer.

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  4. RVT02 Posted messages 43 Registration date   Status Member Last intervention   2
     

    Continuation and conclusion:
    File burned on DVD - RW from another computer in UDF 1.02, 2.0, 2.50, result: unreadable on my computer!

    Before attempting to reinstall Windows on a hard drive I had available, I tried deleting the DVD/CD Rom drivers and the ATA/ATAPI IDE controller drivers.
    After rebooting and allowing Windows to automatically reinstall the drivers, everything went back to normal; my "old" DVD - RW discs are readable again, as well as the "recent" ones from another computer, regardless of whether they are UDF 1.02, 2.00, or 2.50.
    Problem solved, laborious but ultimately a simple remedy.

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