The error code 0x0000009B is associated with the bug check message UDFS_FILE_SYSTEM in Windows. This indicates a problem with the Universal Disk File System (UDFS) used to read and write data on optical discs like DVDs and Blu-rays.

Here’s a breakdown of the error and potential solutions:

Understanding UDFS_FILE_SYSTEM:

• UDFS is a file system specifically designed for optical discs. It allows for features like longer filenames, directory structures, and support for large file sizes compared to older file systems like CD-ROM (ISO 9660).
• The 0x0000009B error signifies that the Windows kernel encountered an issue while trying to access or manipulate data on a UDFS disc. This could be due to various reasons.

Causes of UDFS_FILE_SYSTEM:

• Corrupted Disc: Physical scratches, defects, or dust on the disc can lead to read errors that trigger the UDFS_FILE_SYSTEM error.
• Data Corruption: Corruption within the UDFS file system on the disc itself can cause problems accessing files or directories.
• Software Bugs: Bugs in the UDFS driver or other system components might lead to misinterpretations of data on the disc.
• Hardware Issues (Less Likely): In rare cases, hardware problems with your DVD/Blu-ray drive might contribute to read errors.

Troubleshooting Steps for UDFS_FILE_SYSTEM:

Here are some steps you can take to try and fix the 0x0000009B error:

1. Clean the Disc:

   • Gently wipe the disc with a soft, lint-free cloth to remove any dust or fingerprints that might be causing read errors.

2. Try a Different Disc Drive:

   • If you have another DVD/Blu-ray drive available on your computer or another system, try using that to access the disc. This can help isolate if the issue is with the specific drive or the disc itself.

3. Update Drivers:

   • Update the drivers for your DVD/Blu-ray drive to ensure you have the latest bug fixes and compatibility updates. You can usually find drivers on the manufacturer’s website for your specific drive model.

4. Run System File Checker (SFC):

   • Open Command Prompt (Admin).

   • Type the following command and press Enter:

     <code data-test-id="code-content">sfc /scannow
     </code>

   • This command scans your system files and attempts to repair any corrupted files related to UDFS drivers or file system access.

5. Check System Logs (Advanced Users):

   • Event Viewer can be used to access system logs that might contain more details about the UDF error. While deciphering event viewer entries can be technical, investigating logs around the time of the error might provide clues about the driver involved.

   • Look for entries mentioning “UDFS” or “BugCheck 0x9B” in the system logs.

Additional Tips:

• If the disc is known to be scratched or damaged, consider trying a different copy of the disc (if available).
• For data corruption issues, you might be able to recover some files using data recovery software, but success depends on the severity of the corruption.

Seeking Help:

If none of these solutions work, and you’re unable to access the data on the disc, consider seeking help from a data recovery specialist. They might have specialized tools and techniques to attempt recovering data from corrupted discs.