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Description |
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A problem occurred in the file system, possibly due to disk data corruption or a hardware problem. This is a fatal Windows error, typically called a Stop message, Bug Check, or more commonly the Blue Screen of Death (BSoD). The system is in a forced reboot state. Any unsaved work is likely lost.
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Sample Screen |
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A problem has been detected and Windows has been shut down to prevent damage to your computer.
UDFS_FILE_SYSTEM If this is the first time you've seen this Stop error screen, restart your computer. If this screen appears again, follow these steps:
Check to make sure any new hardware or software is properly installed. If this is a new installation, ask your hardware or software manufacturer for any Windows updates you might need.
If problems continue, disable or remove any newly installed hardware or software. Disable BIOS memory options such as caching or shadowing. If you need to use Safe Mode to remove or disable components, restart your computer, press F8 to select Advanced Startup Options, and then select Safe Mode.
Technical Information:
*** STOP: 0x0000009B
Beginning dump of physical memory
Physical memory dump complete.
Contact your system administrator or technical support group for further
assistance. |
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Text may appear differently depending on where the error occurs.
Additional technical information (hex values) specific to a machine are not shown. |
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Key Facts |
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Full Title |
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UDFS_FILE_SYSTEM
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Stop Code |
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0x0000009B
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Type |
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Fatal
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Windows |
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2000, XP, Vista, 2008, 7, 8
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Vendor |
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Microsoft Corporation |
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Solutions and Fixes |
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Data and/or file structures on the drive may be corrupt. Run the check disk program or other disk validation and repair utility on the drive. To do this:
- Open Explorer or My Computer (Press Windows+E).
- In the right pane, right-click on the drive you want to validate and select Properties.
- Select the Tools tab.
- Under Error-checking, click on "Check Now".

- In the next dialog, make sure the option "Automatically fix file system errors" is checked. If you want a more complete validation and repair check the option "Scan for and attempt recovery of bad sectors" (although this takes considerably longer to complete).

- Click on Start.
Several software products that offer an extensive range of disk diagnostics includes Fix-It Utilities Professional and SystemSuite Professional. Other diagnostic products include Eurosoft's PC Check and Iolo's System Mechanic. |
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FaultWire Staff
Posted: 5-Oct-2008 |
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The operating system or application may have run out of usable memory.
Adding additional memory may solve this problem. This is especially true if your system is configured for a minimal amount of memory for Windows. |
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FaultWire Staff
Posted: 5-Oct-2008 |
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Check Hard Disk and Cables |
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If you had changed, added or removed hard drives, or changed or removed drive cabling, likely something is wrong. Recheck that the drives are properly installed and the cabling has not changed. Switching cables to different motherboard connectors or changing the master/slave drive jumpers (on old ATA drives) can cause this problem. In some systems, the cables were not plugged into the drive or motherboard securely and may have worked loose. Reseat all drive connectors.
It's also possible a hard drive is failing. Use a system diagnostic to validate the drive or swap to another hard disk.
Several software products that offer disk diagnostics includes Fix-It Utilities Professional and SystemSuite Professional. Other diagnostic products include Eurosoft's PC Check and Iolo's System Mechanic. |
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FaultWire Staff
Posted: 5-Oct-2008 |
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Fix the Drives or Disk Controller |
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The hard disk or disk controller may be failing and creating errors or problems that the driver cannot handle.
Check that the cabling is plugged in securely, and if using SCSI drives, make sure the drive cables are terminated properly. You might remove the drive and test it non-destructively on another system. Also note if the system works either when first turned on (i.e. cold) or if it requires the system to be on for a while (i.e. hot). This is an excellent clue that you have a thermal hardware problem. |
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FaultWire Staff
Posted: 3-Dec-2009 |
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Check if you are using the latest hardware drivers, especially the chipset and video drivers. Older drivers are a common contributor to BSoD issues.
You can use a product like Driver Genius or Radar Sync to verify you have the latest drivers and help keep all your drivers up-to-date. If you're comfortable with driver installations, you can individually find and install current drivers.
A some of the most popular driver download sites:
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FaultWire Staff
Posted: 5-Oct-2008 |
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Also see our list of common Fatal Error Solutions. |
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Forum Help |
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Check out what others say about this issue and review or add your own comments and solutions!
Go to Forums on topic. |
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Technical Details |
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 A problem occurred in the UDF (Universal Disk Format) file system.
After the Stop code will be 4 hex values: {Parameter 1, Parameter 2, Parameter 3, Parameter 4}.
Parameter 1 specifies source file and line number information.
Parameter 2 specifies the address of the exception record, if UdfExceptionFilter is on the stack.
Parameter 3 specifies the address of the context record, if UdfExceptionFilter is on the stack.
Parameter 4 is not defined.
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Vendor Summary |
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While BSoD fatal stop errors are identified by Microsoft Windows, they are often caused by
non-Microsoft applications, drivers and hardware issues. |
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Research this Issue |
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Getting search results...
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Notes |
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While we believe this information up to date and accurate, FAQware is not responsible for any inaccuracies. If you find something that is out of date or inaccurate, please let us know at
so we can correct it. |
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