Revit is slow or fails to open projects - Sector Size

Revit is slow or fails to open projects - Sector Size

On some modern Windows systems there is a newer setting that is not supported by the Revit SQL database. This causes Revit to freeze while loading a project or run very slowly.

How do I confirm If I am affected?
  1. Click on the start menu and type "cmd"
  2. Run "Command Prompt" as administrator
  3. In command prompt enter this command: fsutil fsinfo sectorinfo C:
  4. If the value for the below two items are greater than 4096, you are affected and have to implement the solution below.
PhysicalBytesPerSectorForAtomicity > 4096
PhysicalBytesPerSectorForPerformance > 4096

How do I resolve the issue?
  1. Download the attached zip file and extract it.
  2. Right click on the extracted file "SetSectorSize - Modena.reg", click on "Show more options" and click on "Merge"
  3. Allow the file to add a new entry to your Windows registry if prompted.
  4. Restart your PC
Can I check if the issue has been resolved?
To check that the registry entry applied correctly: Please open command prompt as administrator again and run the same command as before:  fsutil fsinfo sectorinfo C: , if the two values now show 4096 the fix has been applied correctly.

If you require more information on the problem and it's solution, please read this article:


For more support with Autodesk products contact:
Modena Technologies - your Platinum Autodesk Partner


Phone: (+27) 021 794 0702

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