When i try to get physical sector size via DeviceIoControl i receive Access is denied

  • 1 year ago
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Getting the physical sector size using DeviceIoControl requires administrative privileges, as it involves interacting with low-level system information. If you are receiving an "Access is denied" error, it's likely due to insufficient privileges. To resolve this, you can follow these steps:

  1. Run as Administrator:
    Ensure that you are running your application with administrative privileges. Right-click on the application or command prompt and select "Run as administrator."

  2. UAC Prompt:
    If User Account Control (UAC) is enabled on your system, even administrators might need to confirm their actions. When prompted, confirm the UAC elevation.

  3. Use Elevated Command Prompt:
    If you are working with a command-line application, make sure to open an elevated command prompt by right-clicking the Command Prompt and selecting "Run as administrator."

If you continue to encounter issues even after ensuring administrative privileges, there might be other factors at play. These could include system policies, group policies, or security software that restricts access to certain low-level system functions.

If you are still having trouble, consider the following steps:

  • Double-check your code to make sure that the DeviceIoControl call is correctly set up and that you're passing the right parameters.
  • Temporarily disable security software to see if it's causing the access issue.
  • Test the code on a different machine to see if the issue is specific to your system.

Remember that working with low-level system functions can have implications for system stability and security. Always exercise caution and test your code in a controlled environment before deploying it on production systems.