2,787 questions
DeviceIoControl API failure in latest windows 10 OS while querying a bitlocked USB with control code: IOCTL_DISK_IS_WRITABLE
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Sachin Jose
61
Reputation points
I have an MFC application which was created using windows SDK version 10.0.17763.0. Basically the application was deployed in Windows 10 1909 build(LTSC 2019). I have used DeviceIoControl API to check whether the drive is writable. In 1909 windows version the API was successful, but when I use the application in latest windows version(21H1/21H2), the API fails and return GetLastError value: FVE_E_LOCKED_VOLUME, which has the information "This drive is locked by BitLocker Drive Encryption. You must unlock this volume from Control Panel.".
I am not exactly looking for a solution to the API failure, but trying to find out from which windows 10 OS version this behavior has started. As I am using 10.0.17763.0 windows SDK version to build the application, and the same application is used in both old and latest windows version. Can you suggest an explanation for this, what happened to the behavior ?
Windows development | Windows API - Win32
Developer technologies | C++
3,977 questions
{count} votes
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Junjie Zhu - MSFT 21,646 Reputation points2022-05-02T06:19:24.213+00:00 I did not reproduce your situation, in latest windows version(21H1/21H2).
Could you provide a code sample of how you are using the DeviceIoControl API? -
Sachin Jose 61 Reputation points
2022-05-03T04:17:51.633+00:00 @Junjie Zhu - MSFT - I have attached the sample console application code that I have written to test above scenario.
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Junjie Zhu - MSFT 21,646 Reputation points
2022-05-04T07:27:57.717+00:00 Is this a normal result？
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Junjie Zhu - MSFT 21,646 Reputation points
2022-05-04T07:32:13.157+00:00 Would you mind showing your test results?
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Sachin Jose 61 Reputation points
2022-05-04T11:13:35.86+00:00 
This is my test result.
What is your windows version ? Did you use a bitlocked USB ?My preconditions:
- Windows version - 21H2
- USB is bitlocked and in lockd state.
Observations:
- API always fails when USB is bitlocked
- API success when USB is unlocked or no bitlocking is used.
- API always success when Windows 10 1909 build is used.
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Junjie Zhu - MSFT 21,646 Reputation points
2022-05-05T01:58:43.603+00:00 Windows version: Windows 11 Enterprise 21H2 22000.613
bitlocked USB: Yes
Could you try usePHYSICALDRIVE1?
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