Win32 C++ detect USB-drive corruption
I am working on a kiosk application using Windows 7 as the OS, and Win32 C++ to detect and manage USB drives. We just found a bug where, if a USB is corrupt in some way, the OS will pop up the following dialog which is hidden behind the kiosk application and therefore never gets shown.
When a user goes to copy to this drive, the application crashes.
I have been looking for a way to detect when I get a USB DBT_DEVICEARRIVAL notification whether or not this newly added USB is corrupt, but haven't come up with any good possibilities. What I have come up with is the possibility of calling DeviceIoControl() and passing IOCTL_DISK_GET_PARTITION_INFO as the control code, since the PARTITION_INFORMATION structure returned can tell me whether the partition type is recognized or not. But this doesn't necessarily tell me whether the USB is corrupt. I assume this is more likely to tell whether this is a recognized NTFS format, as opposed to a format written by a Linux or Mac system.
Can anyone tell me how I could go about detecting corruption in a newly added USB drive, so that I can take the necessary next steps?
One more thing. I've tried to purposefully create a corruption on my USB drive so that I can emulate the issue found by our user, but Win7 seems to be smart enough to stop me from doing that. Does anyone know of a way to create a corrupted USB drive for test purposes?
You're incorrectly relating this to USB. Instead, it's a volume flag. Obtaining this status is possible via WMI, for example. See Win32_LogicalDisk.VolumeDirty - if TRUE, then disk requires chkdsk. Once you know the volume requires repairing, you can run chkdsk.exe from your program.
You can also use fsutil dirty query f: to check if volume requires repair, and fsutil dirty set f: to manually set this bit. That also allows you to make a test USB.
On some computers, Scan&Fix popup may be disabled. Still, if you set dirty bit, Scan&Fix will show computers where it's not disabled.
PS: I think you should figure why your app crashes and fix that as well. I believe that is a separate problem in your app.
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