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IOCTL_STORAGE_READ_CAPACITY IOCTL (winioctl.h)

Retrieves the geometry information for the device.

To perform this operation, call the DeviceIoControl function with the following parameters.

BOOL DeviceIoControl(
 (HANDLE) hDevice, // handle to device
 IOCTL_STORAGE_READ_CAPACITY, // dwIoControlCode
 NULL, // lpInBuffer
 0, // nInBufferSize
 (LPVOID) lpOutBuffer, // output buffer
 (DWORD) nOutBufferSize, // size of output buffer
 (LPDWORD) lpBytesReturned, // number of bytes returned
 (LPOVERLAPPED) lpOverlapped // OVERLAPPED structure 
);

Requirements

Requirement Value
Minimum supported client Windows Vista
Minimum supported server Windows Server 2008, Windows Server 2003 with SP1
Header winioctl.h (include Windows.h)

See also

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