IOCTL_DISK_GET_CLUSTER_INFO control code
Retrieves the attributes of the specified disk device.
To perform this operation, call the DeviceIoControl function with the following parameters.
BOOL
WINAPI
DeviceIoControl( (HANDLE) hDevice, // handle to device
IOCTL_DISK_GET_CLUSTER_INFO, // dwIoControlCode
(LPVOID) NULL, // lpInBuffer
(DWORD) 0, // nInBufferSize
(LPVOID) lpOutBuffer, // output buffer:GET_DISK_ATTRIBUTES
(DWORD) nOutBufferSize, // size of output buffer
(LPDWORD) lpBytesReturned, // number of bytes returned
(LPOVERLAPPED) lpOverlapped ); // OVERLAPPED structure
Parameters
-
hDevice
-
A handle to the disk.
To retrieve a device handle, call the CreateFile function.
-
dwIoControlCode
-
The control code for the operation.
Use IOCTL_DISK_GET_CLUSTER_INFO for this operation.
-
lpInBuffer
-
Not used with this operation. Set to NULL.
-
nInBufferSize
-
The size of the input buffer, in bytes. Set to 0 (zero).
-
lpOutBuffer
-
A pointer to a buffer that receives a DISK_CLUSTER_INFO data structure.
-
nOutBufferSize
-
The size of the output buffer, in bytes.
-
lpBytesReturned
-
Not used with this operation. Set to NULL.
-
lpOverlapped
-
A pointer to an OVERLAPPED structure.
If hDevice was opened without specifying FILE_FLAG_OVERLAPPED, lpOverlapped is ignored.
If hDevice was opened with the FILE_FLAG_OVERLAPPED flag, the operation is performed as an overlapped (asynchronous) operation. In this case, lpOverlapped must point to a valid OVERLAPPED structure that contains a handle to an event object. Otherwise, the function fails in unpredictable ways.
For overlapped operations, DeviceIoControl returns immediately, and the event object is signaled when the operation has been completed. Otherwise, the function does not return until the operation has been completed or an error occurs.
Return value
If the operation completes successfully, indicating that all volumes on the disk are ready for use, DeviceIoControl returns a nonzero value.
If the operation fails or is pending, DeviceIoControl returns zero. To get extended error information, call GetLastError.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
None supported |
| Minimum supported server |
Windows Server 2012 [desktop apps only] |
| Header |
|