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FSCTL_QUERY_FILE_SYSTEM_RECOGNITION IOCTL (winioctl.h)

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Queries for file system recognition information on a volume.

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

BOOL DeviceIoControl(
  (HANDLE) hDevice,                     // handle to volume
  FSCTL_QUERY_FILE_SYSTEM_RECOGNITION,  // 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
);

Remarks

In Windows 8 and Windows Server 2012, this code is supported by the following technologies.

Technology Supported
Server Message Block (SMB) 3.0 protocol No
SMB 3.0 Transparent Failover (TFO) No
SMB 3.0 with Scale-out File Shares (SO) No
Cluster Shared Volume File System (CsvFS) No

Requirements

Requirement Value
Minimum supported client Windows 7 [desktop apps only]
Minimum supported server Windows Server 2008 R2 [desktop apps only]
Header winioctl.h (include Windows.h)

See also