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FSCTL_FILESYSTEM_GET_STATISTICS_EX IOCTL (winioctl.h)

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Retrieves the information from various file system performance counters.Support for this control code started with Windows 10.

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

BOOL DeviceIoControl(
  (HANDLE) hDevice,                     // handle to device
  FSCTL_FILESYSTEM_GET_STATISTICS_EX,   // 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 10, this code is supported by the following technologies.

Technology Supported
Server Message Block (SMB) 3.0 protocol Yes
SMB 3.0 Transparent Failover (TFO) Yes
SMB 3.0 with Scale-out File Shares (SO) Yes
Cluster Shared Volume File System (CsvFS) Yes
Resilient File System (ReFS) Yes

Requirements

Requirement Value
Minimum supported client Windows 10 [desktop apps only]
Minimum supported server Windows Server 2016 [desktop apps only]
Header winioctl.h (include Windows.h)

See also