See Also
 Important: |
|---|
| This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. |
This I/O control marks the specified file as sparse. In a sparse file, large ranges of zeros may not require disk allocation. Space for nonzero data is allocated as needed as the file is written.
Parameters
- hDevice
-
[in] Handle to the file or alternate stream to be made sparse. To obtain a handle, call the CreateFilefunction.
- dwIoControlCode
-
[in] Set to FSCTL_SET_SPARSE.
- lpInBuf
-
Not used. Set to NULL.
- nInBufSize
-
Not used. Set to zero.
- lpOutBuf
-
Not used. Set to NULL.
- nOutBufSize
-
Not used. Set to NULL.
- lpBytesReturned
-
[out] Pointer to a variable that receives the size of the data stored in the output buffer, in bytes.
- lpOverlapped
-
Not used.
Return Values
If the operation succeeds, the DeviceIoControlfunction returns a nonzero value. If the operation fails, DeviceIoControlreturns zero. For extended error information, call GetLastError.
Remarks
This I/O control sets the FILE_ATTRIBUTE_SPARSE_FILE attribute of the specified file. The only way to clear this attribute is to overwrite the file, for example, by calling the CreateFilefunction with the CREATE_ALWAYS flag.
Requirements
| Header | fsioctl.h |
| Windows Embedded CE | Windows CE 5.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
See Also
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at webmaster@systemmanager.forsenergy.ru to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.