Sets the attributes for a file or directory. To perform this operation as a transacted operation, use the SetFileAttributesTransacted function. For more information, see File Names, Paths, and Namespaces.
Otherwise, the system caching behaves as specified for each flag. Some of these flags should not be combined. Performance gains can be even more noticeable for applications that read large files mostly sequentially, but occasionally skip forward over small ranges of bytes.
If an application moves the file pointer for random access, optimum caching performance most likely will not occur. However, correct operation is still guaranteed. For more information, see File Buffering.
Using these flags together avoids those penalties. For general information about the caching of files and metadata, see File Caching. Also, the file metadata may still be cached for example, when creating an empty file.
To ensure that the metadata is flushed to disk, use the FlushFileBuffers function. In that case, the system can entirely avoid writing the data.
Files If you rename or delete a file and then restore it shortly afterward, the system searches the cache for file information to restore. If you call CreateFile on a file that is pending deletion as a result of a previous call to DeleteFilethe function fails.
The operating system delays file deletion until all handles to the file are closed. The dwDesiredAccess parameter can be zero, allowing the application to query file attributes without accessing the file if the application is running with adequate security settings.
To avoid the error, specify the same attributes as the existing file. The resulting code is faster, because the redirector can use the cache manager and send fewer SMBs with more data. For more information, see Creating and Opening Files.
For more information, see File Streams. Access to the directory is denied if this is done. For more information, see About Directory Management. Physical Disks and Volumes Direct access to the disk or to a volume is restricted.
For more information, see "Changes to the file system and to the storage stack to restrict direct disk access and direct volume access in Windows Vista and in Windows Server " in the Help and Support Knowledge Base at http: Direct access to the disk or to a volume is not restricted in this manner.
You can use the CreateFile function to open a physical disk drive or a volume, which returns a direct access storage device DASD handle that can be used with the DeviceIoControl function. This enables you to access the disk or volume directly, for example such disk metadata as the partition table.Preface.
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Sep 27, · ERROR_SUCCESS - 0x - (0) The operation completed successfully. ERROR_INVALID_FUNCTION - 0x - (1) Incorrect function.
ERROR_FILE_NOT_FOUND - 0x - (2) The system cannot find the file specified.