Article ID: Q400002
The information in this article applies to:
If the program trying to open a handle to a Direct I/O device has a long filename the access to Direct I/O is denied. This article tries to give the background info and possible actions to be taken.
Direct I/O introduces a security concept
where only selected applications are allowed to use the resources provided by the driver.
Therefore the driver needs to check whether a process is allowed or not by examining the
Use MS-DOS compatible 8.3 filenames i.e. 8 characters file base name and 3 characters file extension.
This limitation has been removed in Direct I/O version 4.2.