Steven W. Orr wrote:
Every file has two counters on it in the file system.
...
Basically all of what you've said is true, but the original question
stated that "du" was showing the directory using 3GB. That tool will
only operate on links that are present. Open files that still exist on
disk, but not in the filesystem, won't change the output of "du",
because it won't have anything to stat().