Guest-OS    Host-OS    Behavior of RTFileWrite (on the Host)   Implementation of RTFileWrite
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Windows     Linux      as Windows' WriteFile,                  1) cache modif./creation time
                       i.e. not reseting modification             *of the file*
                       (and creation?) time.                      (how the guest-OS sees them),
                                                               2) call ´write´,
                                                               3) restore cached parts of timestamp

Linux       Windows    as Linux' write,                        1) call ´WriteFile´,
                       i.e. reset modification and             2) reset modif. and creation times
                       creation time!                          to the current *system time*
                                                               (how the guest-OS sees it)!

Windows     Windows    as Windows' WriteFile                   simply call ´WriteFile´

Linux       Linux      as Linux' write                         simply call ´write´