hfrmobile:1389774368 wrote
I discovered that DokuWiki does not set the a-bit (archive bit) of the .txt page files when changed
This has nothing to do with DokuWiki. The archive bit gets set by the Operating System and not by any software (unless it's software specifically for that purpose, like archivers, etc). As the archive bit is only supported by certain OS (according to the Wikipedia article it's "used by Microsoft operating systems, by OS/2 and by AmigaOS") and I doubt your NAS server is running those, there is your problem.