kb:1214067991 wrote
Is there a way to disable the cache for this specific directory (or completely) and is there a way to prevent dokuwiki from writing .meta files?
Nope. The only way I see is to a) either delete the generated .meta/cache files (not an option because tedious and insecure) or b) have a separate data dir containing your files with the complete structure meta/index/etc you can mount and the tell DokuWiki to use it as savedir [1] for the time you want to edit your secret files.
[1]
http://wiki.splitbrain.org/wiki:config#savedir