Hi Thomas,
To answer your question - yes I do link a folder to the disk direct function. The OS needs that. That is why all my setups (MDB etc) that require a disk direct style of registration are all in the one directory (folder) so that the system knows where to look. I then index them accordingly so as not to loose the order. The biggest fallback I have found with using disk direct rather than flash ram is that you don't get the OTS in the disk direct - I can appreciate why - loading time during performance etc. so its not an issue. I hope that this sheds a little more light on the topic.
Jon.