M H - 2012-02-20

I've got two directory paths, one containing my videos, the other my music (all the files are arranged in sub-directories, by date for the videos and by artist then album for the music), and I've set these base paths up under the web interface to be published by MediaTomb.  However, when I look in the database it only seems to be partially populated - not all the directories are there, and in some which have multiple files sometimes there are files missing.  I've tried setting up the scan mode as both INotify and Timed (it's currently set to timed/full/recursive/1800-seconds) but neither seem to fully populate the database.  Is there a way I can kick off a full rescan, or should I be doing this from the shell or manually configuring the xml files, if there are a large amount of files under the base path?