If you're using the default setup, the DefaultDS is configured to use HSQL (http://www.hsqldb.org). The settings for DefaultDS are configured here (you can get the jdbc info here as well): $JBOSS_HOME/servers/$YOUR_SERVER/deploy/hsqldb-ds.xml The data files themselves will be under $JBOSS_HOME/servers/$YOUR_SERVER/data You should be able to access the db using any jdbc client using the settings in the .xml config file. Does that answer your question? Modoc View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3989022#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...