Database files are objects of type *FILE on the i5/OS® system. They can be either physical or logical files and either externally described or program-described. You access database files by associating the file name with the device DISK in positions 36 through 42 of the file description specifications.
Database files can be created by IBM i Create File commands. For more information on describing and creating database files, refer to the DB2 Universal Database™ for iSeries® section of the Database and File Systems category in the i5/OS Information Center at this Web site - http://www.ibm.com/systems/i/infocenter/.