The default behavior of the Zebra system is to reference the
   records from their original location, i.e. where they were found when you
   run zebraidx.
   That is, when a client wishes to retrieve a record
   following a search operation, the files are accessed from the place
   where you originally put them - if you remove the files (without
   running zebraidx again, the server will return
   diagnostic number 14 (``System error in presenting records'') to
   the client.
  
   If your input files are not permanent - for example if you retrieve
   your records from an outside source, or if they were temporarily
   mounted on a CD-ROM drive,
   you may want Zebra to make an internal copy of them. To do this,
   you specify 1 (true) in the storeData setting. When
   the Z39.50 server retrieves the records they will be read from the
   internal file structures of the system.