When a database is opened in shared mode, it’s necessary to address concurrency issues. This is done through a locking information file.
You can delete a locking information file only when no users have its related database file (.mdb) open. If you move a database file to a new location, it’s not necessary to move the .ldb file. For more information about the locking information file, see “Microsoft Jet Locking Architecture” later in this chapter.