... application, enabling standard backup jobs to protect the database program files (that are easily replaceable) but skip the databases themselves.92 PART 1: MANAGING AND MAINTAINING THE OPERATING SYSTEMExercise ... that contains one or more drives (usually magnetic tape drives, but optical disk and CD-ROM autochangers are also available), a media array, and a robotic mechanism that swaps the media in ... drive and inserts another, after which the job continues. The autochanger also retains a memory of which tapes are available, commonly called an index, and can automatically load the appropriate...