(1) Pertaining to a system, device, file, or facility that can be used in the event of a malfunction or loss of data.
(2) A tape, diskette, or save file containing saved objects.
(3) A copy of a data set or object to be used in case of accidental loss.
(4) The process of copying a file, directory, file system, or other data onto a tape, disk, or other media as insurance against data loss or corruption.
(5) A copy of a database or table space that can be stored on a different medium and used to restore the database or table space in the event of failure or damage to the original.
(6) The process of making a copy of a data file that can be used if the original file is destroyed.