 a copy in anticipation of future failure or corruption. Thus a dump forms a backup to
be used in cases where a user's file has become unusable; the taking of the dump can be regarded as backing up the version on
disk. [Computer and Information Sciences] 
n., A copy of an electronic file usually made and maintained for computer security purposes. [Computer and Information
Sciences] 
n., Additional resources or duplicate copies of data on different storage media for emergency purposes. [Computer and
Informat