CHAPTER 57
DATA BACKUPS AND ARCHIVES
M. E. Kabay and Don Holden
57.2.2 Hierarchical Storage Systems
57.3.1 Selecting the Backup Technology
57.4 DATA LIFE CYCLE MANAGEMENT
57.4.3 Media Longevity and Technology Changes
57.5.1 Environmental Protection
57.6.2 Data and Media Destruction
57.8 OPTIMIZING FREQUENCY OF BACKUPS
57.1 INTRODUCTION.
Nothing is perfect. Equipment breaks, people make mistakes, and data files become corrupted or disappear. Everyone, and every system, needs a well-thought-out backup and retrieval policy. In addition to making backups, data processing personnel also must consider requirements for archival storage and for retrieval of data copies. Backups also apply to personnel, equipment, and electrical power; for other applications of redundancy, see Chapters 23 and 45 in this Handbook.
57.1.1 Definitions.
Backups are copies of data files or records, made at a moment in time, and primarily used in the ...
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