Quantum DLT 2000 Handbook page 194

Data Cartridge. The enclosed media cassette that is used to hold
recording/restoral media.
Data Compression. A process generated by either hardware or
software that reduces the amount of storage space required to hold
a particular block of data. Typical compression rates are 2:1 or 3:1
and allow approximately double and triple the data storage
respectively.
Data Integrity. The level of error-free storage of data. It is a key
factor in the reliability of any technology.
Data Interchange. The capability of moving data from one tape
drive to another without intermediate processing.
Data Mining. The identification of trends and other patterns in
very large databases of consumer and other information. DLTtape
drives are often used to back up and/or provide near on-line access
to large databases used in data mining.
Data Mirroring. Capability provided by multi-drive tape libraries
or RAIT (Redundant Array of Independent Tape drives) systems
whereby two copies of the same data are written simultaneously.
Provides copy of data for off-site archiving and disaster recovery
protection.
Density. The amount of data stored in a particular section of
media. The higher the density the more data stored in the same
space.
Duty Cycle. A measure of the percentage of time a tape drive is
actually used during a given period. Most tape drive manufacturers
provide reliability figures based on 20 percent or less duty cycle.
DLTtape drive figures are based on 100 percent duty cycle.
G.6 GLOSSARY