User's Manual

Glossary
DLT-V4 Product Manual 77
C
C The degree Celsius (°C) is a unit of temperature.
Cartridge Receiver At media insertion, the cartridge receiver assembly is
responsible for guiding the media into its operating position, opening the door,
unlocking the cartridge brakes, and securing the media for operation. At media
ejection, the cartridge receiver assembly reverses the process and automatically
ejects the cartridge a fixed distance from the front of the tape drive.
CE Council of Europe.
Compressed Capacity Capacity after data has been processed, using either
software or hardware, to reduce storage space while maintaining data integrity.
(See also Data Compression.)
CFR Code of Federal Regulations (United States).
CSA Canadian Standards Association, also known as CSA International.
D
Data Compression A process that reduces the amount of storage space required
to hold a particular block of data. Data transfer speed and total media capacity are
affected by the data compression achieved. In accordance with industry practice,
a typical compression ratio is 2:1 of data storage. Actual compression ratios
achieved depend on the redundancy of data files being written.
dB A Decibel is a logarithmic unit of sound intensity; 10 times the logarithm of
the ratio of the sound intensity to some reference intensity.
DC Direct Current is the continuous flow of electricity through a conductor such
as a wire from high to low potential.
Device According to the SCSI specification, multiple SCSI devices can be
connected to a single SCSI bus. Each SCSI device contains a SCSI ID number that
can be set in the range 0 to 15.
Device Driver A low-level (usually kernel-mode) operating system component
that enables a PC to communicate with peripheral devices such as printers, CD-
ROMs, and tape drives. Each kind of device requires a different driver.
Differential A term referring to the electrical characteristics of the signal used on
the SCSI bus interface. Differential signals minimize the effect of common mode
signal noise and allow the SCSI bus to operate reliably over greater distances at a
higher speed.
DLT Digital Linear Tape.
DLZ Digital Lempel-Ziv 1 Algorithm is named after Abraham Lempel and Jacob
Ziv. It is a data compression technique used in all tape drives.
E
EEC European Economic Community.