Freecom Quantum SuperLoader 3, Manual

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Glossary
194 SuperLoader 3 Autoloader User’s Guide
base plate
An aluminum die casting that acts as the support platform for
the other modules and for the drive enclosure. The base plate is standard
5.25 inch (133.35 mm) full-high form factor and includes the precision
mounting holds used to install Super DLTtape drives into a server or tape
library. The TCM acts as the prime base plate for the Super DLTtape
system.
bus
A communication pathway between components in a computer
system.
C
C
Celsius. A measurement of temperature where 0 degrees is the
freezing and 100 degrees is the boiling point of water.
cartridge receiver
At tape insertion, the cartridge receiver assembly is
responsible for guiding the tape into its operating position, opening its
door, unlocking the cartridge brakes, and securing the tape for operation.
At tape ejection, the cartridge receiver assembly reverses the process and
automatically ejects the tape a fixed distance from the front of the drive.
compressed capacity
Capacity after data has been processed to reduce
storage space while maintaining data integrity using either software or
hardware.
cartridge tape module (CPTM)
The Super DLTtape CTM contains the
AMP media feature of Quantum’s LGMR technology. The main function
of the CTM is to provide the magnetic recording media used by the drive
to store customer information. The CTM also provides the protective
cartridge that allows the media to be removed and stored safely.
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
tape 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 are dependent on the
redundancy of data files being recorded.
data control module (DCM)
The DCM contains several of the functions
and features of Quantum’s LGMR technology, which is at the heart of the
Super DLTtape technology. Of the five technologies that constitute the
LGMR technology, two are found in the DCM. These are the POS and the
MRC heads. The main functions of the DCM are to provide the path and
guides for all tape motion inside the drive and to write data to and read
data from the tape.