Tandberg Data SDLT 600 - Manual (Page 115)

SDLT 600 Product Manual
81-81184-02 REV A01 March 2004 G-3
C
D
Cache Specialized RAM used as a buffer between a fast CPU or I/O
channel and storage which has a relatively slow access time (for
example, tape or diskette), to avoid slowing down the former.
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 data cartridge a
fixed distance from the front of the tape drive.
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.)
CSA Canadian Standards Association, also known as CSA
International.
CTM Cartridge Tape Module. The main function of the SDLT’s CTM
is to provide the magnetic recording media used by the tape drive
to store customer information. The CTM also provides the
protective cartridge that allows the media to be removed and
stored safely.
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.
DC Direct Current.
DCM Data Control Module. The main functions of the DCM are to
provide the path and guides for the all media motion inside the
tape drive and to write data to and read data from the media.