Quantum DLT 7 Manual descarregar pdf (Página 164)

Glossary

DLT-S4 Product Manual 146

customer information. The CTM also provides the protective cartridge,

which allows the media to be removed and stored safely.

CUP Code Update (a firmware update).

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.

DCB Drive Control Board.

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.

DLTSage WORM Quantum’s firmware compliance management function

of DLTSage, which provides secure archival functionality to the DLT-S4

tape drive and the DLTtape S4 cartridge.

DLTSage Quantum’s suite of intelligent data protection tools that

enables users to more effectively manage and protect tape storage

environments.

DLZ Digital Lempel-Ziv 1 Algorithm is named after Abraham Lempel

and Jacob Ziv. It is a data compression technique used in all SDLT tape

drives.

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Quantum DLT 7 Manual Página 164