degauss
To make a magnetic tape nonmagnetic by exposing the tape to electrical
coils which carry currents that neutralize the magnetism of the tape.
device.
Any hardware component or peripheral, such as a tape drive or tape
library, that can receive and send data.
device driver.
A file that contains the firmware that is needed to use an attached device.
diagnostic.
A software program that is designed to recognize, locate, and explain faults
in equipment or errors in programs.
direct current (DC).
An electric current flowing in one direction only and substantially constant
in value.
drive.
A data-storage device that controls the movement of the magnetic tape in a
tape cartridge. The drive houses the mechanism (drive head) that reads
and writes data to the tape.
drive dump.
The recording, at a particular instant, of the contents of all or part of one
storage device into another storage device, usually as a safeguard against
faults or errors, or in connection with debugging.
drive head.
The component that records an electrical signal onto magnetic tape, or
reads a signal from tape into an electrical signal.
drive sense data.
See
SCSI drive sense data
.
dump.
See
drive dump
.
E
eject.
To remove or force out from within.
enclosure.
A device, such as a desktop unit, tape cartridge autoloader, or tape library,
into which you can install the tape drive.
error log.
Maintained by the tape drive, a list that contains the ten most recent error
codes. The codes identify errors that pertain to the drive.
F
F.
See
Fahrenheit
.
Fahrenheit (F).
Of or relating to a temperature scale that registers the freezing point of
water as 32 degrees and the boiling point as 212 degrees at one atmosphere
of pressure.
file.
A named set of records stored or processed as a unit.
firmware.
The proprietary code that is usually delivered as part of an operating
system. Firmware is more efficient than software that is loaded from an
alterable medium, and is more adaptable to change than pure hardware
Glossary
B-3
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