compression.
The process of eliminating gaps, empty
fields, redundancies, and unnecessary
data to shorten the length of records or
blocks.
configure.
To describe to a server the devices,
optional features, and programs installed
on the system.
counterclockwise.
In a direction opposite to that in which
the hands of a clock rotate, as viewed
from the front.
current.
The quantity of charge per unit of time.
Current is measured in amperes.
cycle power.
To apply and remove electrical power to a
device within a short time span.
D
data. Any representations such as characters or
analog quantities to which meaning is, or
might be, assigned.
data cartridge.
A tape cartridge dedicated to storing data.
Contrast with cleaning cartridge.
data compression.
See compression.
data transfer rate.
The average number of bits, characters, or
blocks per unit of time that pass between
corresponding equipment in a data
transmission system. The rate is expressed
in bits, characters, or blocks per second,
minute, or hour.
DC. See direct current.
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.
58 Dell PowerVault LTO Tape Drive: User's Guide
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