capacity.
The
amount
of
data
that
can
be
contained
on
storage
media
and
expressed
in
bytes.
cartridge.
See
tape
cartridge
.
cartridge
door.
On
a
tape
cartridge,
the
hinged
barrier
that
can
be
opened
to
access,
or
closed
to
protect,
the
magnetic
tape
within
the
cartridge.
cartridge
manual
rewind
tool.
A
device
that
can
be
fitted
into
the
reel
of
a
cartridge
and
used
to
rewind
tape
into
or
out
of
the
cartridge.
cartridge
memory.
See
LTO
cartridge
memory
.
Celsius.
Having
a
thermometric
scale
on
which
the
interval
between
the
freezing
point
and
the
boiling
point
of
water
is
divided
into
100
degrees,
with
0°
representing
the
freezing
point
and
100°
representing
the
boiling
point.
channel
calibration.
A
feature
of
the
drive
by
which
it
automatically
customizes
each
read/write
data
channel
to
compensate
for
variations
in
such
things
as
the
recording
channel’s
transfer
function,
the
media,
and
characteristics
of
the
drive
head.
Channel
calibration
optimizes
system
performance.
circuit
board.
A
thin
sheet
on
which
chips
and
other
electronic
components
are
placed.
Computers
consist
of
one
or
more
boards,
often
called
cards
or
adapters.
cleaning
cartridge.
A
tape
cartridge
that
is
used
to
clean
the
heads
of
a
tape
drive.
Contrast
with
data
cartridge
.
clockwise.
In
the
direction
that
the
hands
of
a
clock
rotate,
as
viewed
from
the
front.
command
time-out.
Following
the
issuance
of
a
command,
a
period
of
time
during
which
it
is
determined
that
there
is
a
bad
connection
between
the
server
and
the
drive.
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.
contiguous.
Touching
along
a
boundary
or
at
a
point.
core.
The
light-conducting
central
portion
of
an
optical
fiber.
The
core
is
composed
of
material
that
has
a
higher
index
of
refraction
than
the
cladding
(the
material
that
surrounds
the
core).
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
that
is
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.
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.
diagnostic
cartridge.
A
tape
cartridge
that
enables
the
detection
and
isolation
of
errors
in
programs
and
faults
in
equipment.
direct
current
(dc).
An
electric
current
flowing
in
one
direction
only
and
substantially
constant
in
value.
director-class
switch.
A
high-end
switch
that
includes
such
qualities
as
fault
tolerance,
high
throughput,
high
reliability,
port
density,
and
so
forth.
drive.
See
IBM
TotalStorage
Ultrium
Tape
Drive
.
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
.
duplex.
See
duplex
transmission
.
120
IBM
TotalStorage
Ultrium
Tape
Drive
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