initial
program
load
(IPL).
The
initialization
procedure
that
causes
an
operating
system
to
commence
operation.
Also
referred
to
as
a
system
restart,
system
startup,
and
boot.
integrated
circuit
(IC).
A
microelectronic
semiconductor
device
that
consists
of
many
interconnected
transistors
and
other
components.
ICs
are
constructed
on
a
small
rectangle
cut
from
a
silicon
crystal
or
other
semiconductor
material.
The
small
size
of
these
circuits
allows
high
speed,
low
power
dissipation,
and
reduced
manufacturing
cost
compared
with
board-level
integration.
Also
known
as
a
chip
.
integrated
drive
electronics
(IDE).
A
disk
drive
interface
based
on
the
16-bit
IBM
personal
computer
Industry
Standard
Architecture
(ISA)
in
which
the
controller
electronics
reside
on
the
drive
itself,
eliminating
the
need
for
a
separate
adapter
card.
Also
known
as
an
Advanced
Technology
Attachment
Interface
(ATA).
Internet
Protocol
(IP).
A
protocol
that
routes
data
through
a
network
or
interconnected
networks.
IP
acts
as
an
intermediary
between
the
higher
protocol
layers
and
the
physical
network.
Internet
Protocol
(IP)
address.
The
unique
32-bit
address
that
specifies
the
location
of
each
device
or
workstation
on
the
Internet.
For
example,
9.67.97.103
is
an
IP
address.
interrupt
request
(IRQ).
A
type
of
input
found
on
many
processors
that
causes
the
processor
to
suspend
normal
processing
temporarily
and
start
running
an
interrupt
handler
routine.
Some
processors
have
several
interrupt
request
inputs
that
allow
different
priority
interrupts.
IP.
See
Internet
Protocol
.
IPL.
See
initial
program
load
.
IRQ.
See
interrupt
request
.
ISA.
See
Industry
Standard
Architecture
.
Java
Runtime
Environment
(JRE).
A
subset
of
the
Java
Development
Kit
(JDK)
for
end
users
and
developers
who
want
to
redistribute
the
Java
Runtime
Environment
(JRE).
The
JRE
consists
of
the
Java
virtual
machine,
the
Java
Core
Classes,
and
supporting
files.
JRE.
See
Java
Runtime
Environment
.
label.
A
discovered
or
user
entered
property
value
that
is
displayed
underneath
each
device
in
the
Physical
and
Data
Path
maps.
LAN.
See
local
area
network
.
LBA.
See
logical
block
address
.
local
area
network
(LAN).
A
computer
network
located
on
a
user’s
premises
within
a
limited
geographic
area.
logical
block
address
(LBA).
The
address
of
a
logical
block.
Logical
block
addresses
are
typically
used
in
hosts’
I/O
commands.
The
SCSI
disk
command
protocol,
for
example,
uses
logical
block
addresses.
logical
partition
(LPAR).
(1)
A
subset
of
a
single
system
that
contains
resources
(processors,
memory,
and
input/output
devices).
A
logical
partition
operates
as
an
independent
system.
If
hardware
requirements
are
met,
multiple
logical
partitions
can
exist
within
a
system.
(2)
A
fixed-size
portion
of
a
logical
volume.
A
logical
partition
is
the
same
size
as
the
physical
partitions
in
its
volume
group.
Unless
the
logical
volume
of
which
it
is
a
part
is
mirrored,
each
logical
partition
corresponds
to,
and
its
contents
are
stored
on,
a
single
physical
partition.
(3)
One
to
three
physical
partitions
(copies).
The
number
of
logical
partitions
within
a
logical
volume
is
variable.
logical
unit
number
(LUN).
An
identifier
used
on
a
small
computer
system
interface
(SCSI)
bus
to
distinguish
among
up
to
eight
devices
(logical
units)
with
the
same
SCSI
ID.
loop
address.
The
unique
ID
of
a
node
in
fibre-channel
loop
topology
sometimes
referred
to
as
a
loop
ID.
loop
group.
A
collection
of
storage
area
network
(SAN)
devices
that
are
interconnected
serially
in
a
single
loop
circuit.
loop
port.
A
node
port
(N_port)
or
fabric
port
(F_port)
that
supports
arbitrated
loop
functions
associated
with
an
arbitrated
loop
topology.
LPAR.
See
logical
partition
.
LUN.
See
logical
unit
number
.
MAC.
See
medium
access
control
.
management
information
base
(MIB).
The
information
that
is
on
an
agent.
It
is
an
abstraction
of
configuration
and
status
information.
man
pages.
In
UNIX-based
operating
systems,
online
documentation
for
operating
system
commands,
subroutines,
system
calls,
file
formats,
special
files,
stand-alone
utilities,
and
miscellaneous
facilities.
Invoked
by
the
man
command.
MCA.
See
micro
channel
architecture
.
media
scan.
A
media
scan
is
a
background
process
that
runs
on
all
logical
drives
in
the
storage
subsystem
for
which
it
has
been
enabled,
providing
error
detection
on
the
drive
media.
The
media
scan
process
scans
all
Glossary
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