G
GBIC.
See
gigabit
interface
converter
.
gigabit
interface
converter
(GBIC).
An
interface
module
that
converts
the
light
stream
from
a
fibre-channel
cable
into
electronic
signals
for
use
by
the
network
interface
card.
H
HBA.
See
host
bus
adapter
.
host
bus
adapter
(HBA).
In
SAN
Volume
Controller,
an
interface
card
that
connects
a
host
bus,
such
as
a
peripheral
component
interconnect
(PCI)
bus,
to
the
storage
area
network.
host
ID.
In
SAN
Volume
Controller,
a
numeric
identifier
assigned
to
a
group
of
host
fibre-channel
ports
for
the
purpose
of
logical
unit
number
(LUN)
mapping.
For
each
host
ID,
there
is
a
separate
mapping
of
Small
Computer
System
Interface
(SCSI)
IDs
to
virtual
disks
(VDisks).
host
zone.
A
zone
defined
in
the
storage
area
network
(SAN)
fabric
in
which
the
hosts
can
address
the
SAN
Volume
Controllers.
I
inconsistent.
In
a
Remote
Copy
relationship,
pertaining
to
a
secondary
virtual
disk
(VDisk)
that
is
being
synchronized
with
the
primary
VDisk.
input/output
(I/O).
Pertaining
to
a
functional
unit
or
communication
path
involved
in
an
input
process,
an
output
process,
or
both,
concurrently
or
not,
and
to
the
data
involved
in
such
a
process.
Internet
Protocol
(IP).
In
the
Internet
suite
of
protocols,
a
connectionless
protocol
that
routes
data
through
a
network
or
interconnected
networks
and
acts
as
an
intermediary
between
the
higher
protocol
layers
and
the
physical
network.
IP.
See
Internet
Protocol
.
I/O.
See
input/output.
I/O
group.
A
collection
of
virtual
disks
(VDisks)
and
node
relationships
that
present
a
common
interface
to
host
systems.
L
local
fabric.
In
SAN
Volume
Controller,
those
storage
area
network
(SAN)
components
(such
as
switches
and
cables)
that
connect
the
components
(nodes,
hosts,
switches)
of
the
local
cluster
together.
logical
unit
(LU).
An
entity
to
which
Small
Computer
System
Interface
(SCSI)
commands
are
addressed,
such
as
a
virtual
disk
(VDisk)
or
managed
disk
(MDisk).
logical
unit
number
(LUN).
The
SCSI
identifier
of
a
logical
unit
within
a
target.
(S)
LU.
See
logical
unit
.
LUN.
See
logical
unit
number
.
M
managed
disk
(MDisk).
A
Small
Computer
System
Interface
(SCSI)
logical
unit
that
a
redundant
array
of
independent
disks
(RAID)
controller
provides
and
a
cluster
manages.
The
MDisk
is
not
visible
to
host
systems
on
the
storage
area
network
(SAN).
managed
disk
group.
A
collection
of
managed
disks
(MDisks)
that,
as
a
unit,
contain
all
the
data
for
a
specified
set
of
virtual
disks
(VDisks).
mapping.
See
FlashCopy
mapping
.
MDisk.
See
managed
disk
.
N
node.
One
SAN
Volume
Controller.
Each
node
provides
virtualization,
cache,
and
Copy
Services
to
the
storage
area
network
(SAN).
O
object.
In
object-oriented
design
or
programming,
a
concrete
realization
of
a
class
that
consists
of
data
and
the
operations
associated
with
that
data.
offline.
Pertaining
to
the
operation
of
a
functional
unit
or
device
that
is
not
under
the
continual
control
of
the
system
or
of
a
host.
online.
Pertaining
to
the
operation
of
a
functional
unit
or
device
that
is
under
the
continual
control
of
the
system
or
of
a
host.
P
port.
The
physical
entity
within
a
host,
SAN
Volume
Controller,
or
disk
controller
system
that
performs
the
data
communication
(transmitting
and
receiving)
over
the
fibre
channel.
R
RAID.
See
redundant
array
of
independent
disks
.
reliability.
The
ability
of
a
system
to
continue
to
return
data
even
if
a
component
fails.
60
Installation
Guide
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