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
.
redundant
array
of
independent
disks
A
collection
of
two
or
more
disk
drives
that
present
the
image
of
a
single
disk
drive
to
the
system.
In
the
event
of
a
single
device
failure,
the
data
can
be
read
or
regenerated
from
the
other
disk
drives
in
the
array.
reliability
The
ability
of
a
system
to
continue
to
return
data
even
if
a
component
fails.
S
SAN
See
storage
area
network
.
SCSI
See
Small
Computer
Systems
Interface
.
Simple
Network
Management
Protocol
(SNMP)
In
the
Internet
suite
of
protocols,
a
network
management
protocol
that
is
used
to
monitor
routers
and
attached
networks.
SNMP
is
an
application-layer
protocol.
Information
on
devices
managed
is
defined
and
stored
in
the
application’s
Management
Information
Base
(MIB).
Small
Computer
System
Interface
(SCSI)
A
standard
hardware
interface
that
enables
a
variety
of
peripheral
devices
to
communicate
with
one
another.
SNMP
See
Simple
Network
Management
Protocol
.
storage
area
network
(SAN)
A
network
whose
primary
purpose
is
the
transfer
of
data
between
computer
systems
and
storage
elements
and
among
storage
elements.
A
SAN
consists
of
a
communication
infrastructure,
which
provides
physical
connections,
and
a
management
layer,
which
organizes
the
connections,
storage
elements,
and
computer
systems
so
that
data
transfer
is
secure
and
robust.
(S)
subsystem
device
driver
(SDD)
An
IBM
pseudo
device
driver
designed
to
support
the
multipath
configuration
environments
in
IBM
products.
symmetric
virtualization
A
virtualization
technique
in
which
the
physical
storage
in
the
form
of
Redundant
Array
of
Independent
Disks
(RAID)
is
split
into
smaller
chunks
of
storage
known
as
extents
.
These
extents
are
then
concatenated,
using
various
policies,
to
make
virtual
disks
(VDisks).
See
also
asymmetric
virtualization
.
U
uninterruptible
power
supply
A
device
connected
between
a
computer
and
its
power
source
that
protects
the
computer
against
blackouts,
brownouts,
and
power
surges.
The
102
IBM
System
Storage
SAN
Volume
Controller:
Installation
Guide
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