primitive
signal.
A
part
of
an
ordered
set
that
indicates
events.
See
also
ordered
set
.
principal
switch.
The
switch
that
assumes
the
responsibility
to
assign
domain
IDs.
The
role
of
principal
switch
is
negotiated
after
a
“build
fabric”
event.
private
device.
A
device
that
supports
arbitrated
loop
protocol
and
can
interpret
8–bit
addresses,
but
cannot
log
into
the
fabric.
private
loop.
An
arbitrated
loop
that
does
not
include
a
participating
fabric
loop
port
(FL_port).
private
key.
The
secret
half
of
a
key
pair.
private
loop
direct
attach
(PLDA).
A
subset
of
fibre
channel
standards
for
the
operation
of
peripheral
devices.
private
NL_port.
A
node
loop
port
(NL_port)
that
communicates
only
with
other
private
NL_ports
in
the
same
loop
and
does
not
log
into
the
fabric.
protocol.
A
defined
method
and
a
set
of
standards
for
communication.
public
device.
A
device
that
supports
arbitrated
loop
protocol,
can
interpret
8–bit
addresses,
and
can
log
into
the
fabric.
public
loop.
An
arbitrated
loop
that
includes
a
participating
fabric
loop
port
(FL_port),
and
can
contain
both
public
and
private
node
loop
ports
(NL_ports).
public
NL_port.
A
node
loop
port
(NL_port)
that
logs
into
the
fabric,
can
function
within
either
a
public
or
private
loop,
and
can
communicate
with
either
private
or
public
NL_ports.
Q
quad.
A
group
of
four
adjacent
ports
that
share
a
common
pool
of
frame
buffers.
QuickLoop.
(1)
A
software
feature
that
makes
it
possible
to
allow
private
devices
within
loops
to
communicate
with
public
and
private
devices
across
the
fabric
through
the
creation
of
a
larger
loop.
(2)
The
arbitrated
loop
created
using
this
software.
A
QuickLoop
can
contain
a
number
of
devices
or
looplets;
all
devices
in
the
same
QuickLoop
share
a
single
arbitrated
loop
physical
address
(AL_PA)
space.
QuickLoop
mode.
A
hardware
translative
mode
that
allows
private
devices
to
communicate
with
other
private
devices
across
the
fabric.
See
also
hardware
translative
mode
and
standard
translative
mode
.
R
RAID.
See
redundant
array
of
independent
disks
.
RAM.
See
random
access
memory
.
random
access
memory
(RAM).
A
temporary
storage
location
in
which
the
central
processing
unit
(CPU)
stores
and
executes
its
processes.
R_A_TOV.
See
resource
allocation
timeout
value
.
read
only
memory
(ROM).
Memory
in
which
stored
data
cannot
be
changed
by
the
user
except
under
special
conditions.
receiver
ready
(R_RDY).
A
primitive
signal
indicating
that
the
port
is
ready
to
receive
a
frame.
redundant
array
of
independent
disks
(RAID).
A
collection
of
disk
drives
that
appear
as
a
single
volume
to
the
server
and
are
fault
tolerant
through
mirroring
or
parity
checking.
registered
state
change
notification
(RSCN).
A
switch
function
that
allows
notification
of
fabric
changes
to
be
sent
from
the
switch
to
specified
nodes.
remote
fabric.
A
fabric
that
spans
across
wide
area
networks
(WANs)
by
using
protocol
translation
(a
process
also
known
as
tunneling)
such
as
fibre
channel
over
asynchronous
transfer
mode
(ATM)
or
fibre
channel
over
Internet
protocol
(IP).
remote
switch.
A
optional
feature
for
long
distance
fabrics,
requireing
a
Fibre
Channel
to
ATM
or
SONET
gateway.
request
rate.
The
rate
at
which
requests
arrive
at
a
servicing
entity.
See
also
service
rate
.
resilience.
A
fabric’s
ability
to
adapt
to
or
tolerate
a
failure
of
a
component
within
the
fabric.
resilient
core.
A
single
fabric
that
uses
two
or
more
switches
as
a
core
to
interconnect
multiple
edge
switches.
Synonymous
with
dual-core
fabric.
resource
allocation
timeout
value
(R_A_TOV).
Used
to
time
out
operations
that
depend
on
the
maximum
possible
time
that
a
frame
can
be
delayed
in
a
fabric
and
still
be
delivered.
This
value
is
adjustable
in
one
microsecond
increments
from
10—120
seconds.
resource
recover
timeout
value
(RR_TOV).
The
minimum
time
a
target
device
in
a
loop
waits
after
a
loop
initialization
primitive
(LIP)
before
logging
out
a
small
computer
systems
interface
(SCSI)
initiator.
See
also
error
detect
timeout
value
and
resource
allocation
timeout
value
.
RLS
probing.
Read
link
status
of
the
arbitrated
loop
physical
addresses
(AL_PAs).
58
SAN16B-2
Installation,
Service,
and
User’s
Guide
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