IBM Partner Pavilion DS4100 User Manual
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small
computer
system
interface
(SCSI).
A
standard
hardware
interface
that
enables
a
variety
of
peripheral
devices
to
communicate
with
one
another.
small
form-factor
pluggable
(SFP).
An
optical
transceiver
that
is
used
to
convert
signals
between
optical
fiber
cables
and
switches.
An
SFP
is
smaller
than
a
gigabit
interface
converter
(GBIC).
See
also
gigabit
interface
converter.
SNMP.
See
Simple
Network
Management
Protocol
and
SNMPv1.
SNMP
time-out.
The
maximum
amount
of
time
the
SANavigator
tool
will
wait
for
a
device
to
respond
to
a
request.
The
specified
time
applies
to
one
retry
only.
SNMP
trap
event.
(1)
(2)
An
event
notification
sent
by
the
SNMP
agent
that
identifies
conditions,
such
as
thresholds,
that
exceed
a
predetermined
value.
See
also
Simple
Network
Management
Protocol.
SNMPv1.
The
original
standard
for
SNMP
is
now
referred
to
as
SNMPv1,
as
opposed
to
SNMPv2,
a
revision
of
SNMP.
See
also
Simple
Network
Management
Protocol.
SRAM.
See
static
random
access
memory.
SSA.
See
serial
storage
architecture.
static
random
access
memory
(SRAM).
Random
access
memory
based
on
the
logic
circuit
know
as
flip-flop.
It
is
called
static
because
it
retains
a
value
as
long
as
power
is
supplied,
unlike
dynamic
random
access
memory
(DRAM),
which
must
be
regularly
refreshed.
It
is
however,
still
volatile,
meaning
that
it
can
lose
its
contents
when
the
power
is
turned
off.
storage
area
network
(SAN).
A
dedicated
storage
network
tailored
to
a
specific
environment,
combining
servers,
storage
products,
networking
products,
software,
and
services.
See
also
fabric.
Storage
Array
Identifier
(SAI
or
SA
Identifier).
The
Storage
Array
Identifier
is
the
identification
value
used
by
the
DS4000
Storage
Manager
host
software
(SMClient)
to
uniquely
identify
each
managed
storage
server.
The
DS4000
Storage
Manager
SMClient
program
maintains
Storage
Array
Identifier
records
of
previously-discovered
storage
servers
in
the
host
resident
file,
which
allows
it
to
retain
discovery
information
in
a
persistent
fashion.
storage
management
station.
A
system
that
is
used
to
manage
the
storage
subsystem.
A
storage
management
station
does
not
need
to
be
attached
to
the
storage
subsystem
through
the
fibre-channel
input/output
(I/O)
path.
storage
partition.
Storage
subsystem
logical
drives
that
are
visible
to
a
host
computer
or
are
shared
among
host
computers
that
are
part
of
a
host
group.
storage
partition
topology.
In
the
DS4000
Storage
Manager
client,
the
Topology
view
of
the
Mappings
window
displays
the
default
host
group,
the
defined
host
group,
the
host
computer,
and
host-port
nodes.
The
host
port,
host
computer,
and
host
group
topological
elements
must
be
defined
to
grant
access
to
host
computers
and
host
groups
using
logical
drive-to-LUN
mappings.
subnet.
An
interconnected
but
independent
segment
of
a
network
that
is
identified
by
its
Internet
Protocol
(IP)
address.
sweep
method.
A
method
of
sending
Simple
Network
Management
Protocol
(SNMP)
requests
for
information
to
all
the
devices
on
a
subnet
by
sending
the
request
to
every
device
in
the
network.
switch.
A
fibre-channel
device
that
provides
full
bandwidth
per
port
and
high-speed
routing
of
data
by
using
link-level
addressing.
switch
group.
A
switch
and
the
collection
of
devices
connected
to
it
that
are
not
in
other
groups.
Switch
groups
are
discovered
by
the
SANavigator
tool
and
displayed
with
a
gray
background
on
the
Physical
and
Data
Path
maps.
synchronous
write
mode.
In
remote
mirroring,
an
option
that
requires
the
primary
controller
to
wait
for
the
acknowledgment
of
a
write
operation
from
the
secondary
controller
before
returning
a
write
I/O
request
completion
to
the
host.
See
also
asynchronous
write
mode,
remote
mirroring,
Metro
Mirroring.
system
name.
Device
name
assigned
by
the
vendor’s
third-party
software.
TCP.
See
Transmission
Control
Protocol.
TCP/IP.
See
Transmission
Control
Protocol/Internet
Protocol.
terminate
and
stay
resident
program
(TSR
program).
A
program
that
installs
part
of
itself
as
an
extension
of
DOS
when
it
is
executed.
topology.
The
physical
or
logical
arrangement
of
devices
on
a
network.
The
three
fibre-channel
topologies
are
fabric,
arbitrated
loop,
and
point-to-point.
The
default
topology
for
the
disk
array
is
arbitrated
loop.
TL_port.
See
translated
loop
port.
transceiver.
A
device
that
is
used
to
transmit
and
receive
data.
Transceiver
is
an
abbreviation
of
transmitter-receiver.
translated
loop
port
(TL_port).
A
port
that
connects
to
a
private
loop
and
allows
connectivity
between
the
private
loop
devices
and
off
loop
devices
(devices
not
connected
to
that
particular
TL_port).
138
IBM
TotalStorage
DS4100
Storage
Server:
Installation,
User’s,
and
Maintenance
Guide