The
ESM
LED
positions
are
changed
slightly
in
the
EXP710,
as
shown
in
v
SFP
module
input/output
ports:
Each
ESM
has
two
SFP
module
connector
ports
for
connecting
your
storage
expansion
enclosure
to
the
controller
or
connecting
two
or
more
storage
expansion
enclosures
together.
Install
an
SFP
module
into
the
input
and
output
ports.
Fibre
channel
cables
are
used
to
connect
the
storage
expansion
enclosure
to
the
controller
or
to
additional
storage
expansion
enclosures.
v
ESM
latch:
The
ESM
latch
secures
the
ESM
to
the
storage
expansion
enclosure.
v
ESM
levers:
The
ESM
latch
must
be
unlocked
before
you
can
use
the
ESM
levers
to
remove
the
ESM
from
the
storage
expansion
enclosure.
When
you
are
installing
the
ESM
into
the
bay,
use
the
ESM
levers
to
guide
the
unit
into
the
ESM
bay.
v
ESMs:
The
ESMs
contain
the
storage
expansion
enclosure
controls,
switches,
and
LEDs.
Each
ESM
has
two
SFP
module
ports
for
connecting
the
storage
expansion
enclosure
to
the
controller.
v
Fault
LED:
The
amber
ESM
fault
LED
is
lit
when
an
ESM
failure
occurs.
v
Input/output
bypass
LEDs:
These
amber
LEDs
are
lit
when
a
faulty
SFP
module
or
fiber-optic
cable
is
installed.
Both
ports
on
the
ESM
are
bypassed
and
the
LEDs
are
lit
in
the
event
of
an
ESM
fault.
In
this
case,
the
ESM
fault
error
LED
is
also
lit.
This
LED
is
also
lit
if
an
SFP
module
is
installed
and
not
connected
to
another
device.
v
Power
LED:
The
green
power
LED
is
lit
when
there
is
power
to
the
ESM.
v
Over-temperature
LED:
The
ESM
amber
LED
is
lit
if
the
storage
expansion
enclosure
overheats.
v
Enclosure
ID
switches:
Two
enclosure
ID
switches
(x1
and
x10)
are
located
between
the
power
supplies
at
the
rear
of
the
storage
expansion
enclosure.
These
switches
are
used
to
identify
the
storage
expansion
enclosure
on
a
fibre
channel
loop
and
to
assign
physical
addresses
to
the
drives.
The
enclosure
ID
switch
settings
for
each
digit
range
from
0
through
7.
Attention:
When
connecting
storage
expansion
enclosures
to
storage
servers,
it
is
recommended
that
you
use
only
the
ones
digit
(x1)
setting
to
set
unique
server
IDs
or
enclosure
IDs.
For
more
information,
see
v
1
Gb/s
2
Gb/s
switch:
Use
the
1
Gb/s
2
Gb/s
switch
located
on
the
back
of
the
storage
expansion
enclosure
to
enable
drive
operation.
The
default
setting
is
2
Gb/s.
Your
switch
setting
will
depend
on
your
system
configuration.
Output bypass LED
Over-temperature LED
Fault LED
Power LED
Input bypass LED
e
xp70004c
Figure
8.
ESM
LEDs
on
the
DS4000
EXP710
Chapter
1.
Introduction
11
Summary of Contents for TotalStorage DS4000 EXP710
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