to
be
connected
to
other
drive
storage
expansion
enclosures
through
the
drive
loop
ports.
The
Server
ID
setting
is
only
valid
for
the
drive
loop.
The
amber
Conflict
LED
(located
on
the
right-side
of
the
switch)
will
be
lit
if
another
unit
in
the
drive
loop
has
the
same
ID
setting
as
the
server
ID.
Storage
expansion
enclosure
speed
settings
The
default
switch
setting
is
2
Gb
per
second.
Be
sure
that
you
have
read
to
determine
the
correct
operating
speed
before
you
complete
the
following
steps
to
access
and
enable
drive
operation
to
1
Gb
per
second.
Attention
Do
not
change
the
storage
expansion
enclosure
speed
setting
from
the
default
2
Gb/s
for
the
DS4000
EXP710.
2
Gb/s
is
the
only
storage
expansion
enclosure
speed
setting
allowed
for
the
DS4000
EXP710.
1.
Using
a
Phillips
screwdriver,
loosen
the
screw
that
secures
the
switch
cover
plate
to
the
storage
expansion
enclosure;
then,
remove
the
switch
cover
plate.
2.
To
enable
1
Gb
per
second
drive
operation,
press
on
the
left
side
of
the
switch
to
1
Gb/s
(when
set
to
1
Gb/s,
the
green
LED
to
the
right
of
the
switch
is
off).
3.
Replace
the
switch
cover
plate.
4.
Continue
with
Cabling
the
storage
expansion
enclosure
The
storage
expansion
enclosure
provides
ports
for
connections
to
two
redundant
drive
loops.
A
redundant
drive
storage
expansion
enclosure
loop
consists
of
one
or
more
storage
expansion
enclosures
connected
to
a
storage
server
using
two
sets
of
fibre
channel
cables.
If
one
fibre
channel
loop
fails,
the
storage
server
uses
the
other
drive
storage
expansion
enclosure
loop
to
maintain
input/output
to
the
storage
expansion
enclosure
array
group.
Usually,
there
are
two
RAID
controllers
in
a
storage
server.
Use
the
Fibre
Channel
Cabling
Instructions
that
comes
with
your
storage
server
for
the
specific
information
about
cabling
the
storage
expansion
enclosure.
Before
cabling
the
storage
expansion
enclosure,
read
the
following
information:
v
Fibre
channel
loop:
A
fibre
channel
loop
consists
of
fibre
channel
disk
drives
connected
to
each
other
and
to
one
or
more
RAID
controllers.
A
loop
can
support
multiple
RAID
controllers,
a
large
number
of
disk
drives,
and
other
addressable
entities
such
as
system-management
logic
chips.
Refer
to
your
storage
server
documentation
for
information
about
controller-dependent
hardware
configuration
details.
Some
controllers
might
have
restrictions
on
the
maximum
number
of
disk
drives
supported
on
a
loop,
cabling
restrictions,
and
other
requirements.
v
SFP
module
ports:
Your
storage
expansion
enclosure
supports
large,
complex,
and
redundant
disk
drive
loop
configurations.
Each
ESM
has
two
SFP
module
ports.
Each
SFP
module
has
an
input
and
output
port.
A
loop
is
created
by
connecting
one
or
more
storage
expansion
enclosures
to
one
or
more
RAID
controllers.
You
then
use
dual
fiber-optic
cables
to
connect
one
storage
expansion
enclosure
to
another.
v
Fibre
channel
cable
restrictions:
RAID
controllers
use
specific
IBM
fibre
channel
options.
Refer
to
the
Fibre
Channel
Cabling
Instructions
that
come
with
your
storage
server
for
the
cable
option
that
is
required
for
your
configuration.
Chapter
2.
Installing
and
cabling
the
storage
expansion
enclosure
31
Summary of Contents for TotalStorage DS4000 EXP710
Page 2: ......
Page 157: ......
Page 158: ... Part Number 25R0398 Printed in USA gc26 7735 00 1P P N 25R0398 ...
