Important:
1.
The
serial
interface
ports
are
intended
to
be
used
by
service
technicians
to
perform
diagnostic
operations
on
the
storage
server.
Incorrect
use
of
the
serial
port
can
result
in
loss
of
data
access
and,
in
some
cases,
in
loss
of
data.
2.
Do
not
connect
the
DS4100
in
a
public
LAN
or
public
subnet.
Use
a
local
private
network
for
the
DS4100
storage
server
and
the
management
station
Ethernet
ports.
3.
To
ensure
proper
EMI
shielding,
always
use
quality
shielded
serial
cables.
Connecting
secondary
interface
cables
to
a
DS4100
base
storage
server
Connect
a
pair
of
Ethernet
cables
from
the
storage-management
station
to
the
Ethernet
ports
for
Controller
A
(located
on
the
left)
and
Controller
B
(located
on
the
right)
on
the
back
of
the
storage
server.
Figure
52
shows
the
location
of
the
ports.
Connecting
secondary
interface
cables
to
a
DS4100
single-controller
storage
server
Connect
an
Ethernet
cable
from
the
storage-management
station
to
the
Ethernet
port
of
the
controller.
Connecting
expansion
units
(base
storage
server
only)
Attention:
The
minimum
DS4000
EXP100
ESM
firmware
level
(9554
or
later)
is
required
before
attaching
a
DS4000
EXP100
to
the
DS4100
base
storage
server.
Refer
to
the
section
“Replacing
a
failed
hot-swap
ESM”
in
the
IBM
TotalStorage
DS4000
EXP100
Storage
Expansion
Unit
Installation,
User’s,
and
Maintenance
Guide
for
details
on
how
to
identify
ESM
firmware
levels.
You
cannot
connect
expansion
units
to
the
DS4100
single-controller
storage
server.
If
you
are
using
the
DS4100
single-controller
storage
server,
skip
this
section.
Please
contact
your
IBM
support
representative
for
information
about
the
availability
of
such
support
in
the
future.
Controller A
Ethernet port
Controller A
Serial port
Controller B
Serial port
Controller B
Ethernet port
f10ug030
Figure
52.
Ethernet
and
serial
port
locations
Chapter
3.
Cabling
the
storage
server
57
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