IBM totalstorage ds4500 User Manual
2.
Connect
drive
loop
B
to
the
DS4500
Storage
Subsystem,
as
shown
in
Starting
with
the
first
storage
expansion
enclosure
in
the
loop,
connect
the
Out
port
on
the
right
ESM
board
to
the
In
(lower)
port
on
drive
mini
hub
2.
Leave
the
In
port
on
the
right
ESM
board
on
the
last
storage
expansion
enclosure
and
the
Out
(upper)
port
on
drive
mini
hub
2
unoccupied.
To
connect
a
second
redundant
storage
expansion
enclosure
group
to
the
DS4500
Storage
Subsystem,
continue
with
Step
3.
Connect
drive
loop
C
to
the
DS4500
Storage
Subsystem,
as
shown
in
Starting
with
the
first
storage
expansion
enclosure
in
storage
expansion
enclosure
group
2,
connect
the
In
port
on
the
left
ESM
board
to
the
Out
(upper)
port
on
drive
mini
hub
3.
Leave
the
Out
port
on
the
left
ESM
board
on
the
last
storage
expansion
enclosure
in
storage
expansion
enclosure
group
2
and
the
In
(lower)
port
on
the
drive
mini
hub
3
unoccupied.
4.
Connect
drive
loop
D
to
the
DS4500
Storage
Subsystem,
as
shown
in
Starting
with
the
last
storage
expansion
enclosure
in
storage
expansion
enclosure
group
2,
connect
the
Out
port
on
the
right
ESM
board
to
the
In
(lower)
port
on
mini
hub
1.
Loop A Fibre Channel cables
Out port on drive
mini hub 4
mini hub 4
Last s
torage expansion
enclosure
First s
torage expansion
enclosure
Figure
14.
Connecting
drive
loop
A
to
the
DS4500
Storage
Subsystem
Loop B Fibre Channel cables
In port on drive
mini hub 2
mini hub 2
Last storage expansion
enclosure
enclosure
First storage expansion
enclosure
enclosure
d3nu4044b
Figure
15.
Connecting
redundant
drive
loops
to
the
DS4500
Storage
Subsystem
14