7.
Whether
you
are
upgrading
one
or
multiple
DS4000
EXP700s
in
the
disconnected
drive
loop,
complete
the
disconnection,
upgrade,
and
reconnection
process
described
in
the
following
steps
for
each
ESM
in
the
disconnected
drive
loop
before
upgrading
the
ESM
in
the
next
storage
expansion
enclosure.
Disconnecting,
upgrading,
and
reconnecting
one
ESM
at
time
greatly
reduces
the
possibility
of
making
a
fibre
channel
cabling
error.
a.
Disconnect
any
fibre
channel
cables
from
the
first
ESM
(marked
3
in
that
you
will
replace
in
the
disconnected
drive
loop.
Leave
in
place
the
fibre
channel
cables
connected
to
the
other
ESMs
in
the
disconnected
drive
loop.
In
the
cable
to
be
removed
is
shown
with
dashed
lines
and
marked
2
.
b.
Replace
the
disconnected
DS4000
EXP700
ESM
(marked
3
in
with
one
of
the
upgrade
ESMs
you
received
in
the
DS4000
EXP700
Models
1RU/1RX
Switched-ESM
Option
Upgrade
Kit.
Follow
the
steps
for
replacing
an
ESM
in
c.
Reconnect
the
fibre
channel
cables
to
the
ESM
that
you
replaced.
Do
not
reconnect
the
cable
to
the
storage
server
controller
drive
port
that
you
disconnected
in
step
d.
Repeat
steps
a
through
c
for
each
DS4000
EXP700
that
you
are
upgrading
(for
the
ESMs
in
the
disconnected
drive
loop
only).
Complete
the
process
for
each
DS4000
EXP700
before
you
continue
with
the
next
storage
expansion
enclosure.
8.
After
you
have
upgraded
and
reconnected
each
ESM
in
the
drive
loop,
reconnect
the
fibre
channel
cable
from
the
controller
drive
port
to
the
first
4
Left ESM board
Input
Last expansion unit
First expansion unit
DS4300 Storage Server
with two RAID controllers
Second expansion unit
Loop B Fibre Channel
interface cable
Loop A Fibre Channel
interface cable
Output
Output
Right ESM board
Controller B drive port
Controller A drive port
3
e
xp71hot2
Figure
61.
Disconnect
the
remaining
fibre
channel
cables
from
the
first
ESM
in
the
disconnected
drive
loop
90
IBM
TotalStorage
DS4000
EXP700
and
EXP710
Storage
Expansion
Enclosures:
Installation,
User’s,
and
Maintenance
Guide
Summary of Contents for TotalStorage DS4000 EXP710
Page 2: ......
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