4.
Repeat
step
1
through
step
3
to
replace
the
second
fan.
Replacing
a
hard
disk
drive
Complete
the
following
steps
to
replace
the
hot-swap
hard
disk
drives
that
you
removed
before
the
installation.
Attention:
After
you
remove
a
drive
CRU,
wait
70
seconds
before
replacing
or
reseating
the
drive
CRU
to
allow
the
drive
to
properly
spin
down.
Failure
to
do
so
may
cause
undesired
events.
Note:
Use
to
verify
the
proper
replacement
locations
of
your
1.5
Gbps
SATA
hard
disk
drives.
1.
Lift
up
on
the
handle
and
gently
push
the
drive
CRU
into
the
empty
bay
until
the
hinge
of
the
tray
handle
latches
beneath
the
expansion
enclosure
bezel.
2.
Push
the
tray
handle
down
until
the
latch
clicks
into
place.
3.
Repeat
step
1
and
step
2
to
replace
additional
drives.
Setting
the
interface
options
The
EXP100
has
two
enclosure
ID
switches
that
identify
the
EXP100
on
a
Fibre
Channel
loop
and
that
assign
physical
addresses
to
the
drives.
The
enclosure
ID
switches
are
located
on
the
back
of
the
expansion
enclosure,
as
shown
in
Fibre
Channel
loop
and
ID
settings
When
you
install
a
hard
disk
drive
in
the
expansion
enclosure,
the
drive
tray
plugs
into
a
printed
circuit
board
called
the
midplane
.
The
midplane
sets
the
Fibre
Channel
loop
ID
automatically,
based
on
the
enclosure
ID
switch
setting
and
the
physical
location
(bay)
of
the
hard
disk
drive.
Enclosure
ID
settings
Enclosure
ID
switch
settings
(values
0
-
7)
set
various
addresses
and
IDs.
Use
enclosure
ID
switch
X1
to
set
the
ones
position,
and
use
enclosure
ID
switch
X10
to
set
the
tens
position.
The
settings
of
the
two
enclosure
ID
switches,
when
used
together,
provide
a
two-digit
ID
of
the
expansion
enclosure.
The
storage
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
Green LED
Amber LED
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
Figure
26.
Enclosure
ID
switches
44
IBM
TotalStorage
DS4000
EXP100
Storage
Expansion
Enclosure:
Installation,
User’s
and
Maintenance
Guide
Summary of Contents for TotalStorage EXP100
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