The
storage
expansion
enclosure
supports
up
to
14
DS4000
2
Gb/s
fibre
channel
hard
disk
drives
or
later
versions.
These
drives
come
preinstalled
in
drive
trays.
This
drive-and-tray
assembly
is
called
a
drive
CRU.
You
install
the
drive
CRUs
in
the
14
drive
bays
on
the
front
of
the
storage
expansion
enclosure.
Note:
DS4000
2
Gb/s
fibre
channel
hard
disk
drives
must
be
used
in
the
storage
expansion
enclosure
even
if
the
system
is
set
to
a
1
Gb
per
second
rate.
1
Gb/s
hard
disk
drives
are
not
supported.
Attention:
Never
hot-swap
a
drive
CRU
when
its
green
Activity
LED
is
flashing.
Hot-swap
a
drive
CRU
when
its
amber
Fault
LED
is
lit
and
not
flashing
or
when
the
drive
is
inactive
and
the
green
Activity
LED
is
lit
and
not
flashing.
If
the
drive
is
not
in
a
failed
state
(as
indicated
by
its
lit
amber
LED),
manually
fail
the
drive
using
the
Storage
Management
client
before
attempting
to
remove
it
from
the
drive
slot.
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.
Fan,
ESM,
and
power-supply
bays
The
location
of
the
hot-swap
fan
bays,
hot-swap
ESM
bays,
and
hot-swap
power
supply
bays
are
shown
in
v
Hot-swap
fan
bays:
Your
storage
expansion
enclosure
comes
with
two
interchangeable
hot-swap
and
redundant
fan
units.
These
two
fan
units
are
located
in
the
hot-swap
fan
bays.
Each
fan
unit
contains
two
fans.
If
one
fan
unit
fails,
the
second
fan
unit
continues
to
operate.
Both
fan
units
must
be
installed
to
maintain
proper
cooling
within
your
storage
expansion
enclosure,
even
if
one
fan
unit
is
not
operational.
Attention:
The
fans
in
your
storage
expansion
enclosure
draw
in
fresh
air
and
force
out
hot
air.
These
fans
are
hot-swappable
and
redundant;
however,
when
one
fan
fails,
the
failed
fan
unit
must
be
replaced
within
48
hours
to
maintain
redundancy
and
optimum
cooling.
When
you
remove
the
failed
unit,
be
sure
to
install
the
replacement
fan
unit
within
10
minutes
to
prevent
overheating.
v
ESM
bays:
Your
storage
expansion
enclosure
comes
with
two
hot-swappable
ESMs,
which
are
located
in
the
ESM
bays.
The
ESMs
monitor
the
overall
status
of
the
storage
expansion
enclosure.
The
DS4000
EXP700
ESMs
provide
a
1
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
ESM bays
ESM latches
Hot-swap fan bays
Hot-swap power
supply bays
e
xp70002
Figure
3.
Hot-swap
fan,
ESM,
and
power
supply
bays
6
IBM
TotalStorage
DS4000
EXP700
and
EXP710
Storage
Expansion
Enclosures:
Installation,
User’s,
and
Maintenance
Guide
Summary of Contents for TotalStorage DS4000 EXP710
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