v
Levers:
When
you
remove
or
install
a
power
supply
CRU,
the
levers
located
at
the
top
of
the
power
supply
CRU
must
be
unlocked.
v
Power
LEDs:
These
green
power
LEDs
are
lit
when
the
storage
expansion
enclosure
is
turned
on
and
receiving
ac
power.
v
Fault
LED:
The
amber
power-supply
fault
LED
is
lit
if
a
power-supply
failure
occurs.
v
Power
switches:
The
power
switches
are
used
to
turn
the
power
supplies
on
and
off.
You
must
turn
on
both
switches
to
use
the
redundant
power
supplies.
v
AC
power
connectors:
To
provide
ac
power
to
the
storage
expansion
enclosure,
power
cables
must
be
connected
to
the
ac
power
connectors
located
on
the
back
of
the
storage
expansion
enclosure.
v
Hot-swap
power-supply
CRUs:
The
two
hot-swap
power
supplies
are
located
on
the
back
of
the
storage
expansion
enclosure.
Both
power-supply
CRUs
must
be
installed,
even
if
one
power
supply
is
not
working.
Fan
controls
and
indicators
The
storage
expansion
enclosure
comes
with
two
fan
units.
Each
storage
expansion
enclosure
has
two
fans
as
shown
in
The
fan
units
in
your
storage
expansion
enclosure
are
hot-swappable
and
redundant.
One
fan
will
continue
to
operate
if
the
other
fan
fails.
You
can
remove
and
replace
the
fan
unit
while
the
storage
expansion
enclosure
is
powered
on
and
accessing
drives.
Each
fan
has
a
temperature
sensor
built
into
the
air
inlet.
This
sensor
maintains
fan
speed
to
provide
the
necessary
air
flow.
If
the
speed
of
one
of
the
fans
drops
to
a
level
that
is
too
low
or
stops,
the
Fault
LED
located
on
the
back
of
the
fan
unit
is
lit,
and
the
General
system
error
LED
on
the
front
of
the
storage
expansion
enclosure
is
lit.
For
the
locations
of
the
LEDs
on
the
front
of
the
storage
expansion
enclosure,
see
For
the
LEDs
on
the
back
of
the
storage
expansion
enclosure,
see
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.
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
Power switches
Power LEDs
Fault LEDs
Levers
AC power
connectors
Power supply CRUs
e
xp70006
Figure
5.
Power-supply
controls,
indicators,
and
connectors
Chapter
1.
Introduction
9
Summary of Contents for TotalStorage DS4000 EXP710
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