Chapter
3.
Replacing
the
DS4500
Storage
Server
components
The
DS4500
Storage
Server
contains
two
RAID
controllers,
a
cooling
system
that
contain
four
fans,
mini
hubs,
SFP
modules,
and
a
power
system.
This
chapter
includes
detailed
instructions
on
how
to
replace
these
components.
Handling
static-sensitive
devices
Attention:
Static
electricity
can
damage
electronic
devices
and
your
system.
To
avoid
damage,
keep
static-sensitive
devices
in
their
static-protective
package
until
you
are
ready
to
install
them.
To
reduce
the
possibility
of
electrostatic
discharge,
observe
the
following
precautions:
v
Limit
your
movement.
Movement
can
cause
static
electricity
to
build
up
around
you.
v
Handle
the
device
carefully,
holding
it
by
its
edges
or
its
frame.
v
Do
not
touch
solder
joints,
pins,
or
exposed
printed
circuitry.
v
Do
not
leave
the
device
where
others
can
handle
and
possibly
damage
the
device.
v
While
the
device
is
still
in
its
static-protective
package,
touch
it
to
an
unpainted
metal
part
of
the
system
unit
for
at
least
two
seconds.
(This
drains
static
electricity
from
the
package
and
from
your
body.)
v
Remove
the
device
from
its
package
and
install
it
directly
into
your
system
unit
without
setting
it
down.
If
it
is
necessary
to
set
the
device
down,
place
it
in
its
static-protective
package.
Do
not
place
the
device
on
your
system
unit
cover
or
on
a
metal
table.
v
Take
additional
care
when
handling
devices
during
cold
weather
because
heating
reduces
indoor
humidity
and
increases
static
electricity.
DS4500
Storage
Server
controller
The
DS4500
Storage
Server
supports
RAID
technology.
The
DS4500
Storage
Server
contains
two
RAID
controllers.
Each
controller
comes
in
a
removable,
portable
unit,
called
a
controller
CRU,
as
shown
in
Figure
34
on
page
45.
Each
controller
CRU
slides
into
one
of
two
controller
slots
on
the
front
of
the
DS4500
Storage
Server
and
attaches
to
hosts
through
Fibre
Channel
connections.
Two
handles
lock
the
controller
in
place.
Each
controller
slot
has
a
controller
slot
designation
that
identifies
the
physical
location
of
the
controller
in
the
chassis:
controller
slot
A
(top)
or
controller
slot
B
(bottom).
Each
controller
CRU
has
ten
indicator
lights:
one
power,
one
fault,
and
eight
status
indicator
lights,
as
shown
in
Figure
33
on
page
44.
©
Copyright
IBM
Corp.
2005
43
Summary of Contents for TotalStorage DS4500
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