Working with raid controllers, Working, With – IBM Partner Pavilion DS4100 User Manual
Page 126: Raid, Controllers
power
to
the
storage
server.
Go
to
and
follow
the
procedure
described
there
before
proceeding
with
the
following
step.
9.
Make
sure
that
the
green
Power
LED
on
the
new
power-supply
CRU
is
on
and
the
amber
Fault
LED
is
off.
v
If
the
Power
LED
is
off,
the
power-supply
CRU
might
not
be
installed
correctly.
Remove
it
and
then
reinstall
it.
v
If
the
Fault
LED
is
on
or
the
Power
LED
stays
off,
test
the
power
source
to
verify
that
the
outlet
is
working
properly.
For
more
information
about
the
LEDs,
see
Working
with
RAID
controllers
The
DS4100
base
storage
server
operates
with
two
RAID
controllers
that
can
be
hot-swapped.
The
DS4100
single-controller
storage
server
has
only
one
RAID
controller.
If
you
are
replacing
a
failed
RAID
controller
in
the
DS4100
single-controller
storage
server,
you
do
not
need
to
power
down
the
DS4100
before
replacing
the
RAID
controller.
If
you
are
replacing
a
functioning
(non-failed)
RAID
controller
in
the
DS4100
single-controller
storage
server,
do
not
remove
or
replace
the
RAID
controller
in
the
DS4100
single-controller
storage
server
without
first
stopping
the
host
applications,
unmounting
the
logical
drives
from
the
host
server,
and
powering
down
the
storage
subsystem.
Attention:
Before
you
replace
a
RAID
controller,
verify
that
the
replacement
RAID
controller
part
number
match
the
part
number
of
the
RAID
controller
be
replaced.
Each
RAID
controller
fits
into
the
back
of
the
storage
server
and
has
the
following
components:
v
Battery
v
Cache
memory
v
Two
host
ports
and
one
expansion
port
Note:
The
expansion
port
is
inactive
in
the
DS4100
single-controller
storage
server.
v
One
Ethernet
port
v
One
serial
port
Each
RAID
controller
has
a
unique
hardware
Ethernet
address,
which
is
printed
on
a
label
on
the
front.
There
is
also
a
label
giving
the
cache
battery
manufacturing
and
installation
dates
on
the
top
of
the
controller
unit.
shows
the
location
of
these
items.
Important:
Please
read
the
following
information
before
replacing
a
RAID
controller.
v
The
cache
battery
is
not
included
with
the
controller
CRU.
v
To
provide
full
functionality
in
a
DS4100
base
storage
server,
the
two
controllers
must
have
the
same
memory
capacity.
To
ensure
that
you
replace
the
failed
controller
with
an
appropriate
replacement
controller,
verify
that
the
FRU
number
of
the
replacement
controller
matches
the
FRU
number
of
the
failed
controller.
There
are
no
protection
mechanisms
to
block
out
an
incorrect
CRU
from
being
94
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