Location, Sfps, Fiber-optic – IBM Partner Pavilion DS4100 User Manual
Page 129: Cables
Note:
Avoid
operating
the
DS4100
with
controllers
of
different
cache
sizes.
Operating
the
storage
server
with
controllers
of
different
cache
size
will
disable
caching
and
might
adversely
affect
performance.
Always
verify
that
you
replace
a
failed
controller
with
a
controller
that
has
the
same
FRU
part
number.
To
replace
a
RAID
controller,
perform
the
following
steps:
1.
DS4100
single-controller
storage
server
only:
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.
2.
Check
the
DS4000
Storage
Manager
client
for
instructions
on
RAID
controller
failure-recovery
procedures.
Follow
the
steps
provided
in
the
software
documentation
before
continuing
with
the
following
step.
3.
Label
each
cable
that
connects
to
the
RAID
controller
that
has
failed.
This
ensures
that
all
cables
will
be
properly
reconnected
to
the
new
RAID
controller.
Attention:
Handle
and
install
fiber-optic
cables
properly
to
avoid
degraded
performance
or
loss
of
communications
with
devices.
When
working
with
fiber-optic
cables,
do
not
pinch
them,
step
on
them,
or
locate
them
in
aisles
or
walkways.
Do
not
overtighten
the
cable
straps
or
bend
the
cables
to
a
radius
smaller
than
38
mm
(1.5
in.).
4.
From
the
RAID
controller
that
has
failed,
remove
the
fibre-channel
cables
from
the
SFPs.
The
location
of
these
components
is
shown
in
After
removing
the
fibre-channel
cables,
insert
the
protective
caps.
5.
Use
the
following
procedure
to
remove
the
SFPs
from
the
RAID
controller
that
has
failed.
a.
Remove
the
LC-LC
fibre-channel
cable
from
the
SFP
module.
For
more
information,
see
SFP module
RAID controller
Fiber-optic
cable
f10ug041
Figure
71.
Location
of
SFPs
and
fiber-optic
cables
Chapter
5.
Installing
and
replacing
components
97