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Table
47.
DS4500
storage
server
host-side
and
drive-side
mini
hub
indicator
lights
(continued)
Icon
Indicator
light
Color
Normal
operation
Problem
indicator
Possible
condition
indicated
by
the
problem
indicator
Bypass
(lower
port)
Amber
Off
On
v
Lower
mini
hub
port
is
bypassed;
there
are
no
devices
connected.
v
Mini
hub
or
SFP
module
failed
or
is
loose.
v
Fiber-optic
cables
are
damaged.
Note:
When
two
functioning
SFP
modules
are
installed
into
the
mini
hub
port
and
no
fibre
channel
cables
are
connected
to
them,
the
bypass
indicator
light
is
lit.
If
only
one
functioning
SFP
module
is
installed
in
a
host-side
mini
hub
and
no
fibre
channel
cables
are
connected
to
it,
the
indicator
light
is
not
lit.
However,
the
drive-side
mini
hub
bypass
indicator
light
will
be
lit
when
one
functioning
SFP
module
is
installed
in
the
mini
hub
port
and
the
mini
hub
has
no
fibre
channel
cables
connected
to
it.
Using
the
diagnostic
hardware
The
DS4500
storage
server
comes
with
a
wrap-plug
adapter
and
LC
coupler.
The
wrap-plug
adapter
and
LC
coupler
are
used
to
identify
fibre
path
problems.
The
loopback
and
sendEcho
tests
are
described
in
the
IBM
TotalStorage
DS4000
Problem
Determination
Guide
.
Symptom-to-FRU
index
The
Symptom-to-FRU
index
(Table
48)
lists
symptoms
and
the
possible
causes.
The
most
likely
cause
is
listed
first.
The
problem
determination
(PD)
maps
found
in
the
IBM
TotalStorage
DS4000
Problem
Determination
Guide
provide
you
with
additional
diagnostic
aids.
Table
48.
Symptom-to-FRU
index
for
DS4500
RAID
controller
Problem
Action/FRU
Controller
LED
(front
cover)
is
on.
1.
Reseat
Controller
CRU.
2.
Place
Controller
online
using
DS4000
Storage
Manager
GUI.
3.
If
in
passive
mode,
check
Fibre
path/SFP.
4.
Controller
CRU
Chapter
11.
Type
1742
DS4500
Storage
Server
101
Summary of Contents for System Storage DS4000
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