Chapter
6.
Solving
problems
This
chapter
contains
information
to
help
you
solve
some
of
the
simpler
problems
that
you
might
have
with
your
storage
subsystem.
It
contains
the
problem
indicators
and
error
messages
along
with
suggested
actions
to
take
to
resolve
the
problem.
For
instructions
on
how
to
obtain
service
and
technical
assistance
for
your
storage
subsystem
and
other
IBM
products,
see
“Getting
information,
help,
and
service”
on
page
xxii
Note:
See
the
IBM
TotalStorage
DS4000
Hardware
Maintenance
Manual
and
Problem
Determination
Guide
for
additional
troubleshooting
and
debugging
procedures.
General
checkout
Use
the
LEDs,
the
diagnostics
and
test
information,
and
the
Symptom-to-FRU
index
to
diagnose
problems.
The
PD
maps
found
in
the
IBM
TotalStorage
DS4000
Problem
Determination
Guide
provide
you
with
additional
diagnostic
aids.
Using
the
diagnostic
hardware
The
DS4300
Storage
Subsystem
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
.
Troubleshooting
This
section
contains
information
to
help
you
solve
some
of
the
problems
you
might
have
with
your
storage
subsystem.
Table
17
contains
the
problem
symptoms
and
error
messages,
along
with
suggested
actions
to
take
to
resolve
problems.
Always
use
the
DS4000
Storage
Manager
client
to
diagnose
storage
subsystem
problems
and
component
failures
and
find
solutions
to
problems
that
have
definite
symptoms.
You
can
use
Table
6
which
contains
the
problem
symptoms,
along
with
suggested
actions
as
a
guide
for
troubleshooting
problems
in
addition
to
the
DS4000
Storage
Manager
Recovery
Guru
in
the
Subsystem
Management
window.
Do
not
rely
solely
on
Table
17
for
a
FRU
replacement
decision.
In
addition,
do
not
contact
IBM
Support
unless
the
problem
persists
or
the
problem
can
not
be
troubleshot
using
the
information
in
Table
17
or
the
Recovery
Guru
procedures
as
displayed
in
the
DS4000
storage
manager
subsystem
management
window.
Table
17.
Storage
subsystem
troubleshooting
Problem
indicator
Component
Possible
cause
Possible
solutions
Amber
LED
on
Drive
CRU
Drive
failure
Replace
the
drive
that
has
failed.
Fan
CRU
Fan
failure
Replace
the
fan
that
has
failed.
©
Copyright
IBM
Corp.
2005,
2006
145
Summary of Contents for TotalStorage DS4300 Turbo
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