IBM 84903bu User Manual - Page 80

Intermittent, problems

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v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Symptom Action The server stops responding during the hard disk drive diagnostic test. Remove the hard disk drive that was being tested when the server stopped responding, and run the diagnostic test again. If the hard disk drive diagnostic test runs successfully, replace the drive that you removed with a new one. A hard disk drive was not detected while the operating system was being started. Reseat all hard disk drives and cables; then, run the hard disk drive diagnostic tests again. A hard disk drive passes the diagnostic Fixed Disk Test but the problem remains. Run the diagnostic SCSI Fixed Disk Test (see "Running the diagnostic programs" in the Problem Determination and Service Guide on the IBM xSeries Documentation CD). Note: This test is not available on servers that have RAID arrays or servers that have SATA hard disk drives. Use the Fixed Disk Test for SATA hard disk drives or servers that have RAID arrays. Intermittent problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Symptom Action A problem occurs only occasionally and is difficult to diagnose. 1. Make sure that: v All cables and cords are connected securely to the rear of the server and attached devices. v When the server is turned on, air is flowing from the fan grille. If there is no airflow, the fan is not working. This can cause the server to overheat and shut down. 2. Check the system/event error log (see "Error logs" in the Problem Determination and Service Guide on the IBM xSeries Documentation CD). 66 xSeries 206m Types 8485 and 8490: Installation Guide

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v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
the
parts
listing
in
the
Problem
Determination
and
Service
Guide
to
determine
which
components
are
customer
replaceable
units
(CRU)
and
which
components
are
field
replaceable
units
(FRU).
v
If
an
action
step
is
preceded
by
“(Trained
service
technician
only),”
that
step
must
be
performed
only
by
a
trained
service
technician.
Symptom
Action
The
server
stops
responding
during
the
hard
disk
drive
diagnostic
test.
Remove
the
hard
disk
drive
that
was
being
tested
when
the
server
stopped
responding,
and
run
the
diagnostic
test
again.
If
the
hard
disk
drive
diagnostic
test
runs
successfully,
replace
the
drive
that
you
removed
with
a
new
one.
A
hard
disk
drive
was
not
detected
while
the
operating
system
was
being
started.
Reseat
all
hard
disk
drives
and
cables;
then,
run
the
hard
disk
drive
diagnostic
tests
again.
A
hard
disk
drive
passes
the
diagnostic
Fixed
Disk
Test
but
the
problem
remains.
Run
the
diagnostic
SCSI
Fixed
Disk
Test
(see
“Running
the
diagnostic
programs”
in
the
Problem
Determination
and
Service
Guide
on
the
IBM
xSeries
Documentation
CD).
Note:
This
test
is
not
available
on
servers
that
have
RAID
arrays
or
servers
that
have
SATA
hard
disk
drives.
Use
the
Fixed
Disk
Test
for
SATA
hard
disk
drives
or
servers
that
have
RAID
arrays.
Intermittent
problems
v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
the
parts
listing
in
the
Problem
Determination
and
Service
Guide
to
determine
which
components
are
customer
replaceable
units
(CRU)
and
which
components
are
field
replaceable
units
(FRU).
v
If
an
action
step
is
preceded
by
“(Trained
service
technician
only),”
that
step
must
be
performed
only
by
a
trained
service
technician.
Symptom
Action
A
problem
occurs
only
occasionally
and
is
difficult
to
diagnose.
1.
Make
sure
that:
v
All
cables
and
cords
are
connected
securely
to
the
rear
of
the
server
and
attached
devices.
v
When
the
server
is
turned
on,
air
is
flowing
from
the
fan
grille.
If
there
is
no
airflow,
the
fan
is
not
working.
This
can
cause
the
server
to
overheat
and
shut
down.
2.
Check
the
system/event
error
log
(see
“Error
logs”
in
the
Problem
Determination
and
Service
Guide
on
the
IBM
xSeries
Documentation
CD).
66
xSeries
206m
Types
8485
and
8490:
Installation
Guide