IBM 17011RS Maintenance Manual - Page 41

Monitoring, status, through, software, Using, diagnostic, hardware, Symptom-to-FRU, index

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For additional help when diagnosing problems with the DS400 storage subsystem, refer to the DS300 and DS400 Problem Determination Guide. Monitoring status through software Use the ServeRAID Manager program to monitor the status of the storage subsystem. Run the software constantly, and check it frequently. The ServeRAID Manager software provides the best way to diagnose and repair storage subsystem failures. The software can help you: v Determine the nature of the failure v Locate the failed component v Determine the recovery procedures to repair the failure For example, the recovery procedure for an IBM Predictive Failure Analysis (PFA) flag (impending drive failure) on a drive varies depending on the drive status (hot spare, unassigned, RAID level, current logical drive status, and so on). Depending on the circumstances, a PFA flag on a drive can indicate a high risk of data loss (if the drive is in a RAID 0 volume) or a minimal risk (if the drive is unassigned). Only the ServeRAID Manager software can identify the risk level and provide the necessary recovery procedures. Note: For PFA flags, the General-system-error LED and Drive fault LEDs do not turn on, so checking the LEDs will not notify you of the failure, even if the risk of data loss is high. Recovering from a storage subsystem failure might require you to perform procedures other than replacing the component (such as backing up the logical drive or failing a drive before you remove it). The ServeRAID Manager software gives these procedures. Attention: You might lose data if you do not follow the software recovery procedures. Using the diagnostic hardware You can order an ethernet wrap plug IBM CRU option (Part Number 00G2380). This wrap plug is used to perform the wrap-plug test and to identify DS300 and DS400 ethernet path problems. You can also order the fibre channel wrap plug kit (IBM Part Number 24P0950). This wrap plug kit is used to identify DS400 fibre channel path problems. See the DS300 and DS400 Problem Determination Guide for more information. Symptom-to-FRU index Use the ServeRAID Manager software to diagnose and repair storage subsystem failures. You can also use the following symptom-to-FRU index tables to find solutions to problems that have definite symptoms. v Table 6 on page 28 v Table 7 on page 29 v Table 8 on page 29 v Table 9 on page 31 Chapter 3. IBM TotalStorage DS400 type 1700 (models 1RS, 2RD) storage subsystem 27

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For
additional
help
when
diagnosing
problems
with
the
DS400
storage
subsystem,
refer
to
the
DS300
and
DS400
Problem
Determination
Guide
.
Monitoring
status
through
software
Use
the
ServeRAID
Manager
program
to
monitor
the
status
of
the
storage
subsystem.
Run
the
software
constantly,
and
check
it
frequently.
The
ServeRAID
Manager
software
provides
the
best
way
to
diagnose
and
repair
storage
subsystem
failures.
The
software
can
help
you:
v
Determine
the
nature
of
the
failure
v
Locate
the
failed
component
v
Determine
the
recovery
procedures
to
repair
the
failure
For
example,
the
recovery
procedure
for
an
IBM
Predictive
Failure
Analysis
(PFA)
flag
(impending
drive
failure)
on
a
drive
varies
depending
on
the
drive
status
(hot
spare,
unassigned,
RAID
level,
current
logical
drive
status,
and
so
on).
Depending
on
the
circumstances,
a
PFA
flag
on
a
drive
can
indicate
a
high
risk
of
data
loss
(if
the
drive
is
in
a
RAID
0
volume)
or
a
minimal
risk
(if
the
drive
is
unassigned).
Only
the
ServeRAID
Manager
software
can
identify
the
risk
level
and
provide
the
necessary
recovery
procedures.
Note:
For
PFA
flags,
the
General-system-error
LED
and
Drive
fault
LEDs
do
not
turn
on,
so
checking
the
LEDs
will
not
notify
you
of
the
failure,
even
if
the
risk
of
data
loss
is
high.
Recovering
from
a
storage
subsystem
failure
might
require
you
to
perform
procedures
other
than
replacing
the
component
(such
as
backing
up
the
logical
drive
or
failing
a
drive
before
you
remove
it).
The
ServeRAID
Manager
software
gives
these
procedures.
Attention:
You
might
lose
data
if
you
do
not
follow
the
software
recovery
procedures.
Using
the
diagnostic
hardware
You
can
order
an
ethernet
wrap
plug
IBM
CRU
option
(Part
Number
00G2380).
This
wrap
plug
is
used
to
perform
the
wrap-plug
test
and
to
identify
DS300
and
DS400
ethernet
path
problems.
You
can
also
order
the
fibre
channel
wrap
plug
kit
(IBM
Part
Number
24P0950).
This
wrap
plug
kit
is
used
to
identify
DS400
fibre
channel
path
problems.
See
the
DS300
and
DS400
Problem
Determination
Guide
for
more
information.
Symptom-to-FRU
index
Use
the
ServeRAID
Manager
software
to
diagnose
and
repair
storage
subsystem
failures.
You
can
also
use
the
following
symptom-to-FRU
index
tables
to
find
solutions
to
problems
that
have
definite
symptoms.
v
Table
6
on
page
28
v
Table
7
on
page
29
v
Table
8
on
page
29
v
Table
9
on
page
31
Chapter
3.
IBM
TotalStorage
DS400
type
1700
(models
1RS,
2RD)
storage
subsystem
27