Checking the leds, Checking, Leds – IBM Partner Pavilion DS4100 User Manual
Page 103
v
Locate
the
failed
component
v
Determine
the
recovery
procedures
to
repair
the
failure
Although
the
storage
server
has
fault
LEDs,
these
lights
do
not
necessarily
indicate
which
component
has
failed
or
needs
to
be
replaced,
or
which
type
of
recovery
procedure
you
must
perform.
In
some
cases
(such
as
loss
of
redundancy
in
various
components),
the
fault
LED
does
not
turn
on.
Only
the
DS4000
Storage
Manager
client
can
detect
the
failure.
For
example,
the
recovery
procedure
for
a
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
DS4000
Storage
Manager
client
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-server
failure
might
require
you
to
perform
procedures
other
than
replacing
the
component
(such
as
backing
up
the
logical
drive
or
failing
a
drive
before
removing
it).
The
DS4000
Storage
Manager
client
gives
these
procedures.
Attention:
Not
following
the
software-recovery
procedures
can
result
in
data
loss.
Checking
the
LEDs
The
LEDs
display
the
status
of
the
storage
server
and
components.
Green
LEDs
indicate
a
normal
operating
status;
amber
LEDs
indicate
a
possible
failure.
It
is
important
to
check
all
the
LEDs
on
the
front
and
back
of
the
storage
server
when
you
turn
on
the
power.
In
addition
to
checking
for
faults,
you
can
use
the
LEDs
on
the
front
of
the
storage
server
to
determine
if
the
drives
are
responding
to
I/O
transmissions
from
the
host.
For
information
about
the
LEDs
on
the
front
of
the
storage
server,
see:
v
v
For
information
about
the
LEDs
on
the
back
of
the
storage
server,
see:
v
v
v
Chapter
4.
Operating
the
storage
server
71