Note:
See
“MAP
5800:
Light
path”
in
the
IBM
System
Storage
SAN
Volume
Controller:
Service
Guide
to
help
you
to
isolate
the
faulty
FRU.
A
system-led
error
LED
is
also
on
the
rear
of
the
SAN
Volume
Controller.
Information-Error
LED
When
the
information-error
LED
is
lit,
a
non-critical
event
has
occurred.
Check
the
light
path
diagnostics
panel
and
the
error
log.
Light
path
diagnostics
are
described
in
more
detail
in
the
light
path
maintenance
analysis
procedure
(MAP).
Location
LED
The
SAN
Volume
Controller
does
not
use
the
location
LED.
Hard
disk
drive
activity
LED
When
it
is
lit,
the
green
hard
disk
drive
activity
LED
indicates
that
the
hard
disk
drive
is
in
use.
Power
LED
The
green
power
LED
indicates
the
power
status
of
the
SAN
Volume
Controller.
The
properties
of
the
green
power
LED
are
as
follows:
Off
One
or
more
of
the
following
are
true:
v
No
power
is
present
at
the
power
supply
input
v
The
power
supply
has
failed
v
The
LED
has
failed
On
The
SAN
Volume
Controller
is
powered
on.
Flashing
The
SAN
Volume
Controller
is
turned
off
but
is
still
connected
to
a
power
source.
Note:
A
power
LED
is
also
on
the
rear
of
the
server.
Power
control
button
The
power
control
button
switches
on
or
switches
off
the
main
power
to
the
SAN
Volume
Controller.
To
turn
on
the
power,
press
and
release
the
power
control
button.
To
turn
off
the
power,
press
and
release
the
power
control
button.
For
more
information
about
how
to
power
off
the
SAN
Volume
Controller
node,
see
“MAP
5350:
Powering
off
a
SAN
Volume
Controller
node”
in
the
IBM
System
Storage
SAN
Volume
Controller:
Service
Guide
.
Note:
When
the
node
is
operational
and
the
power
control
button
is
pressed,
the
SAN
Volume
Controller
indicates
on
its
front
panel
that
it
is
powering
off
and
writes
its
control
data
to
its
internal
disk.
This
can
take
up
to
five
minutes.
If
the
power
control
button
is
pressed
and
not
released,
an
immediate
power
off
is
performed
without
writing
the
SAN
Volume
Controller
control
data
to
disk.
Service
actions
are
then
required
to
make
the
SAN
Volume
Controller
operational
again.
Therefore,
when
powering
off,
you
should
not
press
and
hold
the
power
control
button
for
more
than
two
seconds.
Chapter
2.
SAN
Volume
Controller
overview
9
Summary of Contents for 2145UPS-1U
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