IBM BladeCenter T Type 8720 User Manual
Page 22
System
status
LEDs:
The
LEDs
on
this
part
of
the
panel
provide
status
information
for
the
BladeCenter
T
unit.
v
Power:
When
continuously
lit,
this
green
LED
indicates
the
presence
of
power
in
the
BladeCenter
T
unit.
The
LED
turns
off
when
the
power
source
is
interrupted.
Attention:
If
the
power
LED
is
off,
it
does
not
mean
electrical
power
is
not
present
in
the
BladeCenter
T
unit.
The
LED
might
be
burned
out.
To
remove
all
electrical
power
from
the
BladeCenter
T
unit,
you
must
disconnect
all
power
cords
from
the
rear
of
the
BladeCenter
T
unit.
v
Location:
This
blue
LED
is
for
system
identification.
A
system
administrator
or
servicer
uses
this
LED
to
locate
a
specific
BladeCenter
T
unit
for
service
or
repair.
You
can
turn
off
the
location
LED
through
the
Web
interface
or
a
remote
management
console.
Alarm
LEDs:
These
LEDs
provide
alarm
notifications
for
the
BladeCenter
T
unit.
v
CRT
(Critical
alarm,
amber
(default)
or
red):
When
continuously
lit,
this
LED
indicates
the
presence
of
a
critical
system
fault.
The
system
comes
with
amber
as
the
default.
See
the
BladeCenter
T
Management
Module
User’s
Guide
for
information
on
setting
the
color
of
this
LED.
A
critical
system
fault
is
an
error
or
event
that
is
unrecoverable.
In
this
case,
the
system
cannot
continue
to
operate.
An
example
is
the
loss
of
a
large
section
of
memory
that
causes
the
system
to
be
incapable
of
operating.
v
MJR
(Major
alarm,
amber
(default)
or
red):
When
continuously
lit,
this
LED
indicates
the
presence
of
a
major
system
fault.
The
system
comes
with
amber
as
the
default.
See
the
BladeCenter
T
Management
Module
User’s
Guide
for
information
on
setting
the
color
of
this
LED.
A
major
system
fault
is
an
error
or
event
that
has
a
discernible
impact
to
system
operation.
In
this
case,
the
system
can
continue
to
operate
but
with
reduced
performance.
An
example
is
the
loss
of
one
of
two
mirrored
disks.
v
MNR
(Minor
alarm,
amber):
When
continuously
lit,
this
LED
indicates
the
presence
of
a
minor
system
fault.
A
minor
system
fault
is
an
error
or
event
that
has
little
impact
to
system
operation.
An
example
is
a
correctable
ECC
error.
USB
connectors:
There
are
two
USB
connectors
on
the
front
system-status
panel.
You
can
use
these
USB
connectors
to
connect
two
USB
peripheral
devices
without
an
external
hub.
If
more
devices
are
required,
you
can
connect
an
external
hub
to
any
of
the
built-in
connectors.
12
BladeCenter
T
Type
8720
and
8730:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide