Server power features, Server, Power – Lenovo 6446 User Manual
Page 52: Features
supplying
adequate
DC
power
to
the
system.
During
typical
operation,
both
the
ac
and
dc
power
LEDs
are
lit.
For
any
other
combination
of
LEDs,
see
the
Hardware
Maintenance
Manual
on
the
ThinkServer
Documentation
DVD.
Systems-management
Ethernet
connector:
Use
this
connector
to
connect
the
server
to
a
network
for
systems-management
information
control.
This
connector
is
active
only
if
you
have
installed
a
Remote
Supervisor
Adapter
II
SlimLine,
and
it
is
used
only
by
the
Remote
Supervisor
Adapter
II
SlimLine.
Ethernet
activity
LEDs:
When
these
LEDs
are
lit,
they
indicate
that
the
server
is
transmitting
to
or
receiving
signals
from
the
Ethernet
LAN
that
is
connected
to
the
Ethernet
port.
Ethernet
link
LEDs:
When
these
LEDs
are
lit,
they
indicate
that
there
is
an
active
link
connection
on
the
10BASE-T,
100BASE-TX,
or
1000BASE-TX
interface
for
the
Ethernet
port.
Ethernet
connectors:
Use
either
of
these
connectors
to
connect
the
server
to
a
network.
USB
connectors:
Connect
a
USB
device,
such
as
USB
mouse,
keyboard,
or
other
USB
device,
to
any
of
these
connectors.
Video
connector:
Connect
a
monitor
to
this
connector.
The
video
connectors
on
the
front
and
rear
of
the
server
can
be
used
simultaneously.
System-error
LED:
When
this
LED
is
lit,
it
indicates
that
a
system
error
has
occurred.
An
LED
on
the
light
path
diagnostics
panel
is
also
lit
to
help
isolate
the
error.
System-locator
LED:
Use
this
LED
to
visually
locate
the
server
among
other
servers.
Power-on
LED:
When
this
LED
is
lit
and
not
flashing,
it
indicates
that
the
server
is
turned
on.
When
this
LED
is
flashing,
it
indicates
that
the
server
is
turned
off
and
still
connected
to
a
power
source.
When
this
LED
is
off,
it
indicates
that
power
is
not
present,
or
the
power
supply
or
the
LED
itself
has
failed.
Serial
connector:
Connect
a
9-pin
serial
device
to
this
connector.
The
serial
port
is
shared
with
the
baseboard
management
controller
(BMC).
The
BMC
can
take
control
of
the
shared
serial
port
to
perform
text
console
redirection
and
to
redirect
serial
traffic,
using
Serial
over
LAN
(SOL).
SAS
connector:
Connect
a
serial-attached
SCSI
(SAS)
device
to
this
connector.
Server
power
features
When
the
server
is
connected
to
a
power
source
but
is
not
turned
on,
the
operating
system
does
not
run,
and
all
core
logic
except
for
the
service
processor
(the
baseboard
management
controller
or
optional
Remote
Supervisor
Adapter
II
SlimLine)
is
shut
down;
however,
the
server
can
respond
to
requests
from
the
service
processor,
such
as
a
remote
request
to
turn
on
the
server.
The
power-on
LED
flashes
to
indicate
that
the
server
is
connected
to
power
but
is
not
turned
on.
38
ThinkServer
RD120
Types
6444,
6445,
6446,
and
6447:
Installation
Guide