Server power features, Turning on the server, Turning off the server – Lenovo RD120 User Manual
Page 26: Server, Power, Features, Turning
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.
Turning
on
the
server
Approximately
5
seconds
after
the
server
is
connected
to
power,
the
power-control
button
becomes
active,
and
one
or
more
fans
might
start
running
to
provide
cooling
while
the
server
is
connected
to
power.
You
can
turn
on
the
server
and
start
the
operating
system
by
pressing
the
power-control
button.
The
server
also
can
be
turned
on
in
any
of
the
following
ways:
v
If
a
power
failure
occurs
while
the
server
is
turned
on,
the
server
will
restart
automatically
when
power
is
restored.
Turning
off
the
server
When
you
turn
off
the
server
and
leave
it
connected
to
power,
the
server
can
respond
to
requests
from
the
service
processor,
such
as
a
remote
request
to
turn
on
the
server.
While
the
server
remains
connected
to
power,
one
or
more
fans
might
continue
to
run.
To
remove
all
power
from
the
server,
you
must
disconnect
it
from
the
power
source.
Some
operating
systems
require
an
orderly
shutdown
before
you
turn
off
the
server.
See
your
operating-system
documentation
for
information
about
shutting
down
the
operating
system.
Statement
5:
CAUTION:
The
power
control
button
on
the
device
and
the
power
switch
on
the
power
supply
do
not
turn
off
the
electrical
current
supplied
to
the
device.
The
device
also
might
have
more
than
one
power
cord.
To
remove
all
electrical
current
from
the
device,
ensure
that
all
power
cords
are
disconnected
from
the
power
source.
1
2
12
ThinkServer
RD120
Types
6444,
6445,
6446,
and
6447:
User
Guide