IBM x3800 User Guide - Page 24

Server, power, features

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Server power features When the server is connected to an ac power source but is not turned on, the operating system does not run, and all core logic except for the service processor 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 ac power but is not turned on. Turning on the server Approximately 20 seconds after the server is connected to ac 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 can also 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. v If your operating system supports the systems-management software for the Remote Supervisor Adapter II SlimLine, the systems-management software can turn on the server. v If your operating system supports the Wake on LAN feature, the Wake on LAN feature can turn on the server. Turning off the server When you turn off the server and leave it connected to ac 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 ac 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. 12 IBM System x3800 Type 8865: User's Guide

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Server
power
features
When
the
server
is
connected
to
an
ac
power
source
but
is
not
turned
on,
the
operating
system
does
not
run,
and
all
core
logic
except
for
the
service
processor
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
ac
power
but
is
not
turned
on.
Turning
on
the
server
Approximately
20
seconds
after
the
server
is
connected
to
ac
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
can
also
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.
v
If
your
operating
system
supports
the
systems-management
software
for
the
Remote
Supervisor
Adapter
II
SlimLine,
the
systems-management
software
can
turn
on
the
server.
v
If
your
operating
system
supports
the
Wake
on
LAN
feature,
the
Wake
on
LAN
feature
can
turn
on
the
server.
Turning
off
the
server
When
you
turn
off
the
server
and
leave
it
connected
to
ac
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
ac
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.
12
IBM
System
x3800
Type
8865:
User’s
Guide