IBM x3500 Installation Guide - Page 53

Server, power, features, Turning, server

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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 microprocessor is shut down; however, the server can respond to requests from the service microprocessor (also called the baseboard management controller), 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, one or more fans might start running, and 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 the server is connected to an Advanced System Management interconnect network that contains at least one server with an optional Remote Supervisor Adapter II SlimLine installed, the server can be turned on from the Remote Supervisor Adapter user interface. v If your operating system supports the systems-management software for an optional 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. Note: When 4 GB or more of memory (physical or logical) is installed, some memory is reserved for various system resources and is unavailable to the operating system. The amount of memory that is reserved for system resources depends on the operating system, the configuration of the server, and the configured PCI devices. Chapter 3. Server controls, connectors, LEDs, and power 39

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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
microprocessor
is
shut
down;
however,
the
server
can
respond
to
requests
from
the
service
microprocessor
(also
called
the
baseboard
management
controller),
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,
one
or
more
fans
might
start
running,
and
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
the
server
is
connected
to
an
Advanced
System
Management
interconnect
network
that
contains
at
least
one
server
with
an
optional
Remote
Supervisor
Adapter
II
SlimLine
installed,
the
server
can
be
turned
on
from
the
Remote
Supervisor
Adapter
user
interface.
v
If
your
operating
system
supports
the
systems-management
software
for
an
optional
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.
Note:
When
4
GB
or
more
of
memory
(physical
or
logical)
is
installed,
some
memory
is
reserved
for
various
system
resources
and
is
unavailable
to
the
operating
system.
The
amount
of
memory
that
is
reserved
for
system
resources
depends
on
the
operating
system,
the
configuration
of
the
server,
and
the
configured
PCI
devices.
Chapter
3.
Server
controls,
connectors,
LEDs,
and
power
39