Sleep States (Acpi) - HP NetServer LC 2000r Installation Manual

Chapter 2

Sleep States (ACPI)

The HP NetServer supports the ACPI (Advanced Configuration and Power
Interface) standard, which is a key component of a NOS's directed power
management. The supported features are only available when an ACPI-compliant
NOS is installed on the NetServer. The term "sleep state" refers to any of several
reduced power consumption states in which normal NOS activity has ceased.
The NetServer supports several sleep states, including a sleep state with a short
wake-up time, sometimes referred to as "standby" or "suspend" by various
operating systems. In this sleep state the NetServer appears to be off, and is
indicated by no display on the monitor and no activity for the CD-ROM or
internal hard drives. However, the power LED is slowly flashing and the fans are
operating.
An additional sleep state supported by the NetServer is one with a slower wake-up
time, sometimes referred to as "hibernate" by various operating systems. In this
sleep state, the NetServer appears to be off as mentioned earlier, but the fans and
the power LED are also turned off. This sleep state's unique feature (and the
reason for its slower wake-up time) is that the NetServer's state (applications
running, screens open, etc.) just prior to hibernate has been saved to disk and must
be restored from disk upon wake-up. This method of restoring the NetServer's
operation is much faster than rebooting the NetServer, which would require
running all the start-up self-tests before starting the NOS.
The NetServer supports certain types of system activity, which is used as wake-up
events from these sleep states. These wake-up events can be generated from the
power button, LAN activity, and scheduled events. The embedded Integrated
Remote Assistant also has the capability of waking up the NetServer.
NOTE
The HP NetServer's power management policies (transitions
between various power states) and the user options are specific
to the particular ACPI-compliant NOS installed on the
NetServer. If your respective NOS is ACPI-compliant, refer to
the power management features in the instructions provided for
more information.
The HP NetServer's power button can be configured to initiate a sleep state (Sleep
button) or a "soft off" or graceful shutdown of the NOS, rather than an immediate
shutdown of the power supply. The power button configurations are dependent on
the user interface provided by the ACPI-compliant NOS. While power
management is under the control of the ACPI-compliant NOS, the HP NetServer's
power button is capable of an override in case of a non-responsive NOS.
Controls, Ports and Indicators
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