Power-Down Procedure; Sleep States (Acpi) - HP NetServer LH 6000 Installation Manual

Chapter 2

Power-Down Procedure

Follow this procedure when installing non-hot-swap and non-hot-plug
components, such as tape drives and non-hot-plug PCI boards.
1. Log off all users and back-up files.
2. Follow instructions in your network operating system (NOS)
documentation to gracefully shut down all networking software and
applications.
3. Press the Power switch to shut down the NetServer (see Figure 2-3).
Normally, this completes the procedure.

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, 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.
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