Chapter 1
General Information
5
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If you will be doing any kind of hardware or software upgrade, ensure the Netserver's data
has been backed up.
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Follow instructions in your network operating system (NOS) documentation to shut down all
networking software and applications.
WARNING
The power supply will continue to provide standby current to the Netserver until the
power cable is disconnected from the rear panel.
2. Press the power switch on the HP Netserver's control panel when prompted by the operating
system.
Normally this completes the power-down procedure.
Connecting AC Power to Multiple-Server Configurations
The HP Netserver temporarily draws a large "inrush current," when first connected to an AC power source.
This also occurs when the Netserver is in a standby mode (power is turned off, but the power cord is plugged
into AC power). The inrush current is much greater than the Netserver's normal operating current and
generally, the AC power source can handle the normal inrush current.
However, if you install several HP Netservers on one circuit, precautions are necessary. If there is a power
failure and power is then restored, all the servers immediately begin to draw inrush current at the same time.
If the circuit breakers on the incoming power line have insufficient capability, the breaker may trip and thus
prevent the servers from powering up.
When preparing your site for installation, allow for the additional inrush current.
Sleep States (ACPI)
The HP Netserver supports the ACPI (Advanced Configuration and Power Management 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. The unique feature of this sleep state
(and the reason for its slower wake-up time) is that the Netserver's NOS state (applications running, screens
open, etc.) just prior to hibernate has been saved to disk and must be restored from disk upon wake-up.
However, this method of restoring the Netserver's operation is much faster than a complete rebooting of the
Netserver. This method still requires running all the start-up self-tests before starting the NOS, but loading
the NOS and all the previously opened applications is much faster.
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.
