Powering-Down the Server, Sleep States Acpi

Chapter 1

Controls and Indicators

Powering-Down the Server

1.Make sure that you have exited all applications.

2.Use the shut down command in your operating system’s Start menu (for Windows NT 4.0 and Windows 2000, and Windows XP operating systems).

3.When prompted, press the power button on the HP Server.

WARNING The power supply will continue to provide standby current to the Server until the power cord is disconnected from the rear panel.

If you want to force the HP Server to shut down (for example after the operating system has crashed), press and hold down the power button for approximately 5 seconds.

Connecting Power to Multiple-Server Configurations

The HP Server temporarily draws a large “inrush current,” when first connected to an AC power source. This also occurs when the Server 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 Server’s normal operating current and generally, the AC power source can handle the normal inrush current.

However, if you install several HP Servers 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. Refer to Chapter 9.

Sleep States (ACPI)

The HP Server 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 Server. The term “sleep state” refers to any of several reduced power consumption states in which normal NOS activity has ceased.

The Server supports several sleep states. One of these is a “standby” or “suspend” sleep state, which has a short wake-up time. In this sleep state the Server appears to be off – the monitor appears blank and there is no CD-ROM, internal hard drive activity (IDE or SCSI), however, the power LED is a blinking green and the system fan continues to operate.

The Server also may support another sleep state with a slower wake-up time, sometimes referred to as “hibernate” by various operating systems. In this sleep state, the Server appears to be off as described earlier, but the system fan and the front panel power LED are also turned off. The unique feature of this sleep state (and the reason for its slower wake-up time) is that information about the Server’s NOS state (open applications, screens, and so on) is saved to disk before the Server is placed in the sleep state. Upon wake-up, this information is restored from disk. This method of restoring the Server’s operation is much faster than a complete rebooting of the Server. It 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 Server supports certain types of system activity, which are used as wake-up events from these sleep states. These wake-up events can be generated from the power button, keyboard or mouse activity, and scheduled events.

NOTE	The HP Server’s power management policies (transitions between various power states)
	and the user options are specific to the particular ACPI-compliant NOS installed on the
	Server. If your NOS is ACPI-compliant, refer to the (BIOS) Setup Utility and the power
	management features provided in the NOS instructions for more information.

The HP Server’s power button can be configured to initiate a graceful shutdown or “soft off” of the NOS rather than an immediate shutdown of the power supply. The power button configurations are dependent on

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