HP LC2000r - NetServer - 128 MB RAM Installation Manual page 36

Chapter 2
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
shut down 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 non-responsive NOS.
NOTE The HP NetServer power button will force a power down
without waiting for the NOS to gracefully shut down, if the
power button is pressed and held for more than four seconds.
CAUTION If the power button override is used, there is a strong
possibility of corrupted or lost data.
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Controls, Ports, and Indicators