HP D6030A - NetServer - E50 Installation Manual page 18

Chapter 2
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.
NOTE The HP NetServer power button will force a power down
without waiting for the NOS to gracefully shut down the
NetServer if the power button is pressed and held in excess of
four seconds.
CAUTION
If the power button override is used, there is a strong
possibility of corrupted or lost data.
12
Controls, Ports, and Indicators