Compaq Armada 7400 Reference Manual page 62

To enable Hibernation, select Start Æ Settings Æ Control Panel
Æ Power Management Æ Hibernation tab Æ on.
If you upgrade memory, the computer increases the
Hibernation file size to accommodate the additional RAM. When
the Hibernation file increases, it requires more hard disk space.
Select one of the following methods:
If Hibernation was user-initiated or a low battery condition has
been resolved, slide the power switch to turn on the computer.
If the computer is in a critical low battery condition, insert a
fully charged battery pack or connect an external power
source.
The computer exits Hibernation. The information saved to the
hard disk returns to the screen at the point where Hibernation was
initiated.
To stop the restoration of information, press
A timeout is a specified period of inactivity for the computer or its
components. After this time period passes, power management
shuts down the computer or its components to save battery power.
For example, the hard drive component and default timeout is two
minutes. Therefore, if a software application does not access
information on the hard disk for two minutes, the hard drive spins
down until it is accessed again.
Timeouts work with power management to conserve battery
power. Battery power can be conserved by
Using timeouts that correspond with the preset medium
(default) or high level of power conservation.
Using the custom level of power conservation to set your own
timeouts so that they work more efficiently with your
applications.