IBM ThinkPad X20 Hardware Maintenance Manual page 32

Note for Windows NT
A Windows NT user cannot create a hibernation file
in a Windows NT system that uses NTFS format,
the Windows NT default format. If you want to use
hibernation mode, you will need to reinstall Windows
NT with FAT format.
In hibernation mode, the following occurs:
v The system status, RAM, VRAM, and setup data are
stored on the hard disk.
v The system is powered off.
Notes:
1. In the ThinkPad Configuration program, the
computer can be set to suspend/hibernate
while docked.
2. The computer cannot enter hibernation mode
when it is powered with AC power and a
communication PC Card is used.
3. If the computer enters the hibernation mode
when it is docked to the docking station, do not
undock it from the docking station before
resuming normal operation. If you do undock it,
then if you try to resume normal operation, you
will get an error message, and you will have to
restart the system.
Any one of the following events causes the computer to
enter hibernation mode:
v The Fn + F12 keys are pressed.
v The power switch is turned off and the mode is set to
Power switch mode Hibernation.
v The timer conditions are satisfied in suspend mode (for
operating systems other than Windows 98).
v A critically low battery condition occurs and the mode is
set to Hibernate when battery becomes low.
When the power is turned on, the computer leaves
hibernation mode and resumes operation. The hibernation
file in the boot record on the hard disk drive is read, and
system status is restored from the hard disk drive.
28
ThinkPad X20, X21, X22