the
ThinkPad
computer
is
used
on
a
plane
or
train
and
repetitive
vibration
is
expected.
Application
function
overview
The
APS
software
monitors
the
accelerometer
sensor
information
and
displays
the
sensor
status
in
the
system
task
tray.
The
following
four
states
of
system
status
are
illustrated
using
the
system
tray
icon:
v
Shock
sensor
is
disabled.
In
this
state,
shock
sensor
monitoring
is
not
enabled
and
hard
drive
active
protection
is
not
activated.
v
Shock
sensor
is
enabled,
but
no
shock
is
detected.
In
this
state,
shock
sensing
is
enabled
and
monitoring
the
shock
condition.
The
active
protection
system
does
not
detect
any
shock
condition
and
the
internal
primary
hard
disk
drive
is
operating
normally.
Figure
1.
IBM
Hard
Drive
Active
Protection
System
Properties
Figure
2.
IBM
Hard
Drive
Active
Protection
System
3
