When the sensor senses a change in gravitational or inertial acceleration of said data processing system, it alerts {HEAD ~ system electronics} to temporarily park {TAIL ~ a read/write head} in a safe position 
to temporarily park
When the sensor senses a change in gravitational or inertial acceleration of said data processing system , it alerts { HEAD ~ system electronics } to temporarily park { TAIL ~ a read / write head } in a safe position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH