Seagate Sata 7200.4 more info can be found HERE
Works perfect, only selling as I have upgraded to a 500gb
The G-Force Protection feature provides enhanced data
protection against shock that may occur while the drive
is operating. This feature is designed to decrease the
likelihood of data loss by detecting a freefall event and
unloading the actuator before a shock takes place in falls
of greater than 8 inches (nominal).