One embodiment of the present invention is a head stack assembly of a disk drive, which head stack assembly includes: (a) a first contact disposed on a side of the head stack assembly, which first contact is adapted to contact a crash stop of the disk drive to stop the head stack assembly from moving in a first direction; and (b) a second contact disposed on the same side of the head stack assembly, which second contact is adapted to contact the crash stop to prevent the head stack assembly from moving in a second direction different from the first direction.