A falling sensor is provided, which detects a falling of a magnetic disk drive or an information processing device installed with the magnetic disk drive and which is effective for avoiding physical damage of magnetic heads and magnetic disk media. In some arrangements, the temperature andor humidity within the housing will be monitored. The metal cap is generally in a locked position when the snap slot is aligned atop the snap lock tabs such that the protrusion snap ring is descended downward until the positioned flush against the snap lock groove. Objects may engage with the bracket such that these objects are supported by the roof standoff.