Definition of a “Physical Failure:”
A physical failure is when your hard drive has experienced mechanical or electrical damage.  Physical damage can be caused by power spikes or sags, weather pattern changes including lightning strikes and barometric pressure shifts, and/or the drive dying on its own. 

Our Electrical Engineers perform these physical repairs in our Class100 Clean Room to uphold data integrity and drive warranty. All hard drives are manufactured in a sterile cleanroom environment. During the process, the drives are hermetically sealed to prevent outside particles from entering the drive casing; this is why a cleanroom is necessary.

Do not let anyone open your drive without a cleanroom!