Comment by bitwize

A lot of older hard drives made a soft "fweep fweep fweep" as the heads were actuated by a stepper motor. The "tik-tik-tik" hard drives had servomotors. Occasionally I heard the stepper-motor "fweep fweep" sound to indicate "computer is working" in media, even when said computer was too new to have like an ST506 in it.