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AssigneeWestern Digital Technologies, Inc.
InventorsDean V. Dang, Philip Bernard Saram, Chakrit Choosang, Jonas A. Goode
Estimating the term…
A disk drive is disclosed comprising a disk having top and bottom surfaces, and top and bottom heads actuated over the top and bottom surfaces, respectively. Control circuitry detects a warping of the disk by writing a first test pattern to the top surface, reading the first test pattern to generate a first read signal, monitoring a first read signal value proportional to an amplitude of the first read signal, writing a second test pattern to the bottom surface, reading the second test pattern to generate a second read signal, monitoring a second read signal value proportional to an amplitude of the second read signal, and processing the first and second read signal values to detect a negative correlation between the amplitudes of the first and second read signals.
A disk drive comprising:
A method of detecting disk warping in a disk drive, the disk drive comprising a disk having a top surface and a bottom surface, a top head actuated over the top surface and a bottom head actuated over the bottom surface, the method comprising the steps
Dependencies are inferred from the claim text.