Data storage device detecting fly height instability of head during load operation based on microactuator response

摘要

A data storage device is disclosed comprising a first disk surface, a first head, and a first microactuator configured to actuate the first head over the first disk surface. The first microactuator is configured into a first sensor, and a first load operation is executed to load the first head over the first disk surface. A fly height instability of the first head is detected during the first load operation based on a first sensor signal generated by the first microactuator.

主权项

1. A data storage device comprising:
a first disk surface; a first head; a first microactuator configured to actuate the first head over the first disk surface; a second disk surface; a second head; a second microactuator configured to actuate the second head over the second disk surface; and control circuitry configured to:
configure the first microactuator into a first sensor;configure the second microactuator into a second sensor;execute a first load operation to load the first head over the first disk surface and to load the second head over the second disk surface;detect a fly height instability of at least one of the first head and the second head during the first load operation based on a first sensor signal generated by the first microactuator and based on a second sensor signal generated by the second microactuator;wire-OR the first sensor signal and the second sensor signal to generate a combined sensor signal; anddetect the fly height instability of at least one of the first head and the second head based on the combined sensor signal.