Method and system to monitor magnetic head loading and unloading stability for a data storage system

摘要

A method and system to monitor stability of magnetic head loading and unloading beside media for a data storage system is described. A shock sensor is utilized to detect shock during preloading of a magnetic head beside recording media, during loading of a magnetic head beside recording media, during pre-unloading of a magnetic head from the recording media, and/or during unloading of a magnetic head from the recording media. In an aspect, a desired pitch static attitude (PSA) and roll static attitude (RSA) of a slider is determined. In an aspect, the stability of a magnetic head is assessed and screened while on the fly and during head gimbal assembly (HGA) design and testing to improve overall data storage device reliability.

主权项

1. An apparatus for monitoring at least one of loading stability and unloading stability of a magnetic head beside recording media, for a data storage system, the apparatus comprising:
a magnetic head; a shock sensor to detect shock during at least one of i.) preloading of the magnetic head beside the recording media, ii.) loading of the magnetic head beside the recording media, iii.) pre-unloading of the magnetic head from the recording media, and iv.) unloading of the magnetic head from the recording media; and a controller to monitor a shock detection signal from the shock sensor, and to determine whether the shock detection signal exceeds a predetermined threshold for pitch static attitude (PSA) and roll static attitude (RSA) of a slider joined to the magnetic head.