Implementing calibration of cooling sensitivity of embedded contact sensor (ECS) signal using thermal fly-height control (TFC) actuations

摘要

A method, apparatus, and system for implementing calibration of cooling sensitivity of embedded contact sensor (ECS) using thermal fly-height control (TFC) actuations, by subtracting the linear part (TFC heat) from the total measured ECS signal, a profile is provided that is sensitive only to the clearance of the head-disk interface due to cooling effect for hard disk drives.

主权项

1. A method for implementing calibration of cooling sensitivity of embedded contact sensor (ECS) signal using thermal fly-height control (TFC) actuations for hard disk drives comprising:
providing a thermal fly-height control (TFC) compensating for dynamic fly-height change around a disk revolution; measuring an ECS signal during operation of a hard disk drive; subtracting a linear TFC heat from a total measured ECS signal for providing a profile sensitive to a clearance of the head-disk interface due to cooling effect; and using said profile for calibrating the ECS signal measuring clearance variation of the head-disk interface and applied to the thermal fly-height control (TFC).