Flying height control device for magnetic head, and magnetic disk device

Abstract

A flying height control device controls a flying height of a magnetic head and reports the state of the flying height control of a magnetic disk device to a host, using self monitoring, analysis and reporting functions. A function to control a flying height by controlling the heat power of a heater element of a magnetic head is added to functions of the self monitoring, analysis and reporting. And self recovery of the read performance is performed by correcting the heater power, and the heater power correction state using this function is reported to the host. Before data is lost, processing to avoid data loss can be started, and this function can be implemented simply by adding the heater power correction function since data of the self monitoring, analysis and reporting functions is utilized, thereby enabling easy installation.

Dependencies are inferred from the claim text.