Western Digital Technologies, Inc.

Steven L Webb

Raffi Codilian

Chun Sei Tsai

Carl E Barlow

Kent William Gibbons

Thao Hieu Banh

Anthony L Pei

A data storage device is disclosed comprising a head actuated over a disk, wherein the head comprises a fly height actuator (FHA) configured to adjust a fly height of the head over the disk. A temperature of the data storage device is measured, and the FHA is controlled as a function of the measured temperature. A first quality metric of the data storage device is measured, and when the first quality metric falls below a threshold, the FHA control as a function of the measured temperature is disabled and the FHA is controlled to decrease the fly height of the head.

Data storage device controlling head fly height based on temperature

An apparatus includes: a media; a head configured to write data on the media; a read channel, coupled to the head, configured to detect servo data from the media; and control circuitry, coupled to the read channel, configured to: generate a position error signal (PES), associated with a write operation of an aggressor track, from the servo data, compare a first threshold to the PES for detecting a write unsafe condition, compare a second threshold, within the first threshold, to the PES for detecting a write squeeze condition, and control a refresh operation of a victim track based on at least one of the comparisons.

Electronic system with data refresh mechanism and method of operation thereof

A method of expanding the on-track operational range of a disk drive based upon detection of an external vibration condition. The method involves detecting that a vibration state exists and, while the existence of the vibration state is detected, modifying the default on-track-declaration algorithm such that a data transfer operation can be completed in less time than if the default on-track-declaration algorithm was in use.

Method of modifying on-track declaration algorithm of a disk drive based upon detection of external vibration condition

A rotating media storage device (RMSD) includes a cache memory and a microprocessor for executing a read caching algorithm for storing data in the cache memory. The microprocessor modifies the read caching algorithm when a vibration state is detected to optimize data transfer rates to and from the media in a vibrating operational environment.

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Trabuco Canyon, CA, United States of America

Steven L Webb