Seagate Technology Incorporated

Jose Mari Toribio

Qiang Bi

Joshua Ward Christensen

Song Wee Teo

Tze Pin Chin

Phan Linh Nguyen

Wei Chen Lau

Heather Lee Mallett

Renee Depew

Chi Sern Georgie Tan

David Allan Thorsvik

Xiong Liu

Wenxiang Xie

Jian Qiang

Teck Khoon Lim

Cheun Pin Tan

Haoji Bao

Myint Ngwe Maung

The technology disclosed herein provides a method for generating an on-cylinder limit (OCLIM), the method including performing servo certification of a plurality of drives in a storage device to generate servo adaptive parameters (SAPs) by heads, generating a plurality of read adjust parameters (RAPs) by heads for the plurality of drives, generating an interim OCLIM value based on the SAPs by heads and RAPs by zones, and operating a disc drive write element using the interim OCLIM value.

Flexible on-cylinder limit for drive performance management

An adjacent track interference (ATI) metric is determined for each of a plurality of regions of a single surface of a magnetic disk. Based on the ATI metrics, each of the regions is assigned a region-specific directed offline scan (DOS) criterion, at least two of the DOS criteria being different from one another. Based on a write count of a track within one of the regions satisfying the associated region-specific DOS criterion, a DOS remediation of the track is performed.

Region-specific directed offline scan for hard disk drive

An exemplary method for selecting data density values (e.g., bits per inch) and track density values (e.g., tracks per inch) for magnetic recording media having variable bit aspect ratios comprises obtaining a plurality of data density values and a plurality of track density values as a function of a corresponding plurality of bit error rates; determining a data density/track density correlation between the plurality of data density values and the plurality of track density values for at least one Sector Error Rate; and determining a data density capability value and a track density capability value that provides an areal density capability value that satisfies one or more predefined criteria (e.g., a substantially maximum areal density capability value) using the data density/track density correlation. A selected data density value and a selected track density value are optionally determined for a given target areal density capability using the data density/track density correlation and the determined data density capability value.

Methods and apparatus for selecting data density and track density values for magnetic recording media having variable bit aspect ratios

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Singapore, Singapore

Jose Mari Toribio