公开(公告)号：US20220027056A1

公开(公告)日：2022-01-27

申请号：US16935527

申请日：2020-07-22

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Jose Mari Toribio ,  Teck Khoon Lim ,  Wenxiang Xie ,  Xiong Liu

IPC: G06F3/06 ,  G06F11/07

Abstract: 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.

公开(公告)号：US11380356B2

公开(公告)日：2022-07-05

申请号：US17218810

申请日：2021-03-31

Applicant: Seagate Technology LLC

Inventor： Phan Linh Nguyen ,  Chi Sern Georgie Tan ,  Qiang Bi ,  Joshua W. Christensen ,  Song Wee Teo ,  Wei Chen Lau ,  Heather Lee Mallett ,  Renee Depew ,  David Allan Thorsvik ,  Tze Pin Chin ,  Jose Mari Toribio

IPC: G11B5/09 ,  G11B5/596 ,  G11B20/12 ,  G11B20/10 ,  G11B33/12

Abstract: 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.

公开(公告)号：US11360671B2

公开(公告)日：2022-06-14

申请号：US16935527

申请日：2020-07-22

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Jose Mari Toribio ,  Teck Khoon Lim ,  Wenxiang Xie ,  Xiong Liu

IPC: G06F3/06 ,  G06F11/07

Abstract: 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.

公开(公告)号：US10997996B1

公开(公告)日：2021-05-04

申请号：US16916786

申请日：2020-06-30

Applicant: Seagate Technology LLC

Inventor： Phan Linh Nguyen ,  Chi Sern Georgie Tan ,  Qiang Bi ,  Joshua W. Christensen ,  Song Wee Teo ,  Wei Chen Lau ,  Heather Lee Mallett ,  Renee Depew ,  David Allan Thorsvik ,  Tze Pin Chin ,  Jose Mari Toribio

IPC: G11B5/09 ,  G11B5/596 ,  G11B20/12 ,  G11B20/10 ,  G11B33/12

Abstract: 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.

公开(公告)号：US09280987B1

公开(公告)日：2016-03-08

申请号：US14744908

申请日：2015-06-19

Applicant: Seagate Technology LLC

Inventor： Haoji Bao ,  Myint Ngwe Maung ,  Cheun Pin Tan ,  Jose Mari Toribio

IPC: G11B5/09 ,  G11B27/36 ,  G11B5/596 ,  G11B5/012

CPC classification number: G11B5/09 ,  G11B5/012 ,  G11B5/5534 ,  G11B5/596 ,  G11B20/1217 ,  G11B27/36 ,  G11B2020/1238

Abstract: 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.

Abstract translation: 用于选择具有可变比特宽高比的磁记录介质的数据密度值（例如，每英寸的位数）和轨道密度值（例如，每英寸的轨道）的示例性方法包括获得多个数据密度值和多个轨道密度值 作为相应的多个误码率的函数; 确定所述多个数据密度值与所述多个磁道密度值之间的数据密度/磁道密度相关性至少一个扇区误差率; 以及使用所述数据密度/轨道密度相关性来确定提供满足一个或多个预定标准（例如，基本上最大面积密度能力值）的面密度能力值的数据密度能力值和轨道密度能力值。 使用数据密度/轨道密度相关性和确定的数据密度能力值，可选地针对给定的目标区域密度能力来确定选择的数据密度值和所选轨道密度值。