公开(公告)号：US10056108B1

公开(公告)日：2018-08-21

申请号：US15641547

申请日：2017-07-05

Applicant: Seagate Technology LLC

Inventor： Edmun Chian Song Seng ,  Det Hau Wu ,  Lin Nah Lim ,  Jose Mari Corral Toribio ,  Luh Chyuan Lau ,  Utt Heng Kan ,  Meng Suan June Lee

IPC: G11B5/09 ,  G11B20/10 ,  G11B5/00

CPC classification number: G11B20/10222 ,  G11B5/012 ,  G11B5/09 ,  G11B2005/0021

Abstract: A method involves determining bit aspect ratios for interlaced tracks written to a magnetic recording medium. The interlaced tracks include top tracks that are written partially overlapping and interlaced with bottom tracks. Isolated test tracks are written at first different bit aspect ratios to determine a top bit aspect ratio that achieves a first target areal density for the isolated test tracks. Interlaced test tracks are written at second different bit aspect ratios to determine a bottom bit aspect ratio that achieves a second target areal density for the interlaced test tracks. Top test tracks of the interlaced test tracks are written at the top bit aspect ratio. The top and bottom bit aspect ratios are selected to subsequently write interlaced tracks on the magnetic recording medium.

公开(公告)号：US10339969B2

公开(公告)日：2019-07-02

申请号：US16048886

申请日：2018-07-30

Applicant: Seagate Technology LLC

Inventor： Edmun Chian Song Seng ,  Det Hau Wu ,  Lin Nah Lim ,  Jose Mari Corral Toribio ,  Luh Chyuan Lau ,  Utt Heng Kan ,  Meng Suan June Lee

IPC: G11B5/09 ,  G11B20/10 ,  G11B5/00

Abstract: A method involves determining bit aspect ratios for interlaced tracks written to a magnetic recording medium. The interlaced tracks include top tracks that are written partially overlapping with bottom tracks. Isolated test tracks are written at first different bit aspect ratios to determine a top bit aspect ratio that achieves a first target areal density for the isolated test tracks. Test tracks are written at second different bit aspect ratios to determine a bottom bit aspect ratio that achieves a second target areal density for the test tracks. Top test tracks of the test tracks are written at the top bit aspect ratio. The top and bottom bit aspect ratios are selected to subsequently write partially-overlapping tracks on the magnetic recording medium.

公开(公告)号：US08941937B1

公开(公告)日：2015-01-27

申请号：US14336390

申请日：2014-07-21

Applicant: Seagate Technology LLC

Inventor： Jose Mari Corral Toribio ,  Lim Teck Khoon ,  Lau Luh Chyuan ,  Clifford Jayson Bringas Camalig

IPC: G11B27/36

CPC classification number: G11B20/10361 ,  G11B5/012 ,  G11B20/10305

Abstract: Technologies are described herein for determining the linear storage density of data tracks on a recording media of a storage device while compensating for segments of the recording media with poor bit-error rates. The sectors of the data track are grouped into a plurality of segments and a bits-per-inch capability (“BPIC”) value is determined for each of the plurality of segments based on a target bit-error rate. The lowest segment BPIC value from amongst the plurality of segments is then determined as well as an average BPIC value for the entire data track. The final BPI value for the data track is determined based on the average BPIC value and the lowest segment BPIC value.

Abstract translation: 这里描述了用于确定存储设备的记录介质上的数据轨道的线性存储密度的技术，同时以差的误码率补偿记录介质的段。 数据磁道的扇区被分组成多个段，并且基于目标误码率为多个段中的每一个确定每英寸能力（“BPIC”）的值。 然后确定来自多个段中的最低段BPIC值以及整个数据轨道的平均BPIC值。 基于平均BPIC值和最低段BPIC值确定数据轨道的最终BPI值。

公开(公告)号：US20190013045A1

公开(公告)日：2019-01-10

申请号：US16048886

申请日：2018-07-30

Applicant: Seagate Technology LLC

Inventor： Edmun Chian Song Seng ,  Det Hau Wu ,  Lin Nah Lim ,  Jose Mari Corral Toribio ,  Luh Chyuan Lau ,  Utt Heng Kan ,  Meng Suan June Lee

IPC: G11B20/10 ,  G11B5/09 ,  G11B5/00

CPC classification number: G11B20/10222 ,  G11B5/012 ,  G11B5/09 ,  G11B2005/0021

Abstract: A method involves determining bit aspect ratios for interlaced tracks written to a magnetic recording medium. The interlaced tracks include top tracks that are written partially overlapping with bottom tracks. Isolated test tracks are written at first different bit aspect ratios to determine a top bit aspect ratio that achieves a first target areal density for the isolated test tracks. Test tracks are written at second different bit aspect ratios to determine a bottom bit aspect ratio that achieves a second target areal density for the test tracks. Top test tracks of the test tracks are written at the top bit aspect ratio. The top and bottom bit aspect ratios are selected to subsequently write partially-overlapping tracks on the magnetic recording medium.

公开(公告)号：US09607633B1

公开(公告)日：2017-03-28

申请号：US15091945

申请日：2016-04-06

Applicant: Seagate Technology LLC

Inventor： Jose Mari Corral Toribio ,  Song Wee Teo ,  Teck Khoon Lim

IPC: G11B5/09 ,  G11B20/12 ,  G11B20/18

CPC classification number: G11B20/182 ,  G11B5/012 ,  G11B20/1217 ,  G11B2020/1238 ,  G11B2020/1242 ,  G11B2020/1292

Abstract: Method and apparatus for positioning shingled magnetic recording (SMR) tracks on a rotatable data storage medium. In some embodiments, a first band of partially overlapping tracks is written the medium at a first track pitch. An adjacent, second band of partially overlapping tracks is written to the medium at the first track pitch. The second band has a first written track at a second track pitch with respect to a last written track in the first band. The second track pitch is determined in response to an error rate established for a test track using an adjacent track written at the first track pitch.