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：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.