公开(公告)号：US20230178110A1

公开(公告)日：2023-06-08

申请号：US17540566

申请日：2021-12-02

Applicant: Seagate Technology LLC

Inventor： Steven Douglas Granz ,  Ian James Gilbert

IPC: G11B21/08

CPC classification number: G11B21/08

Abstract: A data storage medium includes a substrate, and a plurality of spaced-apart discrete data storage tracks supported by the substrate. The data storage medium also includes magnetic flux sinking material between the discrete data storage tracks and over the substrate. As an alternative to the magnetic flux sinking material, plasmonic material may be included between the discrete data storage tracks and over the substrate.

公开(公告)号：US11158338B1

公开(公告)日：2021-10-26

申请号：US17024224

申请日：2020-09-17

Applicant: Seagate Technology LLC

Inventor： Mehmet Fatih Erden ,  Steven Douglas Granz

IPC: G11B5/09 ,  G11B5/596 ,  G11B19/04 ,  G11B5/60 ,  G11B5/48 ,  G11B5/00

Abstract: A data storage device includes a data storage medium having a data storage surface. The data storage device also includes a first actuator having a first attached slider with a writer configured to write data on the data storage surface. The writer has a media-confronting surface covered by a first non-magnetic overcoat having a first thickness. The data storage device further includes a second actuator having a second attached slider with at least one user-data reader configured to read user data from the data storage surface and no writer for writing data on the data storage surface. The at least one user-data reader has a media-confronting surface covered by a second non-magnetic overcoat having a second thickness that is less than the first thickness of the first non-magnetic overcoat.

公开(公告)号：US10522184B1

公开(公告)日：2019-12-31

申请号：US16506222

申请日：2019-07-09

Applicant: Seagate Technology LLC

Inventor： Steven Douglas Granz ,  Mehmet Faith Erden

IPC: G11B5/00 ,  G11B5/09 ,  G11B20/12

Abstract: Bottom tracks are written to a recording medium using a first setting of a spin-torque oscillator of a single microwave assisted magnetic recording (MAMR) head. Top tracks are written interlaced between and partially overlapping the bottom tracks using the single MAMR head at a second setting of the MAMR head, the first and second settings resulting in different bit aspect ratios for the top and bottom tracks.

公开(公告)号：US10510373B1

公开(公告)日：2019-12-17

申请号：US15939502

申请日：2018-03-29

Applicant: Seagate Technology LLC

Inventor： Steven Douglas Granz ,  Mehmet Fatih Erden

IPC: G11B5/48 ,  G11B20/12

Abstract: First tracks are read via a first head that is moved via a first actuator over a first, radially-defined, zone of a disk surface. Second tracks are read via a second head that is moved via a second actuator over a second zone of the disk surface that is separate from the first zone. The first and second heads are optimized to read data within first and second skew angle ranges associated with the first and second zones. The first and second skew angle ranges are each less than a total skew angle range of the disk surface.

公开(公告)号：US10366726B1

公开(公告)日：2019-07-30

申请号：US15939493

申请日：2018-03-29

Applicant: Seagate Technology LLC

Inventor： Steven Douglas Granz ,  Mehmet Fatih Erden

IPC: G11B5/55 ,  G11B33/14 ,  G11B25/04 ,  G11B5/00 ,  G11B5/54

Abstract: A first set of bottom tracks is written via a first head that is moved via a first actuator over a surface of a disk. A second set of top tracks interlaced between and partially overlapping the bottom tracks via a second head that is moved via a second actuator over the surface of the disk independently of the first actuator and first head.

公开(公告)号：US09666213B1

公开(公告)日：2017-05-30

申请号：US15196578

申请日：2016-06-29

Applicant: Seagate Technology LLC

Inventor： Mehmet Fatih Erden ,  Steven Douglas Granz

IPC: G11B5/09 ,  G11B20/12

CPC classification number: G11B5/09 ,  G11B20/10527 ,  G11B20/1217 ,  G11B2020/1238 ,  G11B2020/1292

Abstract: In response to a command to update a target track, two tracks or more are concurrently read. The two tracks or more tracks include a top track that partially overlaps the target track. Data of the top track is stored in a memory, and the update data is written over at least part of the target track. The stored data is written on the recording medium over the top track or at a different location.