公开(公告)号：US10777224B2

公开(公告)日：2020-09-15

申请号：US16556501

申请日：2019-08-30

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Timothy Francis Ellis ,  Gary Ernest Hillukka ,  Joshua Ward Christensen ,  Puskal Prasad Pokharel

IPC: G11B5/596 ,  G11B20/12

Abstract: Systems and methods for servo zone transition optimization are described. In one embodiment, the storage system device includes a disk drive and a controller. In some embodiments, the controller may be configured to assess at least one operation of a read/write head of the disk drive; and format, based at least in part on the assessing of the read/write head, a disk surface of the disk drive with a first servo zone, a second servo zone, and an overlap region extending between a start point of the second servo zone and an end point of the first servo zone. In some cases, the overlap region starts towards a disk inner diameter (ID) and ends towards a disk outer diameter (OD).

公开(公告)号：US10741210B1

公开(公告)日：2020-08-11

申请号：US16537311

申请日：2019-08-09

Applicant: Seagate Technology LLC

Inventor： Gary Ernest Hillukka ,  Evgeny Kharlsov ,  Josiah Natan Wernow ,  Kenneth A Haapala

IPC: G11B19/20 ,  G11B5/55

Abstract: HDDs including multiple heads driven by separate actuator spindles can read from or write to one or more platters simultaneously. Simultaneous active heads can be used to increase data rate or for other purposes. The multiple independently-actuated heads can access the same platter or different platters and may be moved across an associated platter surface in a number of different ways. However, multiple independently operating actuators may lead to mechanical coupling between the actuators. For example, as certain resonant frequencies, the movement of one actuator arm may cause unacceptable movement of another actuator arm within the HDD. This mechanical coupling can have detrimental effects on the HDD. The disclosed coupling observer and disable systems detect and mitigate detrimental effects of mechanical coupling between the independently operated actuators.

公开(公告)号：US10438620B1

公开(公告)日：2019-10-08

申请号：US15936215

申请日：2018-03-26

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Timothy Francis Ellis ,  Gary Ernest Hillukka ,  Joshua Ward Christensen ,  Puskal Prasad Pokharel

IPC: G11B5/596 ,  G11B20/12

Abstract: Systems and methods for servo zone transition optimization are described. In one embodiment, the storage system device includes a disk drive and a controller. In some embodiments, the controller may be configured to assess at least one operation of a read/write head of the disk drive; and format, based at least in part on the assessing of the read/write head, a disk surface of the disk drive with a first servo zone, a second servo zone, and an overlap region extending between a start point of the second servo zone and an end point of the first servo zone. In some cases, the overlap region starts towards a disk inner diameter (ID) and ends towards a disk outer diameter (OD).

公开(公告)号：US10410661B1

公开(公告)日：2019-09-10

申请号：US16172141

申请日：2018-10-26

Applicant: Seagate Technology LLC

Inventor： Riyan Alex Mendonsa ,  Walter R Eppler ,  Puskal P Pokharel ,  Gary Ernest Hillukka ,  Stephanie Hernandez

IPC: G11B5/54 ,  G11B5/60

Abstract: A hard disc drive includes a slider including a first reader and a second reader. The hard disc drive also includes a magnetic recording medium and a controller. The controller is configured to determine a distance between the slider and the magnetic recording medium based at least in part on amplitudes of read signals from both the first reader and the second reader.