公开(公告)号：US11379150B2

公开(公告)日：2022-07-05

申请号：US16777988

申请日：2020-01-31

Applicant: Seagate Technology LLC

Inventor： John Michael Bent ,  Ian Davies ,  Mohamad El-Batal ,  Ujjwal Lanjewar

IPC: G06F11/20 ,  G06F3/06 ,  G11B33/04 ,  G11B5/53

Abstract: Each disk drive in an array includes a housing that encloses a motor and at least one magnetic disk. The housing also encloses first and second actuators each with respective first and second heads that independently access the magnetic disk. The first actuator is mapped to a first logical unit and the second actuator is mapped to a second logical unit. A host interface of each disk drive facilitates access to the first and second logical units. A system includes a first storage controller attached to all of the first logical units as a first active server and attached to all of the second logical units as a first passive server. A second storage controller operates redundantly with the first storage controller. The second storage controller is attached to all of the second logical units as a second active server and attached to all of the first logical units as a second passive server.

公开(公告)号：US11377736B2

公开(公告)日：2022-07-05

申请号：US16745132

申请日：2020-01-16

Applicant: Seagate Technology LLC

Inventor： Riyan Alex Mendonsa ,  Martin Giles Blaber ,  Brett R. Herdendorf ,  Kevin A. Gomez

IPC: C23C16/455 ,  C23C16/48 ,  G11B13/08 ,  H01L21/02 ,  G11B5/31 ,  H01L21/67 ,  C23C16/46

Abstract: A system includes a chamber, a support structure disposed in the chamber, and one or more heads. The support structure is configured to support and position a substrate. The one or more heads includes an energy source coupled to a near-field transducer for providing localized energy towards the support structure at select locations within the chamber.

公开(公告)号：US20220198048A1

公开(公告)日：2022-06-23

申请号：US17127038

申请日：2020-12-18

Applicant: Seagate Technology LLC

Inventor： Vipin Singh Sehrawat

IPC: G06F21/62 ,  G06F21/60 ,  G06F21/31 ,  H04L9/08

Abstract: A method for distributed and private symmetric searchable encryption includes receiving encrypted data, creating a search index for one or more servers based on the encrypted data using a distributed point function (DPF), splitting the encrypted data into a number of portions based on the number of servers, and partitioning the servers into two or more groups. The method also includes updating the search index based on the splitting and the partitioning, transmitting the split encrypted data to the servers based on the updated search index, verifying the transmitted data using data not transmitted to the server, and determining, based on the verifying, whether any server deviated from an assigned protocol.

公开(公告)号：US11355144B1

公开(公告)日：2022-06-07

申请号：US17317277

申请日：2021-05-11

Applicant: Seagate Technology LLC

Inventor： Joseph M. Stephan ,  Robert Aaron Newman ,  Lars H. Ahlen ,  Aaron Michael Collins

IPC: G11B5/60 ,  G11B5/127 ,  G11B5/31

Abstract: A slider includes a slider body with an air-bearing surface and a top surface opposing the air-bearing surface. A plurality of slider bond pads are disposed on or parallel to the top surface and proximate to or at a trailing edge of the slider. The plurality of slider bond pads have an exposed surface facing away from the top surface of the slider body. One or more mounting supports extend from the top surface to a distance of at least 12 μm above the exposed surface of the plurality of slider bond pads.

公开(公告)号：US20220171727A1

公开(公告)日：2022-06-02

申请号：US17107576

申请日：2020-11-30

Applicant: Seagate Technology LLC

Inventor： Sayan GHOSAL

IPC: G06F13/36 ,  G06N3/08

Abstract: Data channel parameter optimization with intelligent selection of initial data channel conditions and optimization algorithm hyperparameters for use of a black box optimizer to optimize one or more data channel parameters. It is currently identified that the initial data channel condition affects the ability of a black box optimizer to optimize data channel parameters. In turn, by use of an intelligent agent (e.g., employing artificial intelligence or machine learning) to iteratively select optimized initial data channel conditions, the optimization of the data channel may be improved. Moreover, the sensitivity of the data channel parameters may be determined, which allows for identification of a subset of data channel parameters that are varied in an optimization approach. This may result in improved performance of the optimization without sacrificing optimized performance of the data channel.

公开(公告)号：US11349840B1

公开(公告)日：2022-05-31

申请号：US17091754

申请日：2020-11-06

Applicant: Seagate Technology LLC

Inventor： Ujjwal Lanjewar ,  Nilesh Govande ,  Basavaraj Kirunge

IPC: H04L9/40

Abstract: Heuristic based approach to authentication of requests in a stateless protocol environment. Heuristics may be applied to a request to calculate a trust level for the request. The trust level for a request may at least in part be based on request parameters for the request and one or more previously received requests in a user context profile. Thus, historical request metadata may be used in calculating a trust value of a received request. If the trust value for a request exceeds a trust threshold, the request may be authenticated without forwarding the request to an authentication server. Thus, for requests in which the trust value exceeds the trust threshold, system performance may be improved by not requiring computational overhead and/or network bandwidth to be used in authentication. In this regard, the format of the request may still comport with the stateless protocol, but authentication may be made more efficient.

公开(公告)号：US11347573B2

公开(公告)日：2022-05-31

申请号：US16719771

申请日：2019-12-18

Applicant: Seagate Technology LLC

Inventor： Abhay T. Kataria ,  Harathi Tadepalli ,  Robert Pomeroy ,  Daniel J. Coonen ,  Brandon W. Muhlach

IPC: G06F11/00 ,  G06F11/07 ,  H04N1/00

Abstract: A method for identifying a drive malfunction source includes receiving as input multiple drive event records each recorded by a different one of multiple storage drives in a mass storage system. Among other data, each one of the drive event records including internal tasks performed by the associated storage drive and communications transmitted between an external host and a controller of the associated storage drive. The method may further include comparing the drive event records using a processor to identify at least one discrepancy in recorded drive events indicative of the drive malfunction source.

公开(公告)号：US11344990B2

公开(公告)日：2022-05-31

申请号：US16728251

申请日：2019-12-27

Applicant: Seagate Technology LLC

Inventor： Gary J. Kunkel ,  Zoran Jandric

IPC: G11B5/31 ,  B24B37/013 ,  B24B37/04 ,  G11B5/60

Abstract: An assembly for lapping multiple row bars, the assembly including a carrier having at least one carrier bond pad, multiple row bars adjacent to each other in a stack, wherein a first row bar of the stack is positioned closer to the carrier than any of the other multiple row bars of the stack and comprises at least one row bar bond pad, an electrical connection between at least one of the carrier bond pads and at least one of the row bar bond pads of the first row bar, and at least one electrical trace extending through at least two of the multiple row bars and electrically connected to at least the first row bar and one additional row bar of the stack. An outermost row bar of the stack includes an outer surface and at least one electronic lapping guide.

公开(公告)号：US11340972B1

公开(公告)日：2022-05-24

申请号：US16791220

申请日：2020-02-14

Applicant: Seagate Technology LLC

Inventor： Seokhun Jeon ,  MinGyeong Son ,  Seung Youl Jeong

IPC: G06F11/00 ,  G06F11/07 ,  G06F11/10

Abstract: Systems and methods are disclosed for categorizing error types encountered in data access operations based on bit information from a data segment. An example apparatus includes a circuit configured to perform error recovery for one or more data segments including determining an error recovery operation of a plurality of error recovery operations to perform based on bit information of the one or more data segments. The example circuit also performs the determined error recovery operation.

公开(公告)号：US20220137681A1

公开(公告)日：2022-05-05

申请号：US17084928

申请日：2020-10-30

Applicant: Seagate Technology LLC

Inventor： Charles Morris ,  Kevin Van Pelt ,  Lon Stevens

IPC: G06F1/18 ,  G06F1/16

Abstract: A system includes a data shuttle with rows of data storage devices, which are communicatively coupled to a shared printed circuit board assembly. Each row includes multiple data storage devices. The printed circuit board assembly is configured to communicatively couple to a first controller to enable storing data to the data storage devices and to communicatively coupled to a second controller to enable transferring data from the data storage devices.