公开(公告)号：US20220236911A1

公开(公告)日：2022-07-28

申请号：US17158187

申请日：2021-01-26

Applicant: Seagate Technology LLC

Inventor： Marc Timothy Jones

IPC: G06F3/06 ,  G06F16/2455

Abstract: Methods, apparatuses, and computer-readable media for streaming arbitrarily large amounts of data through computational storage programs of a computational storage device. A computational storage device comprises a storage media, a computational storage processor, and a controller. A firmware of the controller comprises a plurality of streaming drivers, each associated with a data source or data destination of the storage device. The firmware further comprises a buffer abstraction layer operable to read data from a data source through an associated ingress streaming driver of the plurality of streaming drivers to provide a source data stream for a computational storage program executing on the computational storage processor. The buffer abstraction layer is further operable to receive a destination data stream from the computational storage program and write data to a data destination through an associated egress streaming driver of the plurality of streaming drivers.

公开(公告)号：US20220231706A1

公开(公告)日：2022-07-21

申请号：US17150861

申请日：2021-01-15

Applicant: Seagate Technology LLC

Inventor： Zheng WANG ,  Ara PATAPOUTIAN

IPC: H03M13/39 ,  H03M13/11 ,  H03M13/15 ,  G11C16/34 ,  G11C16/30 ,  G06N20/00

Abstract: Estimation of read parameters for a read channel of a solid-state storage device using a machine learning apparatus. The machine learning apparatus may be provided with signal count metrics from multiple regions of the memory cell signal space and syndrome weights from an error correction code. Other inputs may also be provided comprising metrics of the memory or read operations. In an example, the read parameters may include one or more reference threshold voltage values for read voltages applied to a memory cell and/or log-likelihood ratio (LLR) values for the memory cell.

公开(公告)号：US11386924B1

公开(公告)日：2022-07-12

申请号：US17148717

申请日：2021-01-14

Applicant: Seagate Technology LLC

Inventor： Chubing Peng

IPC: G11B11/105 ,  G11B5/48 ,  G11B5/31 ,  G11B5/00

Abstract: A recording head has a light source that emits light at a wavelength in a wavelength range of 260 nm to 460 nm inclusive. A slider body of the light source includes a magnetic pole extending to a media-facing surface of the recording head and integrated photonics that deliver the light to a recording medium. The integrated photonics include a waveguide that couples the light from the light source to the media-facing surface of the slider and a near-field transducer coupled to receive the light from the waveguide. The near-field transducer has a surface plasmon plate and a peg extending from the surface plasmon plate. The surface plasmon plate is formed of a first material having a first plasmonic quality factor (Q-factor) above 5 in the wavelength range, the peg formed of a second material having a second Q-factor above 1.2 in the wavelength range.

公开(公告)号：US11380354B2

公开(公告)日：2022-07-05

申请号：US17238079

申请日：2021-04-22

Applicant: Seagate Technology LLC

Inventor： Chubing Peng

IPC: G11B5/48 ,  G11B5/31 ,  G11B5/00

Abstract: A recording head includes a nanorod configured to heat a hotspot on a recording media, a plasmonic plate configured to concentrate an electric field to excite the nanorod, and a heat sink configured to dissipate heat from the nanorod. The recording head includes a first diffusion barrier plate configured to resist diffusion of materials between the plasmonic plate and the nanorod and a second diffusion barrier plate configured to resist diffusion of materials between the heat sink and the nanorod. The first diffusion barrier plate is disposed between the nanorod and the plasmonic plate and is coupled to a bottom surface of the nanorod. The second diffusion barrier plate is disposed between the heat sink and the nanorod and is coupled to the top surface of the nanorod.

公开(公告)号：US11374741B2

公开(公告)日：2022-06-28

申请号：US16511832

申请日：2019-07-15

Applicant: Seagate Technology LLC

Inventor： Manuel Alexander Offenberg ,  Simon Thavatchai Phatigaraphong ,  Kenneth K. Claffey

IPC: H04L29/06 ,  H04L9/08 ,  G06F16/23 ,  H04L9/30 ,  H04L9/06 ,  H04L9/14

Abstract: A system comprises one or more storage entities (SEs) each configured to store data for applications that rely on higher levels of data integrity, wherein each of the SEs has its own cryptographic identity in the form of a unique root identity key pair of public and private keys created at manufacturing time. Each SE generates one or more SE-specific asymmetric data owner keys upon invocation of a smart contract by a prospective data owner. The system further comprises a distributed ledger provisioned to the SEs and configured to maintain all public keys and/or public key certificates of the SEs. The system also comprises a key manager configured to hold all SE-specific data owner public keys and SE data access control keys, wherein the data stored on the SEs is protected by the SE-specific data access control keys wrapped by the SE-specific data owner keys based on current data ownership.

公开(公告)号：US11372553B1

公开(公告)日：2022-06-28

申请号：US17139087

申请日：2020-12-31

Applicant: Seagate Technology LLC

Inventor： John Michael Bent ,  Ujjwal Lanjewar ,  Kenneth K. Claffey ,  Raj Bahadur Das

IPC: G06F12/00 ,  G06F3/06

Abstract: A first data storage rack has a first computing unit coupled to a first plurality of storage drives via a first storage controller. A second data storage rack has a second computing unit coupled to a second plurality of storage drives via a second storage controller. A first rack-to-rack storage link cable couples the first computing unit to the second storage controller such that the first computing unit can provide access to the second plurality of drives in response to a failure that prevents the second computing unit from providing access to the second plurality of drives via a system network.

公开(公告)号：US20220201884A1

公开(公告)日：2022-06-23

申请号：US17129500

申请日：2020-12-21

Applicant: Seagate Technology LLC

Inventor： Brett Herdendorf ,  Riyan Mendonsa ,  Krishnan Subramanian

IPC: H05K5/02

Abstract: An apparatus with a housing which stores a plurality of data storage magazines where each data storage magazine includes a plurality of data storage devices. The housing includes a movable carriage configured to selectively couple a set of data storage devices held by a particular data storage magazine to a host device. The housing also includes a physical locking mechanism configured to selectively prevent data storage devices from coupling to the host device.

公开(公告)号：US20220197802A1

公开(公告)日：2022-06-23

申请号：US17129863

申请日：2020-12-21

Applicant: Seagate Technology LLC

Inventor： Sivakumar Sambandan

IPC: G06F12/0815 ,  G06F13/40

Abstract: Cache coherency of a global address space of a cache can be maintained with one or more tier control units (TCUs). The global address space of the cache may be shared by multiple domains. Domains may include multiple controllers and a local interconnect operatively coupling the controllers to the cache. The local interconnect of each domain may maintain a cache coherency of a local address space of the cache shared by the controllers of the domain. The one or more TCUs may be operatively coupled to the local interconnects of the domains to maintain the cache coherency of the global address space.

公开(公告)号：US20220196571A1

公开(公告)日：2022-06-23

申请号：US17125754

申请日：2020-12-17

Applicant: Seagate Technology LLC

Inventor： Yen Eng FAM ,  Jun Lee KOK ,  Bak Leng LIM ,  Yen Ling LIM

IPC: G01N21/956 ,  G01N21/88 ,  G06T7/00

Abstract: A defect inspection system provides an image of a surface of a hard drive media to a machine learning model that is trained to identify predefined classifications of abnormal surface patterns on the hard drive media, each of the predefined classifications being associated in system memory with a severity indicator. The defect inspection model analyzes the image and generates and output indicating that the image includes a pattern consistent with a select classification of the predefined classifications of abnormal surface patterns. When the severity indicator for the select classification satisfies a failure condition, the defect inspection system automatically implements a corrective action.

公开(公告)号：US11360671B2

公开(公告)日：2022-06-14

申请号：US16935527

申请日：2020-07-22

Applicant: Seagate Technology LLC

Inventor： Jian Qiang ,  Jose Mari Toribio ,  Teck Khoon Lim ,  Wenxiang Xie ,  Xiong Liu

IPC: G06F3/06 ,  G06F11/07

Abstract: An adjacent track interference (ATI) metric is determined for each of a plurality of regions of a single surface of a magnetic disk. Based on the ATI metrics, each of the regions is assigned a region-specific directed offline scan (DOS) criterion, at least two of the DOS criteria being different from one another. Based on a write count of a track within one of the regions satisfying the associated region-specific DOS criterion, a DOS remediation of the track is performed.