公开(公告)号：US20210133151A1

公开(公告)日：2021-05-06

申请号：US16669696

申请日：2019-10-31

Applicant: Seagate Technology LLC

Inventor： Yasaman Keshtkarjahromi ,  Mehmet Fatih Erden

IPC: G06F16/182 ,  G06F16/903

Abstract: A set of N network-coupled edge storage nodes are selected to store a file of size |F|. The N edge storage nodes have heterogeneous storage availability and are ordered from a largest storage availability at the first edge storage node to a smallest availability at the Nth edge storage node. A value Z

公开(公告)号：US10990474B1

公开(公告)日：2021-04-27

申请号：US16811790

申请日：2020-03-06

Applicant: Seagate Technology LLC

Inventor： John Bent ,  Kenneth K. Claffey ,  Ian Davies ,  Peter Maddocks

IPC: G06F11/10 ,  G06F11/07 ,  G06F11/30

Abstract: A method includes, upon a read operation for a stripe of a storage device, determining a percentage amount of potential read amplification for the read operation. A current age of the stripe in the read operation is determined as a percentage of a longest safe elapsed time between read scrub operations on a stripe of the storage device. A read scrub operation is performed on the stripe when the current age is greater than the percentage amount of potential read amplification.

公开(公告)号：US10989649B2

公开(公告)日：2021-04-27

申请号：US15840763

申请日：2017-12-13

Applicant: Seagate Technology LLC

Inventor： Jian Chen ,  Xiong Liu ,  Wei Sung Lee ,  Erwin Mochtar Wijaya

IPC: G01N19/02 ,  G11B5/54 ,  G11B21/12

Abstract: Measuring ramp friction in a disk drive including receiving a lift tab ramp load time profile for a voice coil motor and determining a load torque profile for a lift tab on the ramp based at least on the received ramp load time profile. The measuring also includes receiving a lift tab ramp unload time profile for the voice coil motor and determining an unload torque profile for the lift tab on the ramp based at least on the received ramp unload time profile. The measuring also includes calculating a ramp friction torque component based on the determined load torque profile and unload torque profile.

公开(公告)号：US20210120667A1

公开(公告)日：2021-04-22

申请号：US17113614

申请日：2020-12-07

Applicant: Seagate Technology LLC

Inventor： Michael Richard Fabry ,  William Bradford Green

IPC: H05K1/02 ,  G01R31/28 ,  H05K3/24 ,  H05K1/11

Abstract: A printed circuit board includes a substrate and at least one electrical circuit provided at least partially on a surface layer of thee printed circuit board. The electrical circuit includes an electrical trace that is in electrical connection with a test pad provided for accessibility on the surface layer, the test pad being sized and shaped for probing to test an aspect of the circuit, the test pad having a conductive probe surface that is structured to provide at least one vertical surface that extends from the probe surface toward the surface layer and thus providing an edge between the vertical surface and the probe surface, the probe surface having a coating of a material to protect the conductive probe surface from corrosion.

公开(公告)号：US10977189B2

公开(公告)日：2021-04-13

申请号：US16562518

申请日：2019-09-06

Applicant: Seagate Technology LLC

Inventor： Kristofer Carlson Conklin ,  Ryan James Goss ,  Reid Alan Welch

IPC: G06F12/1018

Abstract: Technologies are described herein for or reducing the size of the forward mapping table in an SSD or other storage device using hashing. A physical address of a storage location within a storage media is determined for the storage of data associated with a logical block address. The data is written to the storage location and a hash value is computed from a representation of the physical address using a hash function, where the size of the hash value is smaller than the representation of the physical address and the hash value points to a plurality of separate storage locations in the storage media. The hash value is stored in the forward mapping table associated with logical block address as opposed to the representation of the physical address.

公开(公告)号：US10971180B2

公开(公告)日：2021-04-06

申请号：US15638453

申请日：2017-06-30

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Sethuraman Jayashankar ,  Sarbeswar Sahoo

IPC: G11B5/60 ,  G11B5/31 ,  G11B5/00 ,  C23C14/48

Abstract: A method of forming a near field transducer (NFT), the method including the steps of depositing a primary material; and implanting a secondary element, wherein both the primary material and the secondary element are chosen such that the primary material is densified via implantation of the secondary element.

公开(公告)号：USRE48497E1

公开(公告)日：2021-03-30

申请号：US15399277

申请日：2017-01-05

Applicant: Seagate Technology LLC

Inventor： Tatsuaki Amemura

IPC: G06F12/00 ,  G06F21/79 ,  G06F21/81

Abstract: In electronic equipment device 1, a limitation level on reading an access level to selectively control the ability to read data from a USB flash drive (storage device) 2 is set to a setting section by an access level setting unit 3 in advance. The USB flash drive 2 ascertains the setting at the setting section 3 access level when the USB flash drive is connected to the electronic equipment 1 and limits reading data based on the determined setting device. If the limitation access level does not match with the condition for permitting data read-out as determined in USB flash drive 2 permit the reading of data, the USB flash drive 2 prohibits the electronic equipment 1 device from reading out data from a memory 24 of the USB flash drive by removing an application of power from the external device to the memory. By executing the processing for limiting data read-out at the side of the USB flash drive 2, unauthorized leakage of data can easily be prevented.

公开(公告)号：US10964354B1

公开(公告)日：2021-03-30

申请号：US16387070

申请日：2019-04-17

Applicant: Seagate Technology LLC

Inventor： Robert D. Turner ,  Yuhang Cheng ,  Peter W. Kanas ,  Martin Liam McGarry ,  Peter Kevin McGeenhin ,  Kevin R. Heim ,  Edward Charles Gage ,  Shaikh Mubassar Ali ,  Huazhou Lou

IPC: G11B33/14 ,  G11B13/08 ,  G11B5/012 ,  G11B5/31 ,  G11B5/00

Abstract: A heat-assisted magnetic recording device is disposed in a hermetically sealed enclosure. The device includes a slider comprising a reader, a writer, and an optical waveguide configured to couple light from a light source to a near-field transducer situated at or near an air bearing surface of the slider. The near-field transducer comprises an enlarged portion and a peg extending from the enlarged portion in a direction of the air bearing surface. A fill gas is provided within the enclosure. The fill gas comprises a mixture of a low-density, inert gas and at least one gas that oxidizes carbon, where the total carbon oxidizing gas concentration of the fill gas is 3-50% by volume. In certain embodiments, the fill gas comprises a hydrogen concentration sufficient to retard oxidation of the peg when the peg is at an operating temperature associated with write operations.

公开(公告)号：US10964342B1

公开(公告)日：2021-03-30

申请号：US16890385

申请日：2020-06-02

Applicant: Seagate Technology LLC

Inventor： Robbee Lee Grimm ,  Greg Arthur Schmitz ,  Venkateswara Rao Inturi ,  Aaron Michael Collins

IPC: G11B5/48

Abstract: A method of controlling a shape and size of at least one solder joint of a magnetic recording head that includes a trailing surface and a plurality of bond pads, wherein each bond pad comprises a base layer comprising a top surface and a top edge, the method including the steps of forming at least one solder dam by covering a portion of the top surface of the base layer of at least one of the bond pads with a coating layer that comprises a nonwettable, electrically conductive material positioned adjacent to the top edge of at least one of the bond pads, thereby defining a coated portion and an uncoated portion of the base layer, and applying solder material to the uncoated portion of the base layer adjacent to the solder dam so that the coating layer constrains movement of the solder material beyond the uncoated portion.

公开(公告)号：US10963188B1

公开(公告)日：2021-03-30

申请号：US16454354

申请日：2019-06-27

Applicant: Seagate Technology LLC

Inventor： Mehmet Fatih Erden ,  Manuel Alexander Offenberg

IPC: G06F3/06 ,  G06N3/08 ,  G06K9/00 ,  G06K9/62 ,  G06F13/16

Abstract: A digital sensor stream is received from a sensor. A domain transform is performed on the digital sensor stream to produce first and second substreams. The first substream is larger than the second substream. The first substream is stored in cold storage and the second substream is stored in a second storage that has faster access times than the cold storage. Deep machine learning is performed on the second substream, the results of which may be stored in the second storage.