公开(公告)号：US11197393B2

公开(公告)日：2021-12-07

申请号：US16407256

申请日：2019-05-09

Applicant: Seagate Technology LLC

Inventor： Laurence A. Harvilchuck ,  Alex Carl Worrall

IPC: G06F1/20 ,  H05K7/20 ,  F28F9/02 ,  F16L37/14 ,  F16L37/18 ,  F16L37/32 ,  F28F3/12 ,  F28F9/007

Abstract: A method for assembling a modular cooling system includes attaching a support manifold to a first rail of an equipment rack, the support manifold defining a coolant supply channel and a coolant return channel; and mounting a first cold plate to the support manifold including engaging a manifold supply connector with a plate supply connector in fluid communication, the manifold supply connector being connected in fluid communication with the coolant supply channel of the support manifold, the plate supply connector being connected in fluid communication with a cooling system disposed within the first cold plate.

公开(公告)号：US11183215B1

公开(公告)日：2021-11-23

申请号：US16524551

申请日：2019-07-29

Applicant: Seagate Technology LLC

Inventor： Tong Zhao ,  Li Wan ,  Michael Christopher Kautzky

IPC: G11B5/31 ,  G11B5/73 ,  H01F10/30 ,  G11B5/66 ,  B32B7/022 ,  B82B1/00 ,  B82Y10/00

Abstract: A thin film structure (e.g., a near-field transducer), includes a first surface parallel to a substrate on which the thin film structure is deposited and two other surfaces orthogonal to the first surface. The first surface and the two other surfaces have respective first, second, and third selected plane orientations with respective first, second, and third atomic packing factors. The first, second, and third selected plane orientations are selected to maximize an average of the first, second, and third atomic packing factors.

公开(公告)号：US11176963B1

公开(公告)日：2021-11-16

申请号：US17016326

申请日：2020-09-09

Applicant: Seagate Technology LLC

Inventor： Brett R. Herdendorf ,  Riyan Alex Mendonsa ,  Krishnan Subramanian ,  Wolfgang Rosner

IPC: G11B5/54 ,  G11B5/48 ,  G11B5/55 ,  G11B21/22 ,  G11B17/02

Abstract: A brake crawler for an elevator-type hard disk drive generally includes a first and second set of clamp arms vertically arranged, each of the first and second sets of clamp arms being capable of exerting a clamping force on a shaft or slider via activation or deactivation of an actuator element associated with each set of clamp arms. The brake crawler further includes an actuator element disposed between the first and second set of clamp arms which allows for movement of the first set of clamp arms away from the second set of clamp arms upon a change in state of the actuator element. Via a specific sequence of activating and deactivating various of the actuator elements associated with the brake crawler, the brake crawler is capable of inch worm-type movement up and down the shaft.

公开(公告)号：US20210335386A1

公开(公告)日：2021-10-28

申请号：US17238079

申请日：2021-04-22

Applicant: Seagate Technology LLC

Inventor： Chubing Peng

IPC: G11B5/31

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：US20210334008A1

公开(公告)日：2021-10-28

申请号：US16855041

申请日：2020-04-22

Applicant: Seagate Technology LLC

Inventor： Abhay T. Kataria ,  LingZhi Yang ,  Jonathan H. Ormsby

IPC: G06F3/06 ,  G06N3/08

Abstract: A background operation is internally triggered by firmware of a disk drive. During a training phase defined by a. first time period, access latency of host commands is monitored during rotational position sorting command selection. During a sorting phase after the training phase, a sorting threshold is defined based on the access latencies measured during the training phase. The background command is selected for execution in the sorting phase if the seek and rotational latency is less than the sorting threshold.

公开(公告)号：US11157364B1

公开(公告)日：2021-10-26

申请号：US16915560

申请日：2020-06-29

Applicant: Seagate Technology LLC

Inventor： David Andrew Rice ,  Ajay Narayan Kulkarni ,  Brian T. Edgar

IPC: G06F11/10 ,  G11B20/18 ,  G11B5/48 ,  G11B20/12

Abstract: ECC is used to for controlling errors in blocks of data by including a measure of redundancy within the data for recovering one or more unreadable portions of the data. A codeword includes at least a message and one or more additional ECC blocks. In the event of an unreadable sector, the ECC is decoded and used to recover the erroneous or missing portion(s) of the message. With disc access parallelism, ECCs can now be distributed across data storage surfaces and/or multiple storage platters. Distribution of ECCs increases the likelihood of recovering data from a head failure or from burst errors on a data storage surface and adds the option to decode parity after only 1/n revolutions.

公开(公告)号：US20210328597A1

公开(公告)日：2021-10-21

申请号：US16849491

申请日：2020-04-15

Applicant: Seagate Technology LLC

Inventor： Naveen Kumar ,  Shuhei Tanakamaru ,  Erich Franz Haratsch

IPC: H03M13/01 ,  H03M13/11 ,  H03M13/39

Abstract: Hard errors are determined for an unsuccessful decoding of codeword bits read from NAND memory cells via a read channel and input to a low-density parity check (LDPC) decoder. A bit error rate (BER) for the hard errors is estimated and BER for the read channel is estimated. Hard error regions are found using a single level cell (SLC) reading of the NAND memory cells. A log likelihood ratio (LLR) mapping of the codeword bits input to the LDPC decoder is changed based on the hard error regions, the hard error BER, and/or the read channel BER.

公开(公告)号：US20210327463A1

公开(公告)日：2021-10-21

申请号：US17362117

申请日：2021-06-29

Applicant: Seagate Technology LLC

Inventor： John Bernard McGurk ,  Reyad Mehfuz ,  Christopher Neil Harvey ,  Aidan Dominic Goggin

IPC: G11B5/48 ,  G02B6/122 ,  G11B5/60 ,  G11B13/04 ,  G11B5/31

Abstract: An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide having a gap portion is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer (NFT) that directs energy resulting from plasmonic excitation to a recording medium. An optical isolator is disposed over the gap portion.

公开(公告)号：US11144654B2

公开(公告)日：2021-10-12

申请号：US16296800

申请日：2019-03-08

Applicant: Seagate Technology LLC

Inventor： Saheb Biswas ,  Kevin Gautam Sternberg ,  David Michael Seesdorf ,  Timothy John Courtney

IPC: G06F21/60 ,  H04L29/06 ,  G06F16/23 ,  H04L9/32 ,  G06F21/64

Abstract: A system includes an environment-aware storage drive comprising one or more storage medium with a location-based service wherein the environment-aware storage drive generates a signal containing information about a location of the storage drive relative to a geo-fenced area and updates a ledger unit of an event happening to the storage drive based on the signal, wherein the event is related to the current environment of the storage drive. The ledger unit keeps track of a number of events and/or data received from the environment-aware storage drive. A policy unit determines an expandable set of security policies for the storage drive triggered by the event and/or data, wherein the security policies specify access restrictions to the environment-aware storage drive based on its current environment. The policy unit transmits and enforces the set of security policies on the environment-aware storage drive to prevent data from being theft from the storage drive.

公开(公告)号：US11138069B2

公开(公告)日：2021-10-05

申请号：US16212242

申请日：2018-12-06

Applicant: Seagate Technology LLC

Inventor： Stephen H. Perlmutter ,  Steven S. Williams ,  Benjamin J. Scott ,  Andrew J. Louder ,  Kyumsung Lee ,  Robert W. Dixon

IPC: G06F11/00 ,  G06F11/10 ,  G11C29/52 ,  H03M13/29

Abstract: Apparatus and method for storing data in a non-volatile memory (NVM), such as a flash memory in a solid-state drive (SSD). In some embodiments, a distributed storage space of the NVM is defined to extend across a plural number of regions of the NVM. A non-standard parity data set is provided having a plural number of data elements greater than or equal to the plural number of regions in the storage space. The data set is written by storing a first portion of the data elements and a first parity value to the plural number of regions and a remaining portion of the data elements and a second parity value to a subset of the plural number of regions. The regions can comprise semiconductor dies in a flash memory, and the distributed storage space can be a garbage collection unit formed using one erasure block from each flash die.