公开(公告)号：US20190042343A1

公开(公告)日：2019-02-07

申请号：US16153225

申请日：2018-10-05

Applicant: Seagate Technology LLC

Inventor： Antoine Khoueir ,  Stacey Secatch ,  Kevin Gomez ,  Ryan Goss

IPC: G06F11/07 ,  G11C16/34 ,  G11C16/16 ,  G11C16/26

CPC classification number: G06F11/076 ,  G06F11/073 ,  G06F11/1072 ,  G06F12/0246 ,  G06F2212/1016 ,  G06F2212/1032 ,  G06F2212/7205 ,  G06F2212/7207 ,  G11C11/5642 ,  G11C16/0483 ,  G11C16/16 ,  G11C16/26 ,  G11C16/3459

Abstract: Method and apparatus for managing data in a semiconductor memory, such as but not limited to a three dimensional (3D) NAND flash memory array. In some embodiments, the memory has non-volatile memory cells arranged into addressable blocks. Each memory cell is configured to store multiple bits. A program/read control circuit programs data sets to and reads data sets from the memory cells in the addressable blocks to service a sequence of host access commands. The circuit concurrently performs background reads in conjunction with the servicing of the host access commands. The background reads result in the reading of a different data set from each of the addressable blocks over each of a succession of time intervals of selected duration. The background reads condition the memory cells prior to a first read operation associated with the host access commands.

公开(公告)号：US20190035422A1

公开(公告)日：2019-01-31

申请号：US16113034

申请日：2018-08-27

Applicant: Seagate Technology LLC

Inventor： Christopher Neil Harvey ,  Aidan Dominic Goggin ,  Kelly Elizabeth Hamilton ,  Reyad Mehfuz

IPC: G11B5/48

CPC classification number: G11B5/4866 ,  G11B5/314 ,  G11B5/6088 ,  G11B7/126 ,  G11B2005/0021

Abstract: An apparatus includes a first waveguide core extending along a light-propagation direction and configured to receive light from a light source at a combined transverse electric (TE) mode and a transverse magnetic (TM) mode. A second waveguide core is spaced apart from the first waveguide core and is configured to couple light at a TM mode to the second waveguide core. A near-field transducer (NFT) is disposed at a media-facing surface of a write head, the NFT receiving the light from the first waveguide core or the second waveguide core and heating a magnetic recording medium in response thereto.

公开(公告)号：US10192575B1

公开(公告)日：2019-01-29

申请号：US15798535

申请日：2017-10-31

Applicant: Seagate Technology LLC

Inventor： Roger A. Resh

IPC: G11B21/02 ,  G11B5/48

Abstract: An apparatus includes at least one actuator shaft. First and second head stack assemblies are coaxially located on the actuator shaft(s). The first and second head stack assemblies each include: at least one bearing having an inner race coupled to an outer surface of the actuator shaft(s); an E-block surrounding an outer race of the at least one bearing; an annular gap is between the E-block and the outer race of the at least one bearing; a ring of bonding material filling the annular gap; and an access gap providing a fluid path to the annular gap from at least one of a top and a bottom of the E-block.

公开(公告)号：US10192574B2

公开(公告)日：2019-01-29

申请号：US15783164

申请日：2017-10-13

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Sarbeswar Sahoo ,  Martin Blaber ,  Hui Brickner ,  Tong Zhao ,  Yuhang Cheng ,  John Duda ,  Tae-Woo Lee

IPC: G11B7/00 ,  G11B5/31 ,  G11B5/60 ,  G11B5/00

Abstract: Devices having an air bearing surface (ABS), the devices including a write pole; a near field transducer (NFT) that includes a peg and a disc, wherein the peg is at the ABS of the device; a heat sink positioned adjacent the disc of the NFT; a dielectric gap positioned adjacent the peg of the NFT at the ABS of the device; and a conformal diffusion barrier layer positioned between the write pole and the dielectric gap, the disc, and the heat sink, wherein the conformal diffusion barrier layer forms at least one angle that is not greater than 135°.

公开(公告)号：US20190018727A1

公开(公告)日：2019-01-17

申请号：US15652038

申请日：2017-07-17

Applicant: Seagate Technology LLC

Inventor： Stephen S. Huh ,  Ian Davies ,  Douglas William Dewey

IPC: G06F11/07 ,  G06F3/06 ,  G06F11/14

Abstract: A storage system periodically replicates data to another storage system for data backup and protection. The storage system is configured to detect an irregularity potentially causing a fault in the storage system. Such a detected irregularity may a component failure in a storage device, a temperature change in a storage device, etc. In response to the detected irregularity, the storage system increases a replication rate of data to the backup storage system.

公开(公告)号：US10180791B2

公开(公告)日：2019-01-15

申请号：US15682132

申请日：2017-08-21

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Andrew M. Kowles

IPC: G06F12/00 ,  G06F3/06 ,  G06F13/00 ,  G06F13/28

Abstract: A method for data steering in tiered storage is described. In one embodiment, the method includes ranking a plurality of storage areas of a storage device according to at least one property of the plurality of storage areas. In some embodiments, the plurality of storage areas include at least a first storage area and a second storage area. The method includes obtaining a sample of data at the storage device, passing the sample of data through one or more compression codecs, and analyzing a result of passing the sample of data through the one or more compression codecs. In some embodiments, the result includes a score of compression savings associated with the sample of data. The method includes storing the data in one of the plurality of storage areas based at least in part on the analyzing the result of passing the sample of data through the one or more compression codecs.

公开(公告)号：US20190013046A1

公开(公告)日：2019-01-10

申请号：US15642159

申请日：2017-07-05

Applicant: Seagate Technology LLC

Inventor： Ajay Narayan Kulkarni ,  Timothy R. Feldman

IPC: G11B20/18 ,  G06F12/10 ,  G11B20/12 ,  G06F3/06

Abstract: A storage system such as a hard disc drive (HDD), solid-state drive (SSD), hybrid drive (SSHD), storage rack, set of storage racks, JBOD, array of discs, etc. may include a variety of storage media. Failures may be detected in the storage media of the storage system. Such a failure may affect the physical capacity of the storage system. A storage controller of the storage system initiates a media conversion that converts a portion of the storage media from media storing data according to a first recording scheme to a media storing data according to a second recording scheme. The second recording scheme stores data at a higher density compared to the first recording scheme.

公开(公告)号：US20190012106A1

公开(公告)日：2019-01-10

申请号：US16128203

申请日：2018-09-11

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Timothy R. Feldman

IPC: G06F3/06 ,  G06F12/02

CPC classification number: G06F3/0644 ,  G06F3/0608 ,  G06F3/064 ,  G06F3/0661 ,  G06F3/0665 ,  G06F3/0676 ,  G06F12/023 ,  G06F2212/401 ,  G06F2212/7201

Abstract: Methods, systems, and apparatuses are described for provisioning storage devices. An example method includes specifying a logical zone granularity for logical space associated with a disk drive. The method further includes provisioning a zone of a physical space of the disk drive based at least in part on the specified logical zone granularity. The method also includes storing compressed data in the zone in accordance with the provisioning.

公开(公告)号：US10177771B1

公开(公告)日：2019-01-08

申请号：US15724001

申请日：2017-10-03

Applicant: Seagate Technology LLC

Inventor： Jason Bellorado ,  Marcus Marrow ,  Zheng Wu

IPC: H03L7/081 ,  H03L7/07 ,  H03L7/091 ,  H03K5/135 ,  H04L7/033 ,  H03K5/00 ,  H04L7/00

Abstract: An apparatus may include a circuit configured to receive first and second samples of an underlying data from respective first and second sample periods and which correspond to respective first and second sensors, a phase control value may have first and second values during respective first and second sample periods. The phase control value may be a control value for a sample clock signal. The circuit may also determine a difference in the phase control value between the first value and the second value. The circuit may then digitally interpolate the first and second samples to produce a phase shifted first and second samples where the digital interpolation of at least one of the first and second samples mat be at least in part based on the difference in the phase control value to compensate for a phase misalignment between the first sample and the second sample.

公开(公告)号：US10176834B2

公开(公告)日：2019-01-08

申请号：US15867509

申请日：2018-01-10

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Jian Qiang ,  Xiong Liu

IPC: G11B21/02 ,  G11B5/56 ,  G11B20/10 ,  G11B20/12 ,  G11B5/012 ,  G11B5/55

Abstract: Methods, systems, and apparatuses are described for provisioning storage devices. An example method includes determining a write status of an adjacent track that is adjacent to a target track of a shingled magnetic recording (SMR) disk drive. The method may further include determining an offset for a write head based on the write status of the adjacent track and positioning the write head according to the offset.