公开(公告)号：US11449643B2

公开(公告)日：2022-09-20

申请号：US16801861

申请日：2020-02-26

Applicant: Seagate Technology LLC

Inventor： Christopher Nicholas Allo

IPC: G06F21/78 ,  G06F21/60 ,  G06F21/33 ,  G06F8/61 ,  G06F3/06 ,  G06F21/57

Abstract: A distributed data storage system can connect a customization module to at least one host and a second data storage device via a network controller. The customization module may disconnect the first data storage device from the host and second data storage device prior to assessing a security operation of the first data storage device with the customization module, generating an optimization strategy with the customization module based on the assessed security operation, implementing the optimization strategy in the first data storage device to alter at least one security parameter of the first data storage device, and then connecting the first data storage device to the host and second data storage device to allow at least one data access to be executed to the first data storage device with the altered at least one security parameter.

公开(公告)号：US20220295668A1

公开(公告)日：2022-09-15

申请号：US17200347

申请日：2021-03-12

Applicant: Seagate Technology LLC

Inventor： Akhil Namboori

IPC: H05K7/20 ,  G11B33/14

Abstract: A data storage device including a passive cooling system. The data storage device including an enclosure and a printed circuit board coupled to the enclosure. The data storage device also including a vapor chamber coupled to the printed circuit board and one or more heat pipes in fluid communication with the vapor chamber. The vapor chamber and one or more heat pipes including a two-phase liquid therein and defining a thickness of less than or equal to 0.7 mm. The two-phase liquid dissipating heat within the data storage device by evaporating and condensing. In some embodiments, the data storage device also including a disk separator positioned between adjacent recording disks and acting similar to the vapor chamber.

公开(公告)号：US20220293132A9

公开(公告)日：2022-09-15

申请号：US17008208

申请日：2020-08-31

Applicant: Seagate Technology LLC

Inventor： Kevin A. GOMEZ ,  Dan MOHR ,  Daniel Joseph KLEMME ,  Aditya JAIN

IPC: G11B20/18 ,  G11B20/10 ,  G11B20/12

Abstract: Implementations described and claimed herein provide a high-capacity, high-bandwidth scalable storage device. The scalable storage device includes a layer stack including at least one memory layer and at least one optical control layer positioned adjacent to the memory layer. The memory layer includes a plurality of memory cells and the optical control layer is adapted to receive optically-encoded read/write signals and to effect read and write operations to the plurality of memory cells through an electrical interface.

公开(公告)号：US20220291844A1

公开(公告)日：2022-09-15

申请号：US17828727

申请日：2022-05-31

Applicant: Seagate Technology LLC

Inventor： Xiong LIU ,  WenXiang XIE

IPC: G06F3/06 ,  G11B5/596

Abstract: The technology disclosed herein pertains to a method for determining expected command completion time (CCT), the method including receiving a plurality of position error signals (PESs) for an HDD over a predetermined time period, determining sigma of the plurality of PESs, retrieving upper off-track limits (UOL) for one or more data sectors of the HDD, calculating average number of retrieved sectors (A) between two consecutive occurrences of the |PES|>UOL for the HDD, and determining required number of revolutions (CCT) to collect data based on the average number of retrieved data sectors (A) and a total number of requested data sectors (N).

公开(公告)号：US11443826B2

公开(公告)日：2022-09-13

申请号：US16883081

申请日：2020-05-26

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Ludovic Danjean ,  Abdelhakim Alhussien ,  Erich Franz Haratsch

IPC: G11C29/14 ,  G11C29/42 ,  G11C29/52 ,  G06F11/10

Abstract: Systems and methods presented herein provide for testing degradation in a storage device. In one embodiment, a storage controller is operable to test individual portions of a first of the plurality of storage areas of the storage device by: analyzing individual portions of the first storage area; determining that one or more of the individual portions of the first storage area have failed; and retire the failed one or more portions of the first storage area. The storage controller is further operable to write to the first storage area using an error correction code (ECC), and to test the remaining portions of the first storage area to determine whether the first storage area should be retired in response to writing to the first storage area.

公开(公告)号：US11443765B2

公开(公告)日：2022-09-13

申请号：US17221945

申请日：2021-04-05

Applicant: Seagate Technology LLC

Inventor： Reyad Mehfuz ,  Aidan Dominic Goggin ,  Pierre Asselin ,  Christopher Neil Harvey

IPC: G11B5/48 ,  G11B5/31 ,  G11B5/60 ,  G02B6/122 ,  G11B5/00

Abstract: A write head includes an input coupler configured to receive light excited by a light source. A waveguide core is configured to receive light from the input coupler at a fundamental transverse electric (TE00) mode. The waveguide core has a first straight portion. The waveguide core has a mode converter portion comprising a branched portion extending from the first straight portion. The mode converter portion is configured to convert the light to a higher-order (TE10) mode, the mode converter portion spaced apart from the input coupler. The waveguide core has a second straight portion between the mode converter portion and a media-facing surface. The write head has a near-field transducer at the media-facing surface, the near-field transducer receiving the light at the TE10 mode from the waveguide and directing surface plasmons to a recording medium in response thereto.

公开(公告)号：US11443764B1

公开(公告)日：2022-09-13

申请号：US16291491

申请日：2019-03-04

Applicant: Seagate Technology LLC

Inventor： Choon How Gan ,  Mark Anthony Gubbins ,  Beverley Rutherford McConnell ,  Martin Peter McCurry ,  Michael James Hardy ,  Andres David Barbosa Neira ,  Fadi El Hallak ,  Anil Kumar Puri

IPC: G11B5/48 ,  G11B5/31 ,  G02B6/122 ,  G11B13/08 ,  G11B5/00

Abstract: An apparatus includes a slider configured for heat-assisted magnetic recording. The slider includes an input coupler configured to receive light excited by a light source. The slider includes a waveguide core tapering along a light propagation direction from a first cross-sectional width to a second cross-sectional width, the waveguide configured to provide a surface plasmon-enhanced near-field radiation pattern proximate an output end in response to the received light. One or more cladding layers surround the waveguide core. At least one strip of plasmonic material is disposed between the waveguide core and at least one of the one or more cladding layers.

公开(公告)号：US20220286282A1

公开(公告)日：2022-09-08

申请号：US17189927

申请日：2021-03-02

Applicant: Seagate Technology LLC

Inventor： Hamza Jeljeli ,  Kian Beng Lim ,  Saravanan Nagarajan

IPC: H04L9/08

Abstract: A method of rotating a set of keys, having a media encryption key (MEK) and a current media encryption key encryption key (MEKEK) encrypted and stored in a self-encrypting drive (SED) having data encrypted with the MEK (MEK(data)), includes decrypting the stored MEK and the current MEKEK. A new MEK (MEK′) and a new MEKEK (MEKEK′) are generated. The MEKEK′ is encrypted to replace the current encrypted MEKEK. A concatenation of the MEK and the MEK′ is encrypted with MEKEK′. The encrypted data MEK(data) is re-encrypted with MEK′.

公开(公告)号：US11425164B2

公开(公告)日：2022-08-23

申请号：US17006394

申请日：2020-08-28

Applicant: Seagate Technology LLC

Inventor： Yasaman Keshtkarjahromi

IPC: H04L9/40 ,  G06F21/64

Abstract: Distributed storage of a file in edge storage devices that is resilient to eavesdropping adversaries and Byzantine adversaries. Approaches include a cost-efficient approach in which an authorized user has access to the content of all edge storage nodes. In this approach, key blocks and file blocks that are masked with key blocks are saved in the edge storage nodes. Additionally, redundant data for purposes of error correction are also stored. In turn, upon retrieval of all blocks, errors introduced by a Byzantine adversary may be corrected. In a loss resilient approach, redundant data is stored along with masked file partitions. Upon retrieval of blocks from the edge storage nodes, a unique approach to solving for the unknown file partition values is applied with identification of corrupt nodes based on an average residual error value for each storage node.

公开(公告)号：US11423928B1

公开(公告)日：2022-08-23

申请号：US16252167

申请日：2019-01-18

Applicant: Seagate Technology LLC

Inventor： Michael Christopher Kautzky ,  Tong Zhao ,  Li Wan ,  Xiaolu Kou

IPC: G11B5/31 ,  G11B5/105 ,  G11B5/84 ,  G11B5/127 ,  G11B7/124 ,  C30B25/04 ,  H01L33/00 ,  G11B5/60 ,  G11B5/00

Abstract: A method includes forming a single-crystal-like metal layer on a metal seed layer, the metal seed layer formed on a sacrificial wafer. An anchor layer is formed on the single-crystal-like metal layer. The single-crystal-like metal layer is separated from the sacrificial wafer via the anchor layer. The single-crystal-like metal layer is transported via the anchor layer to a target substrate having one or more recording head subassemblies. The single-crystal-like metal layer is joined with the recording head, the single-crystal-like metal layer being integrated with the recording head as a near-field transducer.