公开(公告)号：US20220317886A1

公开(公告)日：2022-10-06

申请号：US17301433

申请日：2021-04-02

Applicant: Seagate Technology LLC

Inventor： Chee Hou Peng ,  Ajay Narayan Kulkarni ,  Harry Tiotantra ,  KayHee Tang ,  WenXiang Xie

IPC: G06F3/06

Abstract: A data storage device can have one or more rotating data media with data tracks that are radially disposed from a central spindle. The data tracks may be logically divided into multiple regions while a write strategy is generated with a region module to set a sequence of different regions for future data writes. Receipt of a data write request to the data storage media from a host can prompt the region module to classify the data write request as a sequential or random write in order to intelligently select a region to satisfy the data write request based on the write strategy to maximize data writing consistency for data associated with the data write request.

公开(公告)号：US11455402B2

公开(公告)日：2022-09-27

申请号：US16261960

申请日：2019-01-30

Applicant: Seagate Technology LLC

Inventor： Jon D. Trantham

IPC: G06F21/60 ,  G06F3/06

Abstract: Apparatus and method for selective overwrite protection of data stored in a non-volatile memory (NVM) with fine precision. In some embodiments, a write command is received from a host device to write one or more blocks of data having associated logical addresses to the NVM. A read operation is performed in response to the write command to read a tag value associated with each block. The write command is disallowed in response to the tag value indicating a protected version of the block having the associated logical address is already stored at the selected location. The tag value may be a key version value indicative of a version of an encryption key used to encrypt user data in the data block and whether the block is write-protected.

公开(公告)号：US11450341B1

公开(公告)日：2022-09-20

申请号：US17407652

申请日：2021-08-20

Applicant: Seagate Technology LLC

Inventor： Xiong Liu ,  Quan Li

IPC: G11B5/09 ,  G11B20/10 ,  G11B5/39 ,  G11B5/00

Abstract: An apparatus comprises a write pole for writing data to a magnetic recording medium and a near-field transducer (NFT) optically coupled to a laser source and configured to produce a thermal spot on the medium. A laser driver applies laser operation power (Iop) to the laser source. A channel circuit generates symbols having a length of nT, where T is a channel clock rate and n is an integer. The laser driver applies Iop to the laser source and a write driver applies bi-directional write currents to the write pole to record the symbols at a location of the thermal spot on the medium, wherein a duration of applying Iop to the laser source by the laser driver is dependent on a length of the symbols and the effective thermal spot size.

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.