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公开(公告)号：US11900970B2
公开(公告)日：2024-02-13
申请号：US17162218
申请日：2021-01-29
发明人： Jason Bellorado , Marcus Marrow , Zheng Wu
CPC分类号： G11B5/09 , G06F13/385 , H03M1/12 , G11B2005/0013
摘要： Systems and methods are disclosed for magnetoresistive asymmetry compensation using a hybrid analog and digital compensation scheme. In certain embodiments, a method may comprise receiving an analog signal at a continuous-time front end (CTFE) circuit, and performing, via the CTFE circuit, first magnetoresistive asymmetry (MRA) compensation on the analog signal to adjust the dynamic range of the analog signal based on an input range of an analog-to-digital converter (ADC). The method may further comprise converting the analog signal to a digital sample sequence via the ADC, and performing, via a digital MRA compensation circuit, second MRA compensation to correct residual MRA in the digital sample sequence. Offset compensation may also be performed in both the analog and digital domains.
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22.发明授权公开(公告)号：US11900963B2
公开(公告)日：2024-02-13
申请号：US17807248
申请日：2022-06-16
发明人： Yuhang Cheng , Tae-Woo Lee , Michael A Seigler , Yang Wu
CPC分类号： G11B13/08 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B2005/0021
摘要： A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a near-field emitter configured to heat a surface of a magnetic disk, and a hybrid plasmonic disk. The hybrid plasmonic disk comprises a plasmonic region and a thermal region. The plasmonic region comprises a first material or alloy that is a plasmonic material or alloy. The thermal region comprises a second material or alloy that is different than the first material or alloy.
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公开(公告)号：US11899952B2
公开(公告)日：2024-02-13
申请号：US17515021
申请日：2021-10-29
IPC分类号： G06F3/06
CPC分类号： G06F3/0634 , G06F3/0613 , G06F3/0617 , G06F3/0653 , G06F3/0659 , G06F3/0679
摘要： A system can log data access activity to a memory array with a metadata module while the memory array is logically divided into multiple namespaces. A workload can be determined for each namespace by the metadata module and a metadata strategy can be created with the metadata module in view of the respective namespace workloads. A first metadata and second metadata may be generated for respective first and second user-generated data for storage into a first namespace of the multiple namespaces. The first metadata can be compressed with a compression level prescribed by the metadata strategy in response to a detected or predicted workload to the first namespace before the first metadata, second metadata, first user-generated data, and second user-generated data are each stored in the first namespace.
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公开(公告)号：US11893268B2
公开(公告)日：2024-02-06
申请号：US17579061
申请日：2022-01-19
发明人： Brian T. Edgar , Mark A. Gaertner
IPC分类号： G06F3/06
CPC分类号： G06F3/0655 , G06F3/0604 , G06F3/0676
摘要： A method includes calculating, by a data storage device processor, at least one access trajectory from a first disc surface location to at least one second disc surface location at which at least one primary data access operation is to be carried out. The method also includes determining, by the data storage device controller, whether an opportunity to commence at least one secondary data access operation exists along or proximate to the at least one access trajectory from the first disc surface location to the at least one second disc surface location.
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公开(公告)号：US20240035018A1
公开(公告)日：2024-02-01
申请号：US17816215
申请日：2022-07-29
IPC分类号： C12N15/10 , C12N15/113
CPC分类号： C12N15/1031 , C12N15/113 , C12N2310/127 , C12N2330/31 , G11C11/54
摘要： Building DNA strands at a high rate that are suitable for data storage. Methods include using DNAzyme and utilizing libraries of pre-prepared oligos. A system for the DNA strand synthesis includes: a DNA symbol library comprising a number of single strand oligo symbols; a DNA linker library comprising a first set of single strand oligo linkers and a second set of single strand oligo linkers; and a DNAzyme library comprising a number of DNAzymes. An S1 end of a first DNAzyme is adapted to join the S1 end of a symbol and an S2 end of the first DNAzyme is adapted to join an S2 end of a first linker, and an S1 end of a second DNAzyme is adapted to join an S1 end of a second linker and an S2 end of the second DNAzyme is adapted to join an S2 end of the symbol.
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公开(公告)号：US11880568B2
公开(公告)日：2024-01-23
申请号：US17564052
申请日：2021-12-28
发明人： Rajesh Maruti Bhagwat , Nahoosh Hemchandra Mandlik , Niranjan Anant Pol , Hemantkumar Vitthalrao Mane
IPC分类号： G06F3/06
CPC分类号： G06F3/0607 , G06F3/0629 , G06F3/0659 , G06F3/0679
摘要： A dynamically reconfigurable computational storage drive (CSD) that facilitates parallel data management functionality for a plurality of associated memory devices. The CSD includes an FPGA device that is dynamically reconfigurable during operation of the CSD to provide configuration of a storage interface. Specifically, the FPGA device may be dynamically configured to provide one of a plurality of different communication protocols. A physical connector may be remapped to facilitate a communication protocol without reconnecting a memory device or CSD. The CSD may be provided as a rack-mounted device or a storage appliance for dynamic provision of data management functionality to data in a storage system comprising the CSD.
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公开(公告)号：US20240020050A1
公开(公告)日：2024-01-18
申请号：US17864900
申请日：2022-07-14
发明人： Phillip R. Colline , Timothy Ted Walker , Steven Williams , Hemant Vitthalrao Mane , Jason Matthew Feist
IPC分类号： G06F3/06
CPC分类号： G06F3/0656 , G06F3/0659 , G06F3/0622 , G06F3/0679
摘要： Apparatus and method for executing controller memory buffer (CMB) based data transfer commands in a distributed data processing environment. In some embodiments, a storage device having a device controller and a main non-volatile memory (NVM) is coupled to a client device via an interface. The client device respectively issues normal data transfer commands and bypass data transfer commands to the storage device. The normal data transfer commands include read and write commands that result in transfer of data between the NVM and the client device using a normal data path through the storage device. The bypass data transfer commands involve an allocated CMB of the storage device directly controlled and accessed by the client device. In this way, write data are directly placed into the CMB for writing to the NVM, and readback data from the NVM are directly recovered from the CMB by the client device.
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公开(公告)号：US11875826B1
公开(公告)日：2024-01-16
申请号：US18062397
申请日：2022-12-06
发明人： Michael C Kautzky , Venkateswara R Inturi , XiaoYue Phillip Huang , Lance Edward Nevala , Tong Zhao
CPC分类号： G11B5/314 , G11B5/6088 , G11B13/08 , G11B2005/0021
摘要： A heat-assisted magnetic recording head includes a first feature, a second feature, and a bilayer adhesion structure. The first feature includes a first primary metal. The second feature includes an oxide region, and a mixed metal oxide adhesion layer that is adhered to the oxide region and provided on a surface of the second feature. The bilayer adhesion structure includes the mixed metal oxide adhesion layer of the second feature, and a metal adhesion layer. The metal adhesion layer is disposed between and adhered to the first feature and the mixed metal oxide adhesion layer of the second feature. The metal adhesion layer includes a second primary metal that is different than the first primary metal.
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公开(公告)号：US20240013806A1
公开(公告)日：2024-01-11
申请号：US18371146
申请日：2023-09-21
CPC分类号： G11B13/08 , G11B5/4866 , G11B5/6088
摘要： A recording head includes a channel waveguide that delivers light to a media-facing surface. A near-field transducer (NFT) is at an end of the channel waveguide and proximate to the media-facing surface. A laser including an active region has a longitudinal axis corresponding to a propagation direction of the channel waveguide. The active region includes a back facet and a front facet proximate the NFT. The front facet has a surface shape configured to suppress back reflection of the light.
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30.发明公开公开(公告)号：US20230418516A1
公开(公告)日：2023-12-28
申请号：US17848151
申请日：2022-06-23
IPC分类号： G06F3/06
CPC分类号： G06F3/0659 , G06F3/0656 , G06F3/0664 , G06F3/0619 , G06F3/0689
摘要： Apparatus and method for servicing data transfer commands in a computer environment using a selected protocol such as NVMe (Non-Volatile Memory Express). In some embodiments, a secure connection is established between a client device and a bridge device across an interface. A controller of the bridge device presents a unitary namespace as an available memory space to the client device. The controller further communicates with a plurality of downstream target devices to allocate individual namespaces within main memory stores of each of the target devices to form a consolidated namespace to support the unitary namespace presented to the controller. In this way, the bridge device can operate as an NVMe controller with respect to the client device for the unitary namespace, and as a virtual client device to each of the target devices which operate as embedded NVMe controllers for the individual namespaces.
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