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    Systems and methods for improving find last good page processing in memory devices
    1.
    发明授权
    Systems and methods for improving find last good page processing in memory devices 有权

    公开(公告)号：US12124704B2

    公开(公告)日：2024-10-22

    申请号：US18356693

    申请日：2023-07-21

    申请人： Western Digital Technologies, Inc.

    发明人： Asaf Gueta ,  Arie Star ,  Omer Fainzilber ,  Eran Sharon

    IPC分类号： G06F3/06

    CPC分类号： G06F3/0614 ,  G06F3/064 ,  G06F3/0679

    摘要： A storage device includes a memory die and a controller. The controller identifies a dirty block that was subject to an interrupted I/O operation and performs a coarse inspection of the dirty block. Each iteration of the coarse inspection includes: requesting first bytes of a current page of the dirty block; receiving contents of the first bytes from the at least one memory die; and evaluating a state of the current page based on the contents of the first bytes. The controller also determines an initial last good page based on the coarse inspection and performs a fine inspection of at least one page based on a second number of bytes greater than the first number of bytes. The fine inspection validates the initial last good page and identifies the initial last good page as an actual last good page of the dirty block.

    DRAM-less SSD with HMB cache management
    2.
    发明授权
    DRAM-less SSD with HMB cache management 有权

    公开(公告)号：US12118242B2

    公开(公告)日：2024-10-15

    申请号：US17657456

    申请日：2022-03-31

    申请人： Western Digital Technologies, Inc.

    发明人： Judah Gamliel Hahn ,  Shay Benisty ,  Ariel Navon

    IPC分类号： G06F3/06

    CPC分类号： G06F3/0659 ,  G06F3/0604 ,  G06F3/0656 ,  G06F3/0679

    摘要： The present disclosure generally relates to host memory buffer (HMB) cache management in DRAM-less SSDs. HMB is transient memory and may not always be available. For example, when the link between the data storage device and the host device is not active, the data storage device can't access the HMB. Placing an HMB log in the HMB controller that is disposed in the data storage device provides access to data that would otherwise be inaccessible in the HMB. The HMB log contains any deltas that have occurred since either the last copying to an HMB cache in the memory device or any delta that have occurred since the link became inactive. The HMB cache mirrors the HMB. In so doing, the data of the HMB is available to the data storage device not only when the link is active, but also when the link is not active.

    Self-aligning heat fins for thermal management
    4.
    发明授权
    Self-aligning heat fins for thermal management 有权

    公开(公告)号：US12108577B2

    公开(公告)日：2024-10-01

    申请号：US17743184

    申请日：2022-05-12

    申请人： Western Digital Technologies, Inc.

    发明人： Uthayarajan A/L Rasalingam ,  Vijay A/L Mohanarao

    IPC分类号： H05K7/20

    CPC分类号： H05K7/20509 ,  H05K7/20 ,  H05K7/20009 ,  H05K7/20418 ,  H05K7/205

    摘要： A thermal dissipation device for use with electronic assemblies or devices and that includes a heat conductive plate configured to thermally couple to one or more packaged components on a first side of the heat conductive plate. The thermal dissipation device further includes a heat conductive post coupled to a second side of the heat conductive plate. The heat conductive post includes a fin member rotatably coupled to the heat conductive post, which is configured to rotate about an axis of the heat conductive post to maximize both a flow of air across the fin member and thermal dissipation of heat from the heat conductive plate into the atmosphere.

    Parallel fragmented SGL fetching for hiding host turnaround time
    5.
    发明授权
    Parallel fragmented SGL fetching for hiding host turnaround time 有权

    公开(公告)号：US12105990B2

    公开(公告)日：2024-10-01

    申请号：US17943767

    申请日：2022-09-13

    申请人： Western Digital Technologies, Inc.

    发明人： Shay Benisty

    IPC分类号： G06F3/06

    CPC分类号： G06F3/0659 ,  G06F3/0613 ,  G06F3/0652 ,  G06F3/0673

    摘要： The present disclosure generally relates to reducing latency when fetching Scatter Gather Lists (SGL). Rather than fetching the required SGLs sequentially regardless of what SGL descriptor is needed, the data storage device fetches all of the last entries of each SGL segment in ahead of time after receiving the command, but before the read data is available. The data storage device will still fetch the previous entries in the segment. Once the last entries are fetched, the last entries are stored in a table where the earlier descriptors of each segment are stored as the segments are fetched. In so doing, parallel fetching allows the data storage device to fetch SGL descriptors as needed and reduces the latency.

    Systems and methods of compensating degradation in analog compute-in-memory (ACIM) modules
    6.
    发明授权
    Systems and methods of compensating degradation in analog compute-in-memory (ACIM) modules 有权

    公开(公告)号：US12086461B2

    公开(公告)日：2024-09-10

    申请号：US17347472

    申请日：2021-06-14

    申请人： Western Digital Technologies, Inc.

    发明人： Chao Sun ,  Tung Thanh Hoang ,  Dejan Vucinic

    IPC分类号： G06F3/06 ,  G06N20/00

    CPC分类号： G06F3/0659 ,  G06F3/0616 ,  G06F3/0673 ,  G06N20/00

    摘要： Certain aspects of the present disclosure provide techniques for performing compute in memory (CIM) computations. A device comprises a CIM module configured to apply analog weights to input data using multiply-accumulate operations to generate an output. The device further comprises a digital weight storage unit configured to store digital weight references, wherein a digital weight reference corresponds to an analog weight of the analog weights. The device also comprises a device controller configured to program the analog weights to the CIM module, cause the CIM module to process the input data, and reprogram one or more analog weights that are degraded. The digital weight references in the digital weight storage unit are populated with values from a host processing device. Degraded analog weights in the CIM module are reprogrammed based on the corresponding digital weight references from the digital weight storage unit without reference to the host processing device.

    Data storage device encryption
    10.
    发明授权
    Data storage device encryption 有权

    公开(公告)号：US12058259B2

    公开(公告)日：2024-08-06

    申请号：US17218179

    申请日：2021-03-31

    申请人： Western Digital Technologies, Inc.

    发明人： Matthew Harris Klapman

    IPC分类号： H04L9/06 ,  G06F3/06 ,  G06F16/14 ,  G06F21/79 ,  H04L9/08 ,  H04L9/16

    CPC分类号： H04L9/16 ,  G06F3/0604 ,  G06F3/064 ,  G06F3/0679 ,  G06F16/148 ,  G06F21/79 ,  H04L9/0894 ,  G06F2221/2107

    摘要： This disclosure relates to data storage device (DSD) hardware and, more specifically, to systems and methods for encrypting data stored on a DSD. A DSD comprises a non-volatile storage medium to store multiple file system data objects using block addressing. The multiple file system data objects are addressable by respective ranges of blocks. A device controller is integrated with the DSD and comprises hardware circuitry configured to encrypt data to be stored on the storage medium and decrypt data stored on the storage medium based on different cryptographic keys, and to use each of the different cryptographic keys for one of the ranges of blocks addressing a respective file system data object. The decryption part of the hardware circuitry can be deactivated so that the data can be read in encrypted form.