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    Combined page footer for parallel metadata storage
    1.
    发明授权
    Combined page footer for parallel metadata storage 有权

    公开(公告)号：US11726921B2

    公开(公告)日：2023-08-15

    申请号：US15929775

    申请日：2020-05-21

    Applicant: Seagate Technology LLC

    Inventor： Ryan James Goss ,  Daniel John Benjamin ,  David W. Claude ,  Graham David Ferris ,  Ryan Charles Weidemann

    IPC: G06F12/1009

    CPC classification number: G06F12/1009 ,  G06F2212/657

    Abstract: Apparatus and method for managing metadata in a data storage device such as a solid-state drive (SSD). The metadata are stored in combined (combo) pages in a non-volatile memory (NVM) each having first and second level map entries. The second level map entries provide a logical-to-physical address translation layer for user data blocks stored to the NVM, and the first level map entries describe the second level map entries in the combo page. A global map structure is accessed to identify a selected combo page in the NVM associated with a pending access command. The first and second level map entries are retrieved from the combo page, and the second level map entries are used to identify a target location for the transfer of user data blocks to or from the NVM.

    STORAGE DEVICE WITH ENHANCED TIME TO READY PERFORMANCE
    2.
    发明申请
    STORAGE DEVICE WITH ENHANCED TIME TO READY PERFORMANCE 有权

    公开(公告)号：US20210182192A1

    公开(公告)日：2021-06-17

    申请号：US16714121

    申请日：2019-12-13

    Applicant: Seagate Technology LLC

    Inventor： Daniel John Benjamin ,  Ryan Charles Weidemann ,  Ryan James Goss ,  David W. Claude ,  Graham David Ferris

    IPC: G06F12/0804 ,  G06F12/02 ,  G06F12/10

    Abstract: Method and apparatus for enhancing power cycle performance of a storage device, such as a solid-state drive (SSD). In some embodiments, map data that describe the contents of a non-volatile memory (NVM) are arranged as snapshots and intervening journal updates. During a scram interval in which the storage device transitions to a powered down condition, the snapshots and journal updates for primary segments with high client interest are updated prior to storage to the NVM. During a reinitialization interval in which the storage device transitions to a powered up condition, the updated primary segments are loaded, after which the storage device provides the client device with an operationally ready notification. Remaining secondary segments are updated and loaded after the notification. The primary segments are identified based on a detected workload from the client device. Configuration changes can further be made based on the detected workload.

    Combining in-process reads to reduce die collisions
    3.
    发明授权
    Combining in-process reads to reduce die collisions 有权

    公开(公告)号：US11106390B1

    公开(公告)日：2021-08-31

    申请号：US15929308

    申请日：2020-04-24

    Applicant: Seagate Technology LLC

    Inventor： Ryan James Goss ,  Daniel John Benjamin ,  David W. Claude ,  Graham David Ferris ,  Ryan Charles Weidemann

    IPC: G06F3/06

    Abstract: Method and apparatus for managing data in a storage device, such as a solid-state drive (SSD). In some embodiments, a first read command from a command queue is forwarded to a non-volatile memory (NVM) to request retrieval of a first set of readback data. While the NVM initiates in-process execution of the first read command, an expanded read command is issued to the NVM. The expanded read command supercedes the first read command and requests an expanded set of readback data that includes the first set of readback data as well as a second set of readback data. The second set of readback data may be associated with a second read command in the command queue. The NVM transfers the expanded set of readback data to a read buffer responsive to the expanded read command. The first and second read commands may be client reads, background reads or both.

    Enhanced garbage collection
    5.
    发明授权
    Enhanced garbage collection 有权

    公开(公告)号：US10739996B1

    公开(公告)日：2020-08-11

    申请号：US15213298

    申请日：2016-07-18

    Applicant: Seagate Technology LLC

    Inventor： David Scott Ebsen ,  Kevin A Gomez ,  Mark Ish ,  Daniel John Benjamin ,  Robert Wayne Moss

    IPC: G06F16/00 ,  G06F3/06 ,  G06F16/17 ,  G06F16/11 ,  G06F16/2455

    Abstract: Systems and methods are disclosed for enhanced garbage collection operations at a memory device. The enhanced garbage collection may include selecting data and blocks to garbage collect to improve device performance. Data may be copied and reorganized according to a data stream via which the data was received, or data and blocks may be evaluated for garbage collection based on other access efficiency metrics. Data may be selected for collection based on sequentiality of the data, host access patterns, or other factors. Processing of host commands may be throttled based on a determined amount of work to garbage collect a plurality of blocks, in order to limit variability in host command throughput over a time period.

    Storage device with enhanced time to ready performance
    6.
    发明授权
    Storage device with enhanced time to ready performance 有权

    公开(公告)号：US11016889B1

    公开(公告)日：2021-05-25

    申请号：US16714121

    申请日：2019-12-13

    Applicant: Seagate Technology LLC

    Inventor： Daniel John Benjamin ,  Ryan Charles Weidemann ,  Ryan James Goss ,  David W. Claude ,  Graham David Ferris

    IPC: G06F3/06 ,  G06F12/0804 ,  G06F12/02 ,  G06F12/10

    Abstract: Method and apparatus for enhancing power cycle performance of a storage device, such as a solid-state drive (SSD). In some embodiments, map data that describe the contents of a non-volatile memory (NVM) are arranged as snapshots and intervening journal updates. During a scram interval in which the storage device transitions to a powered down condition, the snapshots and journal updates for primary segments with high client interest are updated prior to storage to the NVM. During a reinitialization interval in which the storage device transitions to a powered up condition, the updated primary segments are loaded, after which the storage device provides the client device with an operationally ready notification. Remaining secondary segments are updated and loaded after the notification. The primary segments are identified based on a detected workload from the client device. Configuration changes can further be made based on the detected workload.

    Managing overlapping reads and writes in a data cache
    7.
    发明授权
    Managing overlapping reads and writes in a data cache 有权

    公开(公告)号：US11003580B1

    公开(公告)日：2021-05-11

    申请号：US15929407

    申请日：2020-04-30

    Applicant: Seagate TEchnology LLC

    Inventor： Ryan James Goss ,  Daniel John Benjamin ,  David W. Claude ,  Graham David Ferris ,  Ryan Charles Weidemann

    IPC: G06F13/00 ,  G06F12/0804 ,  G06F12/0875

    Abstract: Method and apparatus for managing data in a storage device, such as a solid-state drive (SSD). In some embodiments, write and read commands from a client device are placed into a command queue pending servicing to transfer data between the client device and a non-volatile memory (NVM). A write cache temporarily stores sets of writeback data pending transfer. A cache manager detects an overlap condition in which a subsequently received command at least partially overlaps a pending write command. In response, the cache manager enacts a change in caching policy that includes retention of the cached writeback data to aid in the servicing of the subsequently received command. The changes in caching policy can include an increase in the size of the write cache, delays in the writing of hot writeback data sets, the coalescing of different writeback data sets, cache hits using the cached writeback data, etc.

    Processing map metadata updates to reduce client I/O variability and device time to ready (TTR)
    9.
    发明授权
    Processing map metadata updates to reduce client I/O variability and device time to ready (TTR) 有权

    公开(公告)号：US11132140B1

    公开(公告)日：2021-09-28

    申请号：US15929307

    申请日：2020-04-24

    Applicant: Seagate Technology LLC

    Inventor： Daniel John Benjamin ,  Ryan James Goss

    IPC: G06F3/06

    Abstract: Method and apparatus for enhancing performance of a storage device, such as a solid-state drive (SSD). A non-volatile memory (NVM) stores user data from a client device. Map metadata in a local memory describes locations of the user data in the NVM. The map metadata is arranged as a snapshot and accumulated journal updates. A metadata manager circuit combines a first portion of the journal updates with the existing snapshot to generate a new snapshot, and places a second portion of the journal updates into a read-only journal table in accordance with a selected metadata journaling strategy. A controller uses the updated snapshot and the table to service subsequently received client commands. Only dirty entries are processed and are written at the slowest acceptable rate, thereby improving client I/O performance during normal operation and time to ready (TTR) performance of the device during initialization.

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