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    Global Pool of Garbage Collection Units (GCUs) in a Shared Non-Volatile Memory Device
    21.
    发明申请
    Global Pool of Garbage Collection Units (GCUs) in a Shared Non-Volatile Memory Device 审中-公开

    公开(公告)号：US20200004457A1

    公开(公告)日：2020-01-02

    申请号：US16021870

    申请日：2018-06-28

    Applicant: Seagate Technology LLC

    Inventor： David W. Claude ,  Steven S. Williams ,  Stacey Secatch

    IPC: G06F3/06 ,  G06F12/02

    Abstract: Apparatus and method for managing shared resources in a data storage device such as a solid-state drive (SSD). In some embodiments, a non-volatile memory (NVM) has a population of semiconductor memory dies which are divided into die sets for different users. Each die set includes user garbage collection units (GCUs) for storage of user data blocks by the associated user and overprovisioned global GCUs to store user data blocks from the users of the other die sets. When an imbalance condition exists such that the workload traffic level of a first die set exceeds a workload traffic level of a second die set, at least one host I/O command for the first die set is offloaded for servicing using a selected global GCU of the second die set. The offloaded data may be subsequently transferred to the first die set after the imbalance condition is resolved.

    Deterministic Optimization via Performance Tracking in a Data Storage System
    22.
    发明申请
    Deterministic Optimization via Performance Tracking in a Data Storage System 审中-公开

    公开(公告)号：US20200004456A1

    公开(公告)日：2020-01-02

    申请号：US16021782

    申请日：2018-06-28

    Applicant: Seagate Technology LLC

    Inventor： Steven S. Williams ,  Stacey Secatch ,  David W. Claude ,  Kyumsung Lee ,  Benjamin J. Scott

    IPC: G06F3/06

    Abstract: A semiconductor data storage memory can receive data access commands into a queue in a first time sequence that correspond with the transfer of data between a host and portions of the memory. The memory may be divided into separate portions that each have a different owner and the access commands may be issued to each of the respective separate portions. The access commands can subsequently be executed in a different, second time sequence responsive to estimated completion times for each of the access commands based on measured completion times for previously serviced, similar commands to maintain a nominally consistent quality of service level for each of the respective owners.

    Configurable Mapping System in a Non-Volatile Memory
    23.
    发明申请
    Configurable Mapping System in a Non-Volatile Memory 审中-公开

    公开(公告)号：US20200004450A1

    公开(公告)日：2020-01-02

    申请号：US16023199

    申请日：2018-06-29

    Applicant: Seagate Technology LLC

    Inventor： Stacey Secatch ,  David W. Claude ,  Steven S. Williams ,  Jeff Rogers

    IPC: G06F3/06 ,  G06F13/16 ,  G06F13/42

    Abstract: Apparatus and method for managing metadata in a data storage device, such as a solid-state drive (SSD). In some embodiments, a non-volatile memory (NVM) includes a population of semiconductor memory dies. The dies are connected a number of parallel channels such that less than all of the semiconductor dies are connected to each channel. A controller circuit apportions the semiconductor memory dies into a plurality of die sets, with each die set configured to store user data blocks associated with a different user. The controller circuit subsequently rearranges the dies into a different arrangement of die sets so that at least one die is migrated from a first dies set to a second die set. A map manager circuit is configured to establish an array of pointers in a memory to identify contiguous portions of map metadtata that describe user data stored in the at least one migrated die.

    Managing Multiple Namespaces in a Non-Volatile Memory (NVM)
    24.
    发明申请
    Managing Multiple Namespaces in a Non-Volatile Memory (NVM) 审中-公开

    公开(公告)号：US20180349285A1

    公开(公告)日：2018-12-06

    申请号：US15609758

    申请日：2017-05-31

    Applicant: Seagate Technology LLC

    Inventor： Mark Ish ,  Steven S. Williams ,  Jeffrey Munsil

    IPC: G06F12/10

    CPC classification number: G06F12/10 ,  G06F2212/7201

    Abstract: Apparatus and method for managing namespaces in a Non-Volatile Memory Express (NVMe) controller environment. A non-volatile memory (NVM) is arranged to store map units (MUs) as addressable data blocks in one or more namespaces. A forward map has a sequence of map unit address (MUA) entries that correlate each of the MUs with the physical locations in the NVM. The MUA entries are grouped into immediately adjacent, contiguous ranges for each of the namespaces. A base MUA array identifies the address, within the forward map, of the beginning MUA entry for each namespace. A new namespace may be added by appending a new range of the MUA entries to the forward map immediate following the last MUA entry, and by adding a new entry to the base MUA array to identify the address, within the forward map, of the beginning MUA entry for the new namespace.

    Providing additional parity for non-standard sized parity data sets
    25.
    发明授权
    Providing additional parity for non-standard sized parity data sets 有权

    公开(公告)号：US11138069B2

    公开(公告)日：2021-10-05

    申请号：US16212242

    申请日：2018-12-06

    Applicant: Seagate Technology LLC

    Inventor： Stephen H. Perlmutter ,  Steven S. Williams ,  Benjamin J. Scott ,  Andrew J. Louder ,  Kyumsung Lee ,  Robert W. Dixon

    IPC: G06F11/00 ,  G06F11/10 ,  G11C29/52 ,  H03M13/29

    Abstract: Apparatus and method for storing data in a non-volatile memory (NVM), such as a flash memory in a solid-state drive (SSD). In some embodiments, a distributed storage space of the NVM is defined to extend across a plural number of regions of the NVM. A non-standard parity data set is provided having a plural number of data elements greater than or equal to the plural number of regions in the storage space. The data set is written by storing a first portion of the data elements and a first parity value to the plural number of regions and a remaining portion of the data elements and a second parity value to a subset of the plural number of regions. The regions can comprise semiconductor dies in a flash memory, and the distributed storage space can be a garbage collection unit formed using one erasure block from each flash die.

    Global pool of garbage collection units (GCUs) in a shared non-volatile memory device
    26.
    发明授权
    Global pool of garbage collection units (GCUs) in a shared non-volatile memory device 有权

    公开(公告)号：US10552086B2

    公开(公告)日：2020-02-04

    申请号：US16021870

    申请日：2018-06-28

    Applicant: Seagate Technology LLC

    Inventor： David W. Claude ,  Steven S. Williams ,  Stacey Secatch

    IPC: G06F12/00 ,  G06F3/06 ,  G06F12/02

    Abstract: Apparatus and method for managing shared resources in a data storage device such as a solid-state drive (SSD). In some embodiments, a non-volatile memory (NVM) has a population of semiconductor memory dies which are divided into die sets for different users. Each die set includes user garbage collection units (GCUs) for storage of user data blocks by the associated user and overprovisioned global GCUs to store user data blocks from the users of the other die sets. When an imbalance condition exists such that the workload traffic level of a first die set exceeds a workload traffic level of a second die set, at least one host I/O command for the first die set is offloaded for servicing using a selected global GCU of the second die set. The offloaded data may be subsequently transferred to the first die set after the imbalance condition is resolved.

    DUAL GRANULARITY DYNAMIC MAPPING WITH PACKETIZED STORAGE
    27.
    发明申请
    DUAL GRANULARITY DYNAMIC MAPPING WITH PACKETIZED STORAGE 审中-公开

    公开(公告)号：US20190056881A1

    公开(公告)日：2019-02-21

    申请号：US15680657

    申请日：2017-08-18

    Applicant: Seagate Technology LLC

    Inventor： Timothy Richard Feldman ,  Steven S. Williams

    IPC: G06F3/06

    CPC classification number: G06F3/0644 ,  G06F3/0604 ,  G06F3/0608 ,  G06F3/061 ,  G06F3/0631 ,  G06F3/064 ,  G06F3/0661 ,  G06F3/0673 ,  G06F3/0685

    Abstract: A data storage device includes a data store optimized organized into allocation units sized according to an sequential writing unit or garbage collection unit of the data store. Information is written to the allocation units as either coarse or fine-grained packets, which are packets of data that are self-describing and written together. Random writes received from a host to data already written into allocation units is written to another allocation unit, and a coarse-grained forward map is updated to reflect the physical location of the valid data that superseded data in the allocation unit until the allocation unit can be rewritten. Promotion operations are disclosed to compact data and garbage collect data by rewriting allocation units.

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