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公开(公告)号：US10817217B2
公开(公告)日：2020-10-27
申请号：US16021751
申请日：2018-06-28
Applicant: Seagate Technology LLC
Inventor： Steven S. Williams , David W. Claude
IPC: G06F3/06
Abstract: A data storage system can divide a semiconductor memory into a plurality of die sets prior to populating a die set queue with data access commands addressed by a remote host and having a first order. A command order strategy generated by a time-to-ready module organizes the data access commands to a second order that populate a channel queue and are executed as directed by the time-to-ready module in the second order.
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22.发明申请公开(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
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.
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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.
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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
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.
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公开(公告)号：US11748277B2
公开(公告)日：2023-09-05
申请号：US16810357
申请日：2020-03-05
Applicant: Seagate Technology LLC
Inventor： Ryan James Goss , David W. Claude , Graham David Ferris , Daniel John Benjamin , Ryan Charles Weidemann
CPC classification number: G06F13/1668 , G06F11/3034 , G06F11/3485 , G06F11/3495 , G06F12/0253 , G06F2212/1044
Abstract: Method and apparatus for enhancing performance of a storage device, such as a solid-state drive (SSD). In some embodiments, the storage device monitors a rate at which client I/O access commands are received from a client to transfer data with a non-volatile memory (NVM) of the storage device. A ratio of background access commands to the client I/O access commands is adjusted to maintain completion rates of the client I/O access commands at a predetermined level. The background access commands transfer data internally with the NVM to prepare the storage device to service the client I/O access commands, and can include internal reads and writes to carry out garbage collection and metadata map updates. The ratio may be adjusted by identifying a workload type subjected to the storage device by the client.
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Patent Agency Ranking
公开(公告)号：US20220180932A1
公开(公告)日：2022-06-09
申请号：US17541973
申请日：2021-12-03
Applicant: Seagate Technology LLC
Inventor： Stacey Secatch , David W. Claude , Jonathan Henze
Abstract: Method and apparatus for managing data in a non-volatile memory (NVM) of a storage device, such as a solid-state drive (SSD). Data are stored to and retrieved from a group of memory cells in the NVM using a controller circuit. The data are retrieved using a first set of read voltages which are applied to the respective memory cells. The first set of read voltages are accumulated into a history distribution, which is evaluated to arrive at a second set of read voltages based upon characteristics of the history distribution. A calibration operation is performed on the memory cells using the second set of read voltages as a starting point. A final, third set of read voltages is obtained during the calibration operation to provide error rate performance at an acceptable level. The third set of read voltages are thereafter used for subsequent read operations.
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公开(公告)号：US20220113898A1
公开(公告)日：2022-04-14
申请号：US17497573
申请日：2021-10-08
Applicant: Seagate Technology LLC
Inventor： Stacey Secatch , David W. Claude , Daniel J. Benjamin , Thomas V. Spencer , Matthew B. Lovell , Steven Williams , Stephen H. Perlmutter
IPC: G06F3/06
Abstract: A data storage system may have a plurality of memory cells located in different data storage devices that are arranged into a plurality of logical namespaces with each logical namespace configured to be sequentially written and entirely erased as a single unit. An asymmetry strategy may be proactively created with the asymmetry module in response to data access activity to the logical namespaces by the asymmetry module. A new mode, as prescribed by the asymmetry strategy, is entered for at least one logical namespace in response to an operational trigger being met. The new mode changes a timing of at least one queued data access request to at least one logical namespace.
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公开(公告)号：US11017098B2
公开(公告)日：2021-05-25
申请号：US16021823
申请日：2018-06-28
Applicant: Seagate Technology LLC
Inventor： Stacey Secatch , Steven S. Williams , David W. Claude , Benjamin J. Scott , Kyumsung Lee , Stephen H. Perlmutter
Abstract: Apparatus and method for managing entropy in a cryptographic processing system, such as but not limited to a solid-state drive (SSD). In some embodiments, a processing device is operated to transfer data between a host device and a non-volatile memory (NVM). In response to the detection of a power down event associated with the processing device, entropy associated with the power down event is collected and stored in a memory. Upon a subsequent reinitialization of the processing device, the entropy is conditioned and used as an input to a cryptographic function to subsequently transfer data between the host device and the NVM. In some embodiments, the entropy is obtained from the state of a hardware timer that provides a monotonically increasing count for timing control. In other embodiments, the entropy is obtained from a RAID buffer used to store data to a die set of the NVM.
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公开(公告)号：US11016679B2
公开(公告)日：2021-05-25
申请号：US16023420
申请日：2018-06-29
Applicant: Seagate Technology LLC
Inventor： Stacey Secatch , David W. Claude
Abstract: A data storage system can arrange semiconductor memory into a plurality of die sets where performance metrics of execution of a first data access command to a first die set and of a second data access command to a second die set are measured. A proactive strategy is generated to maintain consistent data access command execution performance with a quality of service module based on the measured performance metrics and a third data access command is altered, as directed by the proactive strategy, to prevent a predicted non-uniformity of data access command performance between the first die set and the second die set.
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公开(公告)号：US20200004670A1
公开(公告)日：2020-01-02
申请号：US16021166
申请日：2018-06-28
Applicant: Seagate Technology LLC
Inventor： Steven S. Williams , Kyumsung Lee , David W. Claude
IPC: G06F12/02 , G11C16/04 , G11C8/12 , G06F11/14 , H01L25/065
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. A separate set of map data is generated to describe user data blocks stored to each die set. The controller circuit stores the respective sets of map data in the associated die sets so that no die set stores map data associated with a different die set. The die sets may be arranged in accordance with the NVMe (Non-Volatile Memory Express) specification.
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