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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：US10896002B2
公开(公告)日：2021-01-19
申请号：US16212200
申请日：2018-12-06
Applicant: Seagate Technology LLC
Inventor： Benjamin J. Scott , Steven S. Williams , Stephen H. Perlmutter , Ryan J. Goss , Daniel J. Benjamin
Abstract: Apparatus and method for managing metadata in a data storage device such as a solid-state drive (SSD). In some embodiments, a write stream is formed of user data blocks to be sequentially written to a non-volatile memory (NVM). An entry of a reverse directory footer is generated for each user data block in the write stream to describe a physical address in the NVM at which the corresponding user data block is to be stored. The entries are accumulated in a buffer memory until the total count of entries reaches a predetermined threshold and a complete footer data structure is formed. The complete footer data structure is thereafter inserted into the write stream for writing, with the data blocks, to the NVM. The complete footer data structure has an overall size that corresponds to an overall size of each of the user data blocks.
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公开(公告)号：US20200004674A1
公开(公告)日：2020-01-02
申请号：US16216415
申请日：2018-12-11
Applicant: Seagate Technology LLC
Inventor： Steven S. Williams
Abstract: A semiconductor data storage memory can be arranged with an accumulated list in a memory of background operations to be carried out upon a semiconductor memory formed of one or more non-volatile memory dies. When a deterministic window interval is entered responsive to a request from a host during which data transfers between the host and the semiconductor memory meet a minimum predetermined data transfer rate, the accumulated list is sorted into a first set of the background operations that can be performed during the deterministic window interval while maintaining the minimum predetermined data transfer rate and a remaining second set of the background operations. The first set of the background operations is performed during the deterministic window interval prior to the second set of background operations being performed after a conclusion of the deterministic window interval.
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公开(公告)号：US20200004672A1
公开(公告)日：2020-01-02
申请号：US16023071
申请日：2018-06-29
Applicant: Seagate Technology LLC
Inventor： Benjamin J. Scott , Steven S. Williams
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 to which are connected a number of parallel channel. A controller circuit apportions the semiconductor memory dies into a plurality of die sets each configured to store user data blocks associated with a different user during hot data transfers responsive to a sequence of host access commands. A shared resource is available for use by each of the die sets to support background data transfers not associated with the host access commands, such as a RAID buffer. The controller circuit arbitrates the use of the shared resource by each of the die sets in turn to sequentially perform the background data transfers to maintain a selected level of deterministic performance of the hot data transfers.
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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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Patent Agency Ranking
公开(公告)号：US20200004636A1
公开(公告)日：2020-01-02
申请号：US16023234
申请日：2018-06-29
Applicant: Seagate Technology LLC
Inventor： Stacey Secatch , Steven S. Williams , David W. Claude , Benjamin J. Scott , Kyumsung Lee , Jeff Rogers
Abstract: A data storage system can connect a plurality of remote hosts to a plurality of die sets resident in a semiconductor memory. Execution of at least one data access command addressed by a remote host of the plurality of remote hosts can occur prior to a power interruption event being detected for at least one die set of the plurality of die sets. User-generated data associated with the at least one data access command may then be flushed to a predetermined location responsive to an available resource budget associated with the power interruption event.
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公开(公告)号：US20200004461A1
公开(公告)日：2020-01-02
申请号：US16212200
申请日：2018-12-06
Applicant: Seagate Technology LLC
Inventor： Benjamin J. Scott , Steven S. Williams , Stephen H. Perimutter , Ryan J. Goss , Daniel J. Benjamin
Abstract: Apparatus and method for managing metadata in a data storage device such as a solid-state drive (SSD). In some embodiments, a write stream is formed of user data blocks to be sequentially written to a non-volatile memory (NVM). An entry of a reverse directory footer is generated for each user data block in the write stream to describe a physical address in the NVM at which the corresponding user data block is to be stored. The entries are accumulated in a buffer memory until the total count of entries reaches a predetermined threshold and a complete footer data structure is formed. The complete footer data structure is thereafter inserted into the write stream for writing, with the data blocks, to the NVM. The complete footer data structure has an overall size that corresponds to an overall size of each of the user data blocks.
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公开(公告)号：US20200004455A1
公开(公告)日：2020-01-02
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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公开(公告)号：US11520696B2
公开(公告)日：2022-12-06
申请号：US16021166
申请日：2018-06-28
Applicant: Seagate Technology LLC
Inventor： Steven S. Williams , Kyumsung Lee , David W. Claude
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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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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