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公开(公告)号：US20190378589A1
公开(公告)日：2019-12-12
申请号：US16263640
申请日：2019-01-31
Applicant: Seagate Technology LLC
Inventor： Stephen H. Perlmutter
Abstract: A data storage system can receive a data write request to write data to a physical address of a non-volatile semiconductor memory prior to detecting an error while storing the write data to the physical address. The detected error is corrected with a monitor module connected to the non-volatile semiconductor memory and a counter associated with the physical address is incremented with the monitor module in response to the corrected error. The write data can be subsequently read to a host in response to a data read request.
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公开(公告)号：US11334481B2
公开(公告)日：2022-05-17
申请号：US16947804
申请日：2020-08-18
Applicant: Seagate Technology LLC
Inventor： Stephen H. Perlmutter , Stacey Secatch , Andrew Louder
Abstract: Apparatus and method for managing a non-volatile memory (NVM) such as a flash memory in a solid-state drive (SSD). In some embodiments, the NVM is arranged as a plurality of semiconductor memory dies coupled to a controller circuit using a plurality of channels. The controller circuit divides the plurality of dies into a succession of garbage collection units (GCUs). Each GCU is independently erasable and allocatable for storage of user data. The GCUs are staggered so that each GCU is formed from a different subset of the dies in the NVM. In further embodiments, the dies are arranged into NVM sets in accordance with the NVMe (Non-Volatile Memory Express) specification with each NVM set addressable by a different user for storage of data in a separate set of staggered GCUs.
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公开(公告)号：US12086455B2
公开(公告)日：2024-09-10
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
CPC classification number: G06F3/0655 , G06F3/0604 , G06F3/0679
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：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
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.
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公开(公告)号：US20200379903A1
公开(公告)日：2020-12-03
申请号：US16947804
申请日：2020-08-18
Applicant: Seagate Technology LLC
Inventor： Stephen H. Perlmutter , Stacey Secatch , Andrew Louder
Abstract: Apparatus and method for managing a non-volatile memory (NVM) such as a flash memory in a solid-state drive (SSD). In some embodiments, the NVM is arranged as a plurality of semiconductor memory dies coupled to a controller circuit using a plurality of channels. The controller circuit divides the plurality of dies into a succession of garbage collection units (GCUs). Each GCU is independently erasable and allocatable for storage of user data. The GCUs are staggered so that each GCU is formed from a different subset of the dies in the NVM. In further embodiments, the dies are arranged into NVM sets in accordance with the NVMe (Non-Volatile Memory Express) specification with each NVM set addressable by a different user for storage of data in a separate set of staggered GCUs.
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Patent Agency Ranking
公开(公告)号：US11301376B2
公开(公告)日：2022-04-12
申请号：US16263606
申请日：2019-01-31
Applicant: Seagate Technology LLC
Inventor： Stephen H. Perlmutter , Kyumsung Lee
IPC: G06F12/02
Abstract: A data storage device can be arranged with a semiconductor memory having a plurality of erasure blocks accessed by a controller to store data. An access count for each respective erasure block can be generated to allow a wear range for the semiconductor memory to be computed based on the respective access counts with the controller. A performance impact of the wear range is evaluated with the controller in order to intelligently alter a deterministic window of a first erasure block of the plurality of erasure blocks in response to the performance impact.
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公开(公告)号：US20200004971A1
公开(公告)日：2020-01-02
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：US20200004676A1
公开(公告)日：2020-01-02
申请号：US16022822
申请日：2018-06-29
Applicant: Seagate Technology LLC
Inventor： Stephen H. Perlmutter , Stacey Secatch , Andrew Louder
Abstract: Apparatus and method for managing a non-volatile memory (NVM) such as a flash memory in a solid-state drive (SSD). In some embodiments, the NVM is arranged as a plurality of semiconductor memory dies coupled to a controller circuit using a plurality of channels. The controller circuit divides the plurality of dies into a succession of garbage collection units (GCUs). Each GCU is independently erasable and allocatable for storage of user data. The GCUs are staggered so that each GCU is formed from a different subset of the dies in the NVM. In further embodiments, the dies are arranged into NVM sets in accordance with the NVMe (Non-Volatile Memory Express) specification with each NVM set addressable by a different user for storage of data in a separate set of staggered GCUs.
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公开(公告)号：US11829270B2
公开(公告)日：2023-11-28
申请号：US17516072
申请日：2021-11-01
Applicant: Seagate Technology LLC
Inventor： Stacey Secatch , Stephen H. Perlmutter , Matthew Stoering , Jonathan Henze
CPC classification number: G06F11/2094 , G06F3/0619 , G06F3/0652 , G06F3/0656 , G06F3/0659 , G06F3/0679 , G06F11/1004
Abstract: Apparatus and method for a die kill and recovery sequence for a non-volatile memory (NVM). Data are stored in the NVM as data sets in garbage collection units (GCUs) that span multiple semiconductor dies. A die failure management circuit is configured to detect a die failure event associated with a selected die, and to generate a recovery strategy to accommodate the detected die failure event by selecting recovery actions to be taken in a selected sequence to maintain a current level of data transfer performance with a client device. The selected recovery actions are carried out in the selected sequence to transfer at least a portion of the user data stored in the selected die to a new replacement die, after which the selected die is decommissioned from further use. The NVM may be a flash memory of a solid-state drive (SSD).
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公开(公告)号：US20220138065A1
公开(公告)日：2022-05-05
申请号：US17516072
申请日：2021-11-01
Applicant: Seagate Technology LLC
Inventor： Stacey Secatch , Stephen H. Perlmutter
Abstract: Apparatus and method for a die kill and recovery sequence for a non-volatile memory (NVM). Data are stored in the NVM as data sets in garbage collection units (GCUs) that span multiple semiconductor dies. A die failure management circuit is configured to detect a die failure event associated with a selected die, and to generate a recovery strategy to accommodate the detected die failure event by selecting recovery actions to be taken in a selected sequence to maintain a current level of data transfer performance with a client device. The selected recovery actions are carried out in the selected sequence to transfer at least a portion of the user data stored in the selected die to a new replacement die, after which the selected die is decommissioned from further use. The NVM may be a flash memory of a solid-state drive (SSD).
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