Patents by Inventor Daniel L. Helmick

Daniel L. Helmick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11226761
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller and a storage unit divided into a plurality of zones. Each zone comprises a plurality of dies, where each die comprises a plurality of erase blocks. Each erase block comprises a plurality of wordlines. One or more wordlines are grouped together in bins. Each bin is associated with a susceptibility weight, a read count weight, a timer count weight, and a running total weight. A weight counter table is stored in the controller, and tracks the various weights associated with each bin. When a sum of the weights of each bin reaches or exceeds a predetermined value, the controller closes the erase block to avoid an unacceptable quantity of bit error accumulation. The bit error susceptibility of an erase block decreases after the erase block is at capacity or is closed.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: January 18, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Liam Parker, Daniel L. Helmick, Alan D. Bennett, Sergey Anatolievich Gorobets
  • Patent number: 11209989
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller and a media unit. The capacity of the media unit is divided into a plurality of zones. The controller is configured to make informed use of errors by update zone metadata to indicate one or more first logical block addresses were skipped and to indicate the next valid logical block address is available to store data. The controller is further configured to update zone metadata to recommend to the host device to reset one or more full zones, to recommend to the host device to transition one or more open zones to a full state, to alert the host device that one or more open zones have been transitioned to the full state, and to notify the host device of the writeable zone capacity of each of the plurality of zones.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: December 28, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Matias Bjørling, Horst-Christoph Georg Hellwig, David Landsman, Daniel L. Helmick, Liam Parker, Alan D. Bennett, Peter Grayson, Judah Gamliel Hahn
  • Patent number: 11210027
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller and a storage unit divided into a plurality of zones, each zone comprises a plurality of erase blocks. Data is written to an erase block of a zone to a program point that is less than the writeable capacity of the erase block. The data in the erase block is associated with various read weights dependent on the location of the data relative to the program point. Data stored closer to the program point has a higher read weight than data stored closer to the beginning of the erase block. The read weights indicate an error susceptibility of the data. When one or more read commands are received, the read weights of the data being read are accumulated to estimate the bit error accumulation until a predetermined value is reached.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: December 28, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Liam Parker, Daniel L. Helmick
  • Patent number: 11211141
    Abstract: A storage system with several integrated components and method for use therewith are provided. In one embodiment, a storage system comprising: a plurality of non-volatile memory devices; a controller in communication with the plurality of non-volatile memory devices; a plurality of data buffers in communication with the controller and configured to store data sent between the controller and an input/output bus; and a command and address buffer configured to store commands and addresses sent from a host, wherein the command and address buffer is further configured to synchronize data flow into and out of the plurality of data buffer; wherein at least three of the above components are integrated with each other.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: December 28, 2021
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Daniel L. Helmick, Martin V. Lueker-Boden
  • Publication number: 20210397383
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of zones. The controller restricts the host to a maximum number of zones that can be in the open and active state at a time. Open zones can be switched to the closed state, and vice versa, upon a predetermined amount of time expiring. The maximum number of open zones is based on one or more amounts of time to: generate parity data, copy the parity data from the RAM2 to the RAM1, update the parity data, switch a zone from the open and active state to the closed state, and the amount of space in a temporary RAM1 buffer.
    Type: Application
    Filed: September 2, 2021
    Publication date: December 23, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Liam PARKER, Daniel L. HELMICK, Sergey Anatolievich GOROBETS
  • Patent number: 11200003
    Abstract: The present disclosure generally presents a method and apparatus to provide a bounded latency, where a device would report “non-service” of a command at the defined system level timeout or earlier if the device was unable to successfully return the data to the host.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: December 14, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Neil Hutchison, Peter Grayson, Xinde Hu, Daniel L. Helmick, Rodney Brittner
  • Patent number: 11200162
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller, random-access memory (RAM), and a NVM unit, where in the NVM unit comprises a plurality of zones. The RAM unit comprises a logical to physical address (L2P) table for the plurality of zones. The L2P table comprises pointers that are associated with a logical block address (LBA) and the physical location of the data stored in the NVM. The L2P table comprises one pointer per erase block or zone. When a command is received to read data within the NVM, the controller reads the L2P table to determine the LBA and associated pointer of the data. The controller can then determine which zone or erase block the data is stored in, and calculates various offsets of wordlines, pages, and page addresses to find the exact location of the data in the NVM.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: December 14, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Daniel L. Helmick, Liam Parker, Alan D. Bennett, Horst-Christoph Georg Hellwig
  • Patent number: 11200161
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller and a media unit divided into a plurality of zones. Data associated with one or more first commands is written to a first portion of a first zone. Upon a predetermined amount of time passing, dummy data is written to a second portion of the first zone to fill the first zone to a zone capacity. Upon receiving one or more second commands to write data, a second zone is allocated and opened, and the data associated with the one or more second commands is written to a first portion of the second zone. The data associated with the one or more first commands is then optionally re-written to a second portion of the second zone to fill the second zone to a zone capacity, and the first zone is erased.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: December 14, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alan D. Bennett, Liam Parker, Daniel L. Helmick
  • Patent number: 11194494
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of streams. By restricting the host to have a minimum write size, the data transfer speed to RAM2, RAM1, and the storage unit can be optimized. A temporary buffer is utilized within the RAM1 to update parity data for the corresponding commands. The parity data is updated in the RAM1 and written to the RAM2 in the corresponding stream. The parity data may be copied from the RAM2 to the RAM1 to update the parity data in the temporary buffer when commands are received to write data to corresponding streams. As the parity data is updated, the corresponding command is simultaneously written to the corresponding stream.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: December 7, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Sergey Anatolievich Gorobets, Daniel L. Helmick, Peter Grayson
  • Patent number: 11194521
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of streams. The controller restricts the host to a maximum number of streams that can be in the open and active state at a time. Open streams can be switched to the closed state, and vice versa, upon a predetermined amount of time expiring. The maximum number of open streams is based on one or more amounts of time to: generate parity data, copy the parity data from the RAM2 to the RAM1, update the parity data, switch a stream from the open and active state to the closed state, and the amount of space in a temporary RAM1 buffer.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: December 7, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Sergey Anatolievich Gorobets, Daniel L. Helmick, Liam Parker
  • Publication number: 20210374067
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device is comprised of a controller, a random access memory (RAM) unit, and a NVM unit, wherein the NVM unit is comprised of a plurality of zones. The RAM unit comprises a first logical to physical address table and the NVM unit comprises a second logical to physical address table. The zones are partitioned into sections, and each partitioned section aligns with a change log table. Data is written to each zone sequentially, and only one partitioned section is updated at a time for each zone. Each time a zone is erased or written to in the NVM unit, the first logical to physical address table is updated and the second logical to physical address table is periodically updated to match the first logical to physical address table.
    Type: Application
    Filed: May 26, 2020
    Publication date: December 2, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Daniel L. HELMICK, Mark DANCHO, Ryan R. JONES
  • Publication number: 20210373804
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of streams. The controller restricts the host to a maximum number of streams that can be in the open and active state at a time. Open streams can be switched to the closed state, and vice versa, upon a predetermined amount of time expiring. The maximum number of open streams is based on one or more amounts of time to: generate parity data, copy the parity data from the RAM2 to the RAM1, update the parity data, switch a stream from the open and active state to the closed state, and the amount of space in a temporary RAM1 buffer.
    Type: Application
    Filed: May 27, 2020
    Publication date: December 2, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Sergey Anatolievich GOROBETS, Daniel L. HELMICK, Liam PARKER
  • Publication number: 20210373802
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of zones. When a write command is received to write data to a zone, change log data is generated and stored in the RAM1, the previous delta data for the zone is copied from the RAM2 to the RAM1 to be updated with the change log data, and the updated delta data is copied to the RAM2. The delta data stored in the RAM2 is copied to the storage unit periodically. The controller tracks which delta data has been copied to the RAM2 and to the storage unit. During a power failure, the delta data and the change log data are copied from the RAM1 or the RAM2 to the storage unit.
    Type: Application
    Filed: May 26, 2020
    Publication date: December 2, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Daniel L. HELMICK, Peter GRAYSON
  • Publication number: 20210374003
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of zones. A first command to write data to a first zone is received, first XOR data is generated in the RAM1, and the data of the first command is written to the first zone. When a second command to write data to a second zone is received, the generated first XOR data is copied from the RAM1 to the RAM2, and second XOR data for the second zone is copied from the RAM2 to the RAM1. The second XOR data is updated with the second command, and the data of the second command is written to the second zone. The updated second XOR data is copied from the RAM1 to the RAM2.
    Type: Application
    Filed: May 27, 2020
    Publication date: December 2, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Daniel L. HELMICK, Liam PARKER, Alan D. BENNETT, Peter GRAYSON, Sergey Anatolievich GOROBETS
  • Publication number: 20210373769
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of streams. When a write command is received to write data to a stream, change log data is generated and stored in the RAM1, the previous delta data for the stream is copied from the RAM2 to the RAM1 to be updated with the change log data, and the updated delta data is copied to the RAM2. The delta data stored in the RAM2 is copied to the storage unit periodically. The controller tracks which delta data has been copied to the RAM2 and to the storage unit. During a power failure, the delta data and the change log data are copied from the RAM1 or the RAM2 to the storage unit.
    Type: Application
    Filed: May 26, 2020
    Publication date: December 2, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Daniel L. HELMICK, Peter GRAYSON
  • Patent number: 11170869
    Abstract: The present disclosure generally relates to storage devices, such as solid state drives. A storage device comprises a controller comprising a controller error correction code (ECC) engine and a storage unit comprising a plurality of dies. Each of the dies comprise a die ECC engine. When user data is received, the controller ECC engine generates first ECC/error detection code (EDC) data. The user data and the first ECC/EDC data is sent to a die for storage as a code word. The die ECC engine generates second ECC/EDC data for the code word in granular portions. The second ECC/EDC data is used to correct bit errors in one or more code words up to a threshold value. When the number of bit errors exceeds the threshold value, the failed code words are sent to the controller ECC engine for correction.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: November 9, 2021
    Assignee: Western Digital Technologies, Inc.
    Inventors: Daniel L. Helmick, Gerrit Jan Hemink
  • Publication number: 20210334032
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller and a storage unit divided into a plurality of zones. Each zone comprises a plurality of dies, where each die comprises a plurality of erase blocks. Each erase block comprises a plurality of wordlines. One or more wordlines are grouped together in bins. Each bin is associated with a susceptibility weight, a read count weight, a timer count weight, and a running total weight. A weight counter table is stored in the controller, and tracks the various weights associated with each bin. When a sum of the weights of each bin reaches or exceeds a predetermined value, the controller closes the erase block to avoid an unacceptable quantity of bit error accumulation. The bit error susceptibility of an erase block decreases after the erase block is at capacity or is closed.
    Type: Application
    Filed: April 24, 2020
    Publication date: October 28, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Liam PARKER, Daniel L. HELMICK, Alan D. BENNETT, Sergey Anatolievich GOROBETS
  • Publication number: 20210334203
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller, random-access memory (RAM), and a NVM unit, where in the NVM unit comprises a plurality of zones. The RAM unit comprises a logical to physical address (L2P) table for the plurality of zones. The L2P table comprises pointers that are associated with a logical block address (LBA) and the physical location of the data stored in the NVM. The L2P table comprises one pointer per erase block or zone. When a command is received to read data within the NVM, the controller reads the L2P table to determine the LBA and associated pointer of the data. The controller can then determine which zone or erase block the data is stored in, and calculates various offsets of wordlines, pages, and page addresses to find the exact location of the data in the NVM.
    Type: Application
    Filed: April 28, 2020
    Publication date: October 28, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Daniel L. HELMICK, Liam PARKER, Alan D. BENNETT, Horst-Christoph Georg HELLWIG
  • Publication number: 20210334041
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller and a storage unit divided into a plurality of zones. The storage unit comprises a plurality of dies, where each die comprises two planes. One erase block from each plane of a die is selected for zone formation. Each erase block comprises a plurality of wordlines. A zone comprises one or two dies dedicated to storing parity data and a plurality of dies dedicated to storing user data. The zone further comprises space devoted for controller metadata. The storage device restricts a host device to send write commands in a minimum write size to increase programming efficiency. The minimum write size equals one wordline from one erase block from each plane of each die in the zone dedicated to storing user data minus the space dedicated to metadata.
    Type: Application
    Filed: April 24, 2020
    Publication date: October 28, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Alan D. BENNETT, Daniel L. HELMICK, Liam PARKER, Sergey Anatolievich GOROBETS, Peter GRAYSON
  • Publication number: 20210333996
    Abstract: The present disclosure generally relates to methods of operating storage devices. The storage device comprises a controller comprising first random access memory (RAM1), second random access memory (RAM2), and a storage unit divided into a plurality of streams. A first command to write data to a first stream is received, first parity data for the first command is generated in the RAM1, and the data of the first command is written to the first stream. When a second command to write data to a second stream is received, the generated first parity data is copied from the RAM1 to a parking section in the storage unit, and second parity data associated with the second stream is copied from the parking section to the RAM1. The second parity data is updated in the RAM1 with the data of the second command and copied to the parking section.
    Type: Application
    Filed: April 24, 2020
    Publication date: October 28, 2021
    Applicant: Western Digital Technologies, Inc.
    Inventors: Sergey Anatolievich GOROBETS, Peter GRAYSON, Daniel L. HELMICK, Liam PARKER