Patents by Inventor Grishma Shah

Grishma Shah 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).

  • Publication number: 20240094919
    Abstract: Aspects of a storage device including a memory and a controller are provided, which allow for error detection or data integrity checking during data transfer of write operations and read operations. The controller may be configured to generate data integrity information based on at least one data byte to be written to the memory, and to transfer the at least one data byte contemporaneously with the data integrity information on separate data paths to the memory. The controller may be configured to select between transferring data bus inversion information or the data integrity information based on whether a data integrity protection mode is active between the memory and the controller. The memory may be configured to receive the at least one data byte and the data integrity information from the controller, and detect whether an error exists in the at least one data byte based on the data integrity information.
    Type: Application
    Filed: September 20, 2022
    Publication date: March 21, 2024
    Inventors: Julian VLAIKO, Siddhesh DARNE, Hanan BORUKHOV, Venky RAMACHANDRA, Grishma SHAH, Dmitry VAYSMAN
  • Patent number: 11789612
    Abstract: For a non-volatile memory system with a multi-plane memory die having a large block size, to be able to more readily accommodate zone-based host data using zones that are of a smaller size that the block size on the memory, the memory system assigns data from different zones to different subsets of the planes of a common memory die. The memory system is configured to accumulate the data from the different zones into different write queues and then assemble the data from the different write zones into pages or partial pages of data that can be simultaneously programmed into memory cells connected to different word lines that are in different sub-blocks of different blocks in the corresponding assigned planes of the die.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: October 17, 2023
    Assignee: SanDisk Technologies LLC
    Inventors: Karin Inbar, Sahil Sharma, Grishma Shah
  • Patent number: 11763905
    Abstract: Upon detecting power loss during the process of programming multi-level cell (MLC) memory in a storage system, the storage system takes steps to prevent data loss. In one example, the controller sends a graceful shutdown command to the memory, in response to which the memory aborts the ongoing programming operation and stores data from data latches associated with unprogrammed memory cells in single-level cell (SLC) memory. The memory can also store data from programmed memory cells in the SLC memory. The data to be programmed in the MLC memory can be reconstructed prior to powering down the storage system or after the storage system is powered back up. The reconstructed data can then be programmed in the MLC memory.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: September 19, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Grishma Shah, Sergey Anatolievich Gorobets, Daniel Tuers
  • Patent number: 11755211
    Abstract: A data storage device including, in one implementation, a NAND memory and a controller. The NAND memory includes a read/write circuit configured to determine and store initial physical column addresses for each plane included in the NAND memory. The controller is configured to send a read-transfer command and a one-byte address to the NAND memory. The read/write circuit is also configured to retrieve a first initial physical column address from the initial physical column addresses stored in the NAND memory after the NAND memory receives the one-byte address from the controller. The first initial physical column address is associated with a die address and a plane address included in the one-byte address. The read/write circuit is further configured to retrieve a first set of data stored at the first initial physical column address. The read/write circuit is also configured to output the first set of data to the controller.
    Type: Grant
    Filed: October 3, 2022
    Date of Patent: September 12, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Grishma Shah, Daniel Tuers, Sahil Sharma, Hua-Ling Cynthia Hsu, Yenlung Li, Min Peng
  • Publication number: 20230197176
    Abstract: Upon detecting power loss during the process of programming multi-level cell (MLC) memory in a storage system, the storage system takes steps to prevent data loss. In one example, the controller sends a graceful shutdown command to the memory, in response to which the memory aborts the ongoing programming operation and stores data from data latches associated with unprogrammed memory cells in single-level cell (SLC) memory. The memory can also store data from programmed memory cells in the SLC memory. The data to be programmed in the MLC memory can be reconstructed prior to powering down the storage system or after the storage system is powered back up. The reconstructed data can then be programmed in the MLC memory.
    Type: Application
    Filed: December 16, 2021
    Publication date: June 22, 2023
    Applicant: Western Digital Technologies, Inc.
    Inventors: Grishma Shah, Sergey Anatolievich Gorobets, Daniel Tuers
  • Publication number: 20230022998
    Abstract: A data storage device including, in one implementation, a NAND memory and a controller. The NAND memory includes a read/write circuit configured to determine and store initial physical column addresses for each plane included in the NAND memory. The controller is configured to send a read-transfer command and a one-byte address to the NAND memory. The read/write circuit is also configured to retrieve a first initial physical column address from the initial physical column addresses stored in the NAND memory after the NAND memory receives the one-byte address from the controller. The first initial physical column address is associated with a die address and a plane address included in the one-byte address. The read/write circuit is further configured to retrieve a first set of data stored at the first initial physical column address. The read/write circuit is also configured to output the first set of data to the controller.
    Type: Application
    Filed: October 3, 2022
    Publication date: January 26, 2023
    Inventors: Grishma Shah, Daniel Tuers, Sahil Sharma, Hua-Ling Cynthia Hsu, Yenlung Li, Min Peng
  • Patent number: 11487446
    Abstract: A data storage device including, in one implementation, a NAND memory and a controller. The NAND memory includes a read/write circuit configured to determine and store initial physical column addresses for each plane included in the NAND memory. The controller is configured to send a read-transfer command and a one-byte address to the NAND memory. The read/write circuit is also configured to retrieve a first initial physical column address from the initial physical column addresses stored in the NAND memory after the NAND memory receives the one-byte address from the controller. The first initial physical column address is associated with a die address and a plane address included in the one-byte address. The read/write circuit is further configured to retrieve a first set of data stored at the first initial physical column address. The read/write circuit is also configured to output the first set of data to the controller.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: November 1, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Grishma Shah, Daniel Tuers, Sahil Sharma, Hua-Ling Cynthia Hsu, Yenlung Li, Min Peng
  • Publication number: 20220179568
    Abstract: A data storage device including, in one implementation, a NAND memory and a controller. The NAND memory includes a read/write circuit configured to determine and store initial physical column addresses for each plane included in the NAND memory. The controller is configured to send a read-transfer command and a one-byte address to the NAND memory. The read/write circuit is also configured to retrieve a first initial physical column address from the initial physical column addresses stored in the NAND memory after the NAND memory receives the one-byte address from the controller. The first initial physical column address is associated with a die address and a plane address included in the one-byte address. The read/write circuit is further configured to retrieve a first set of data stored at the first initial physical column address. The read/write circuit is also configured to output the first set of data to the controller.
    Type: Application
    Filed: February 12, 2021
    Publication date: June 9, 2022
    Inventors: Grishma Shah, Daniel Tuers, Sahil Sharma, Hua-Ling Cynthia Hsu, Yenlung Li, Min Peng
  • Patent number: 11334251
    Abstract: The present disclosure generally relates to thermal throttling a nonvolatile memory device in a data storage device. Nonvolatile memory devices can sustain higher temperatures for a limited duration of time as part of the lifecycle/operation of the device. By allowing for a small margin of time at a higher temperature of operation, the maximum capability of the data storage device is increased. In so doing, the data storage device reliability can be maintained while increasing the device performance.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: May 17, 2022
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Dmitry Vaysman, Eran Erez, Daniel Edward Tuers, Grishma Shah, Eakta Anchila, Man Lung Mui
  • Publication number: 20210389879
    Abstract: For a non-volatile memory system with a multi-plane memory die having a large block size, to be able to more readily accommodate zone-based host data using zones that are of a smaller size that the block size on the memory, the memory system assigns data from different zones to different subsets of the planes of a common memory die. The memory system is configured to accumulate the data from the different zones into different write queues and then assemble the data from the different write zones into pages or partial pages of data that can be simultaneously programmed into memory cells connected to different word lines that are in different sub-blocks of different blocks in the corresponding assigned planes of the die.
    Type: Application
    Filed: June 16, 2020
    Publication date: December 16, 2021
    Applicant: SanDisk Technologies LLC
    Inventors: Karin Inbar, Sahil Sharma, Grishma Shah
  • Patent number: 11016545
    Abstract: The present disclosure discloses a memory device including a control system for thermal throttling. The control system acquires the temperature of a non-volatile memory element from a temperature detector at a first frequency. Upon determining that the temperature of the non-volatile memory element is above a pre-determined threshold, the control system acquires the temperature of the non-volatile memory element from the temperature detector at a second frequency that is higher than the first frequency and activates the thermal throttling for the non-volatile memory element.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: May 25, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Nian Niles Yang, Dmitry Vaysman, Eran Erez, Grishma Shah
  • Publication number: 20210141539
    Abstract: The present disclosure generally relates to thermal throttling a nonvolatile memory device in a data storage device. Nonvolatile memory devices can sustain higher temperatures for a limited duration of time as part of the lifecycle/operation of the device. By allowing for a small margin of time at a higher temperature of operation, the maximum capability of the data storage device is increased. In so doing, the data storage device reliability can be maintained while increasing the device performance.
    Type: Application
    Filed: June 29, 2020
    Publication date: May 13, 2021
    Inventors: Dmitry VAYSMAN, Eran EREZ, Daniel Edward TUERS, Grishma SHAH, Eakta ANCHILA, Man Lung MUI
  • Patent number: 10732847
    Abstract: A non-volatile memory system may include a non-volatile memory die storing a requested data set that a host requests to be read. In response to the host request, a copy of a data set may be retrieved from the non-volatile memory die without performing error correction on an entry identifying a physical address where the data set is stored. If the data set copy matches the requested data set, the data set copy may be sent to the host. If the data set copy does not match the requested data set, then error correction may be performed on a copy of the entry to identify the correct physical address where the requested data set is stored. A copy of the requested data set may then be retrieved and sent to the host.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: August 4, 2020
    Assignee: SanDisk Technologies LLC
    Inventors: Alexander Bazarsky, Grishma Shah, Idan Alrod, Eran Sharon
  • Patent number: 10706936
    Abstract: In one embodiment, there is a system comprising a first group of blocks connected to a first address line, a second group of blocks connected to a second address line separate and distinct from the first address line, a host controller (or memory device) configured to: allocate a single open block to each of: the first group of blocks connected to the first address line that transmits an address signal generated by a first peripheral circuitry module, and the second group of blocks connected to the second address line that transmits an address signal generated by a second peripheral circuitry module; in response to receiving a first program request: program the open block in the first group of blocks connected to the first address line in response to a first program request in response to receiving a second program request separate and distinct from the first program request: forego programming any of the blocks in the first group of blocks connected to the first address line; and program one of the blocks in
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: July 7, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Rohit Sehgal, Grishma Shah, Sahil Sharma, Phil Reusswig
  • Patent number: 10381097
    Abstract: Apparatuses, systems, methods, and computer program products are disclosed for performing read mode tuning. An apparatus includes an error rate storage circuit that determines error rate information. An apparatus includes a mode selection circuit that determines a read mode of a plurality of read modes for reading a set of memory cells based on error rate information. The plurality of read modes may include a fast read mode and a normal read mode. An apparatus includes a read circuit that performs a read on a set of memory cells based on a read mode.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: August 13, 2019
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Nian Niles Yang, Grishma Shah, Philip David Reusswig, Zhenlei Shen
  • Patent number: 10379754
    Abstract: A device includes a memory device and a controller. The controller is coupled to the memory device. The controller is configured to, in response to receiving a request to perform a memory access at the memory device, determine that the memory device has a characteristic indicative of a temperature crossing. The controller is also configured to, in response to determining that the memory device has the characteristic indicative of the temperature crossing, determine that the memory device satisfies an availability criterion. The controller is further configured to, in response to determining that the memory device satisfies the availability criterion, increase a temperature of the memory device by performing memory operations on the memory device until detecting a condition related to the temperature.
    Type: Grant
    Filed: January 20, 2018
    Date of Patent: August 13, 2019
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Philip David Reusswig, Nian Niles Yang, Grishma Shah, Deepak Raghu, Preeti Yadav, Prasanna Desai Sudhir Rao, Smita Aggarwal, Dana Lee
  • Publication number: 20190214087
    Abstract: A non-volatile memory system implements the writing of data by decoupling the write transfer and the write operation. One embodiment includes setting up a write operation for a first memory die to write to a first address and performing a data transfer to the first memory die for the write operation in response to the determining that sufficient resources exist to perform a data transfer. The first memory die is subsequently released from the write operation without the first memory die writing the transferred data so that the first memory die is in an idle state. In response to determining that sufficient resources exist to perform the write operation, the first memory die is instructed to write the transferred data to the first address in non-volatile memory on the first memory die without re-transferring the data.
    Type: Application
    Filed: January 9, 2018
    Publication date: July 11, 2019
    Applicant: Western Digital Technologies, Inc.
    Inventors: Yoav Weinberg, Grishma Shah
  • Patent number: 10347315
    Abstract: Apparatuses, systems, methods, and computer program products are disclosed for performing a group read refresh. An apparatus includes a plurality of memory groups. An apparatus includes an operation circuit that performs an operation on a selected memory group of a plurality of memory groups. An apparatus includes a remediation circuit that performs a countermeasure operation on an unselected memory group of a plurality of memory groups in response to an operation on a selected memory group.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: July 9, 2019
    Assignee: SanDisk Technologies LLC
    Inventors: Philip David Reusswig, Grishma Shah, Nian Niles Yang
  • Patent number: 10339000
    Abstract: A storage system and method for reducing XOR recovery time are provided. In one embodiment, a storage system is provides comprising a memory and a controller. The controller is configured to generate a first exclusive-or (XOR) parity for pages of data written to the memory; after the first XOR parity has been generated, determine that there is at least one page of invalid data in the pages of data written to the memory; and generate a second XOR parity for the pages of data that excludes the at least one page of invalid data, wherein the second XOR parity is generated by performing an XOR operation using the first XOR parity and the at least one page of invalid data as inputs. Other embodiments are possible, and each of the embodiments can be used alone or together in combination.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: July 2, 2019
    Assignee: SanDisk Technologies LLC
    Inventors: Nian Niles Yang, Grishma Shah, Philip Reusswig
  • Publication number: 20190163367
    Abstract: A non-volatile memory system may include a non-volatile memory die storing a requested data set that a host requests to be read. In response to the host request, a copy of a data set may be retrieved from the non-volatile memory die without performing error correction on an entry identifying a physical address where the data set is stored. If the data set copy matches the requested data set, the data set copy may be sent to the host. If the data set copy does not match the requested data set, then error correction may be performed on a copy of the entry to identify the correct physical address where the requested data set is stored. A copy of the requested data set may then be retrieved and sent to the host.
    Type: Application
    Filed: January 30, 2019
    Publication date: May 30, 2019
    Applicant: SanDisk Technologies LLC
    Inventors: Alexander Bazarsky, Grishma Shah, Idan Alrod, Eran Sharon