Patents by Inventor Robert Lercari
Robert Lercari 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).
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Patent number: 11288203Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 3, 2020Date of Patent: March 29, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11275695Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: February 19, 2020Date of Patent: March 15, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11269781Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: February 19, 2020Date of Patent: March 8, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11249652Abstract: This disclosure provides techniques for managing memory which match per-data metrics to those of other data or to memory destination. In one embodiment, wear data is tracked for at least one tier of nonvolatile memory (e.g., flash memory) and a measure of data persistence (e.g., age, write frequency, etc.) is generated or tracked for each data item. Memory wear management based on these individually-generated or tracked metrics is enhanced by storing or migrating data in a manner where persistent data is stored in relatively worn memory locations (e.g., relatively more-worn flash memory) while temporary data is stored in memory that is less worn or is less susceptible to wear. Other data placement or migration techniques are also disclosed.Type: GrantFiled: March 27, 2020Date of Patent: February 15, 2022Assignee: Radian Memory Systems, Inc.Inventors: Andrey V. Kuzmin, Alan Chen, Robert Lercari
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Patent number: 11237978Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 27, 2020Date of Patent: February 1, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11226903Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 3, 2020Date of Patent: January 18, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11221960Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 3, 2020Date of Patent: January 11, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11221959Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 3, 2020Date of Patent: January 11, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11221961Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 27, 2020Date of Patent: January 11, 2022Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11175984Abstract: This disclosure provides a memory controller for asymmetric non-volatile memory, such as flash memory, and related host and memory system architectures. The memory controller is configured to automatically generate and transmit redundancy information to a destination, e.g., a host or another memory drive, to provide for cross-drive redundancy. This redundancy information can be error (EC) information, which is linearly combined with similar information from other drives to create “superparity.” If EC information is lost for one drive, it can be rebuilt by retrieving the superparity, retrieving or newly generating EC information for uncompromised drives, and linearly combining these values. In one embodiment, multiple error correction schemes are use, including a first intra-drive scheme to permit recovery of up to x structure-based failures, and the just-described redundancy scheme, to provide enhanced security for greater than x structure-based failures.Type: GrantFiled: December 9, 2019Date of Patent: November 16, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Craig Robertson, Mike Jadon
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Patent number: 11100006Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: April 6, 2020Date of Patent: August 24, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11086789Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 25, 2021Date of Patent: August 10, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11048643Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: March 3, 2020Date of Patent: June 29, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11023386Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: February 5, 2020Date of Patent: June 1, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11023315Abstract: Processing functions are offloaded to a memory controller for nonvolatile memory by a host in connection with write data. The nonvolatile memory executes these functions, producing processed data that must be written into memory; for example, the offloaded functions can include erasure coding, with the nonvolatile memory controller generating redundancy information that must be written into memory. The memory controller holds this information in internal RAM and then later writes this information into nonvolatile memory according to dynamically determined write time and/or destinations selected by the host, so as to not collide with host data access requests. In one embodiment, the memory is NAND flash memory and the memory controller is a cooperative memory controller that permits the host to schedule concurrent operations in respective, configurable virtual block devices which have been configured by the host out of a pool of structural flash memory structures managed by the memory controller.Type: GrantFiled: October 3, 2019Date of Patent: June 1, 2021Assignee: Radian Memory Systems, Inc.Inventors: Mike Jadon, Craig Robertson, Robert Lercari
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Patent number: 11023387Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: February 5, 2020Date of Patent: June 1, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 11003586Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: February 5, 2020Date of Patent: May 11, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 10996863Abstract: This disclosure provides techniques for managing memory which match per-data metrics to those of other data or to memory destination. In one embodiment, wear data is tracked for at least one tier of nonvolatile memory (e.g., flash memory) and a measure of data persistence (e.g., age, write frequency, etc.) is generated or tracked for each data item. Memory wear management based on these individually-generated or tracked metrics is enhanced by storing or migrating data in a manner where persistent data is stored in relatively worn memory locations (e.g., relatively more-worn flash memory) while temporary data is stored in memory that is less worn or is less susceptible to wear. Other data placement or migration techniques are also disclosed.Type: GrantFiled: March 27, 2020Date of Patent: May 4, 2021Assignee: Radian Memory Systems, Inc.Inventors: Andrey V. Kuzmin, Alan Chen, Robert Lercari
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Patent number: 10977188Abstract: This disclosure provides techniques hierarchical address virtualization within a memory controller and configurable block device allocation. By performing address translation only at select hierarchical levels, a memory controller can be designed to have predictable I/O latency, with brief or otherwise negligible logical-to-physical address translation time. In one embodiment, address transition may be implemented entirely with logical gates and look-up tables of a memory controller integrated circuit, without requiring processor cycles. The disclosed virtualization scheme also provides for flexibility in customizing the configuration of virtual storage devices, to present nearly any desired configuration to a host or client.Type: GrantFiled: February 3, 2020Date of Patent: April 13, 2021Assignee: Radian Memory Systems, Inc.Inventors: Robert Lercari, Alan Chen, Mike Jadon, Craig Robertson, Andrey V. Kuzmin
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Patent number: 10956082Abstract: A host stores “context” metadata for logical block addresses (LBAs) in a manner tied to physical location. Notwithstanding log-structured or copy on write processes, the host is then provided with immediate context when the host is called upon to assist a memory controller with data identified by physical location, for example, for memory reconfiguration, garbage collection, wear leveling or other processes. The metadata for example can provide the host with insight as to which data may be moved to enhance performance optimization and where that data can be placed. In one embodiment, the host writes back one or more references that span multiple layers of indirection in concert with write of the underlying data; in another embodiment, the context can point to other metadata.Type: GrantFiled: December 4, 2019Date of Patent: March 23, 2021Assignee: Radian Memory Systems, Inc.Inventors: Alan Chen, Craig Robertson, Robert Lercari, Andrey V. Kuzmin