Kioxia Corporation

Toshiba Memory Corporation

Toshiba Corporation

Nigel David Horspool

Steve Wells

Steven E Wells

Neil Buxton

Julien Margetts

Mohinder Saluja

Brian Clarke

Paul Suhler

Yaron Klein

Gary James Calder

Jeremy Omar Moore

A method performed by a controller of a solid-state drive (SSD) having an integrated circuit comprising the controller. The method comprises receiving from a host a request for read data stored in a non-volatile semiconductor storage device of the SSD. The method also comprises determining if a capacity of internal memory of the integrated circuit is less than a predetermined fraction of its total capacity. Then the method comprises throttling a read-out rate used by the controller to retrieve data from the non-volatile semiconductor storage device if the capacity of internal memory of the integrated circuit is less than a predetermined fraction of its total capacity. The method then comprises retrieving the read data for storage in the internal memory using the throttled read-out rate.

Throttling NAND read-outs for improved host read performance

Various implementations described herein relate to systems and methods for managing superblocks, including a non-volatile storage including a superblock and a controller configured to notify a host of a size of the superblock to a host, determine a stream that aligns with the superblock, write data corresponding to the stream to the superblock, and determine that writing the data correspond to the stream has completed.

Superblock-based write management in non-volatile memory devices

Various implementations described herein relate to systems and methods for a Solid State Drive (SSD) to manage data in response to a power loss event, including writing data received from a host to a volatile storage of the SSD, detecting the power loss event before the data is written to a non-volatile storage of the SSD, storing the write commands to a non-volatile storage of the SSD, marking at least one storage location of the SSD associated with the write commands as uncorrectable, for example, after the power is restored.

Capacitor energy management for unexpected power loss in datacenter SSD devices

A solid-state drive having an integrated circuit comprising a controller that is configured to determine, for data transferred between a host interface of the integrated circuit and nonvolatile semiconductor storage device interface of the integrated circuit, the availability of an internal buffer of the integrated circuit to transparently accumulate the transferred data, and (i) if the internal buffer is available, accumulate the data from target nonvolatile semiconductor storage devices or the host in the internal buffer, or (ii) if the internal buffer is not available, accumulate the data unit from the target nonvolatile semiconductor storage devices or the host in an external buffer communicatively coupled to the controller, wherein the external buffer is external to the integrated circuit. The controller then provides the accumulated data to the respective interfaces to furnish a read or write request from the host.

Buffer optimization for solid-state drives

A method performed by a controller of an SSD, the controller coupled to a non-volatile semiconductor memory device and comprising a first command queue (Q) and a second command queue (Q). The method comprises selecting from a submission queue at least one command from a host, the command relating to an action to be performed on the memory device. The method comprises determining if a number of in-flight commands received from the host via the submission queue and already present in Qexceeds a threshold. The method comprises adding the selected command to Qif the threshold is exceeded, otherwise adding the selected command to Q. The method comprises processing a first command from Qand a second command from Qto perform a first action and a second action, respectively, on the memory device, the first action being completed in advance of the second action.

Fairshare between multiple SSD submission queues

Various implementations described herein relate to systems and methods for protecting data stored on a Solid State Drive (SSD) against malware, including determining, by a controller of the SSD, a typical traffic profile, receiving, by the controller, commands from a host, and determining, by the controller, that the commands are likely caused by malware by determining that the commands deviate from the typical traffic profile. In response to determining the commands are likely caused by the malware, the controller performs a malware response action.

Systems and methods for protecting SSDs against threats

A mass storage device and method for storing data originally written to a volatile memory with byte level I/O protocol commands to a non-volatile memory using block level I/O protocol commands. The mass storage device includes a host interface for communicating with the host computer system, at least one non-volatile memory, at least one volatile memory, a memory controller configured to accept block level I/O protocol commands from the host computer system to read data from and write data to the non-volatile memory, and additionally accept byte level memory I/O commands from the host computer system for reading data from and writing data to the at least one volatile memory, and means for retrieving the data written by the host computer system using the byte level memory I/O commands from the volatile memory and writing the data retrieved from the volatile memory to the at least one non-volatile memory.

Solid-state mass storage device and method for persisting volatile data to non-volatile media

The operation of a pool of solid state drives is orchestrated to manage garbage collection and wear leveling. Each individual solid state drive is operated in either an Active Mode in which I/O commands are processed or in a Maintenance Mode in which garbage collection is performed and no I/O commands are processed. The selection of solid state drives in the Active Mode is further selected to achieve wear leveling over the pool of solid state drives. A virtualization layer provides dynamic mapping of virtual volume addresses to physical solid state drives.

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Bucks, United Kingdom

Nigel David Horspool