Toshiba Memory Corporation

Kioxia Corporation

Kenta Inakagata

A controller of a memory system issues a first memory read request for reading first data at a head of data to be read from a first memory die to the first memory die. When remaining data following the first data is included in the data to be read, the controller transfers a first identifier from a first command queue to a second command queue corresponding to a second memory die in which second data at a head of the remaining data is stored. The controller issues a second memory read request for reading the second data from the second memory die to the second memory die in response to transferring the first identifier to the second command queue.

Memory system

A memory system includes a first volatile semiconductor memory, a second nonvolatile semiconductor memory that includes a plurality of blocks, and a controller configured to store management information in the first semiconductor memory in which identification information of the blocks and corresponding numbers of valid clusters of the blocks are stored and respectively associated with each other. The controller includes a block management unit configured to generate an update instruction to update the number of valid clusters associated with a block in which data is to be written, according to a write request received from a host, and a first memory controller configured to read, from the first semiconductor memory, the number of valid clusters corresponding to the update instruction, update the read number of valid clusters by an update amount corresponding to the update instruction, and write the updated number of valid clusters back to the first semiconductor memory.

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Ota Tokyo, Japan

Kenta Inakagata