Toshiba Memory Corporation

Shinichiro Nakazumi

Yoshihisa Kojima

Katsuhiko Ueki

Tohru Fukuda

According to one embodiment, a memory system includes a memory, and a processor. The memory converts an amount of charge held by a memory cell into a value. The processor executes a first process of reading first data from the memory. The processor executes a second process of reading the first data by making the memory use a first determination potential different in a case where error correction of the first data read through the first process is failed. The processor executes a third process of reading second data from the memory by making the memory use a third determination potential in a case where error correction of the first data read through the second process is succeeded. The third determination potential is the first determination potential used by the memory in a case where error correction of the first data read through the second process is succeeded.

Memory system

A memory system includes a nonvolatile semiconductor memory and a memory controller circuit. The memory controller circuit selects first and second blocks of the nonvolatile semiconductor memory, the first block being a garbage collection target block, the second block being a wear leveling target block or a refresh target block, relocates first data which is valid data stored in the first block in a series of write operations to a third block including first and second write operations, the third block being a block of the nonvolatile semiconductor memory having a free region, and relocates second data which is valid data stored in the second block in a series of write operations to a fourth block including a third write operation, the fourth block having a free region and being different from the third block, wherein the third write operation is performed between the first and second write operations.

Memory system and data relocating method

According to one embodiment, a memory system includes a non-volatile first memory, a second memory, and a memory controller. The memory controller is configured to store a plurality of translation information in the first memory and perform a first process in a case of starting. The translation information indicates a relation between a first address designated from the outside and a second address indicating a location in the first memory. The first process is a process in which the memory controller acquires the plurality of translation information from the first memory in an order of a storage location of the translation information in the first memory, and stores the plurality of acquired translation information in the second memory.

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Kawasaki Kanagawa, Japan

Shinichiro Nakazumi