Memory system
AssigneeKabushiki Kaisha Toshiba
InventorsSeiji Norimatsu, Nobuhiro Ono, Hirokuni Yano, Yasunori Nakamura, Shoji Ninoi
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Abstract
According to one embodiment, a memory system includes a controller for controlling a data transfer between a nonvolatile memory and a host device. The controller writes, to the nonvolatile memory, management information to be used in the data transfer, a multiplexed pointer indicating a storage position, and a log indicating whether the writing of the pointer is successful, determines whether the multiplexing the pointer by the predetermined number is maintained according to at least one of the pointer and the log, and rewrites the multiplexed pointers to the nonvolatile memory when determining that the multiplexing the pointer by the predetermined number is not maintained.
Claims20
A memory system comprising:
- a nonvolatile memory;
- and
- a controller for controlling a data transfer between the nonvolatile memory and a host device,
- wherein the controller writes, to the nonvolatile memory, management information indicating relationships between logical addresses designated by the host device and physical addresses in the nonvolatile memory,
- writes, to the nonvolatile memory, a pointer indicating a storage position of the management information,
- writes, to the nonvolatile memory, a log indicating whether the writing of the pointer is successful,
- multiplexes the pointer by a predetermined number and writes the multiplexed pointers to the nonvolatile memory,
- determines whether the multiplexing the pointer by the predetermined number is maintained according to at least one of the pointer and the log, and
- rewrites the multiplexed pointers to the nonvolatile memory when determining that the multiplexing the pointer by the predetermined number is not maintained.
Dependencies are inferred from the claim text.